Rider-1943-PQR.pdf - World Radio History

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6 PACKARD BELL MODELS 673,67BA,67BK,67BKA, 673PR,67BPRDL,67BR PACKARD BELL CO. MODELS 88, 86F, 33PA

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1937 Mastorplece Model 733 WARNING: The following information is to be used only by an experienced serviceman with the proper equipment. In

most cases it is necessary only when set has been tampered with or damaged by accident. I.F. ALIGNMENT: Connect signal generator, through .00025 cond., to grid cap of /C6 tube. Set signal generator at 456

K.C. (this must be accurate), dial pointer at 1700 K.C. Short out oscillator section (center section) of variable cond. gang. Connect suitable output meter across voice coil of loud speaker. (If output meter is not available it will be necessary to adjust by ear, using the loudest note from signal generator.) Increase attenuator until output meter shows deflection or a note is heard from signal generator. Carefully adjust I.F. transformer trimmers for greatest deflection of meter or loudest note from generator. Reduce generator output as intensity of signal increases as I.F.s are tuned nearer their original 456 K.C. setting. Signal should be just audible by ear. Go back over the adjustments to be sure they are correct. Remove short from oscillator section of variable cond. and adjustment is complete.

B.C.-R.F. ALIGNMENT: (1) Connect signal generator, through .00025 cond., to antenna post Al. Short wave switch in broadcast position. (2) Set signal generator and dial pointer to /4007[-C. (3) Adjust ose. B.C. trimmer "A" (see diagram) for greatest deflection of meter or loudest note. (4) Set generator and dial pointer to 1400 K.C. Adjust antenna B.C. trimmer and trimmer "E" for greatest deflection of meter or loudest note. (5) Set generator and dial pointer to 600 K.C. Adjust trimmer "D" for greatest deflection or loudest note. (This adjustment is critical and must be accurate.) Rock cond. gang across 600 K.C. note while adjusting trimmer "D." Repeat adjustment at least twice to be sure it is correct.

POLICE AND AMATEUR BAND ADJUSTMENT: (1) Set switch in Police -Amateur position. Connect signal gen. to ant. post Al through 400 ohm resistor. (2) Set gen. and dial pointer to 6 meg. (6000 K.C.). Carefully adjust trimmer "B" for greatest deflection or loudest note. Check adjustment with gen. and dial pointer at 2 meg. (2000 K.C.).

FOREIGN BAND ADJUSTMENT: (1) Set switch in Foreign position. Connect gen. to ant. post Al through 400 ohm resistor. (2) Set generator and dial pointer to 18 meg. (18000 K.C.). This must be accurate. (3) Carefully adjust trimmer "C" and ant. S.W. trimmer for greatest deflection or loudest note. Check adjustment with gen. and dial pointer at 7 meg. (7000 K.C.). This completes all R.F. adjustments.


PARMAK PAGE 13-3

PARKER & McCRORY MFG. CO. LODî,L 650 1938 Masterpiece

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A-Osc. B.C. Trim. B-Osc. Pol. Trim. C-Osc. SW. Trim. D-Osc. B.C. Pad. E-Pres. B.C. Trim.

Cl. C2-8. C3 -5. C4, C5, C6 -.1-200V. C7, C8 -.5-150V. C9, C10 -.05-200V. C11 -.03-400V.

C12, C13, C16- .01-400V. C14, C15- .01-1000V. C17, C18- .003-400V. C19- .0005 Ceramicon C20- .004 Mica. C21- .0018 Mica.

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R1- 3 Megohms 1/4W. R2- 1 Megohms 1/4W. R3- 1/2 Megohms 1/4W. R4, R18- 150,000 1/4W. R5, R6- 100,000 1/4W. R15- 751/4W. R7- 50,0001/4W. R8- 20,000 1/4W. R9- 12,000 %W. RIO 2,0001/4W R16- 500,000 VC. R11- 1,000 1/4W. R12- 7501/4W. R13- 500 1/4W R14- 2001/4W. R17- 500.000 1-10W.

WARNING: The following information is to be used only by an experienced serviceman with the proper equipment. In most cases it is necessary only when set has been tampered with or damaged by accident.

I.F. ALIGNMENT: Connect signal generator, through .00025 cond., to grid cap of 6D8 tube. Set signal generator at 456 K.C. (this must be accurate), dial pointer at 1790 K.C. Short out oscillator section (center section) of variable cond. gang. Connect suitable output meter across voice coil of loud speaker. (If output meter is not available it will be necessary to adjust by ear, using the loudest note from signal generator.) Increase attenuator until output meter shows deflection or a note is heard from signal generator. Carefully adjust I.F. transformer trimmers for greatest deflection of meter or loudest note from generator. Reduce generator output as intensity of signal increases as I.F.s are tuned nearer their original 456 K.C. setting. Signal should be just audible by ear. Go back over the adjustments to be sure they are correct. Remove short from oscillator section of variable cond. and adjustment is complete.

B.C.-R.F. ALIGNMENT: (1) Connect signal generator, through .00025 cond., to antenna post Al. Short wave switch in broadcast position. (2) Set signal generator and dial pointer to 1700 K.C. (3) Adjust ose. B.C. trimmer "A" (see diagram) for greatest deflection of meter or loudest note. (4) Set generator and dial pointer to 1400 K.C. Adjust antenna B.C. trimmer and trimmer "E" for greatest deflection of meter or loudest note. (5) Set generator and dial pointer to 600 K.C. Adjust trimmer "D" for greatest deflection or loudest note. (This adjustment is critical and must be accurate.) Rock cond. gang across 600 K.C. note while adjusting trimmer "D." Repeat adjustment at least twice to be sure it is correct.

POLICE AND AMATEUR BAND ADJUSTMENT: (1) Set switch in Police -Amateur position. Connect signal gen. to ant. post AI through 400 ohm resistor. (2) Set gen. and dial pointer to 6 meg. (6000 K.C.). Carefully adjust trimmer 'B" for greatest deflection or loudest note. Check adjustment with gen. and dial pointer at 2 meg. (2000 K.C.).

FOREIGN BAND ADJUSTMENT: (1) Set switch in Foreign position. Connect gen. to ant. post Al through 400 ohm resistor. (2) Set generator and dial pointer to 18 meg. (18000 K.C.). This must be accurate. (3) Carefully adjust trimmer "C" and ant. S.W. trimmer for greatest deflection or loudest note. Check adjustment with gen. and dial pointer at 7 meg. (7000 K.C.). This completes all R.F. adjustments.

PM.

©John F. Rider


4 PARMAK MODEL 733 1937 Masterpiece MODEL BA41 1936 Regal PARKER MeCRORY MFG. CO.

1937 MASTERPIECE MODEL 733

I.F. 456 KC FOR OTHER DATA SEE INDEX

VOLUME CONTROL

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©John F. Rider


PHILCO PAGE 13-1

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Part Ne. Antenna Choke 65-0102 ©Condenser (.03 Mfd.) 61-0119 Condenser (.01 Mfd.) 81-0114 81teplacement Cone .

Antenna Transformer 65-0196 (For 73-0027-1) 91-0076 Tuning Condenser 63-0028 (For 73-0027-2) 91-0077 Aerial Compensator 63-0030 ®®®®®®Output Transformer 65-0258 Condenser (.05 Mfd.) 61-0101. $ Field Coll (Not Replaceable) Condenser (.05 Mfd.) .61-0111 Condenser (250 Mmfd.) .60-125157 Antenna Padder (on Tun. Cond.) ®Condenser (.5 Mfd.) ' 61-0106 Condenser (100 Mmfd.) .60-110157 "A" Choke 32-2477 Resistor (10,000 ohms) ..3-310154 Condenser (250 Mmfd.) .60-125157 Resistor (22,000 ohms) .,33-3221348Vibrator Choke 65-0204 Resistor (190 ohms) ..:.33-1193368 Condenser (.5 Mfd.) 61-0137 Condenser (.05 Mfd.) ....61-0111 e(3 Vibrator 83-0025 Pilot Lamp 69-00048 Resistor (220 ohms) ....33-122334 Filament Choke 65-0158 Resistor (220 ohms) ....33-122334 Resistor (100,000 ohms) 33-410154 Tower Transformer 65-0185

Condenser (.015 Mid.) 61-0138 Condenser (100 Mmfd.) .60-110157 Oscillator Padder (on Tun. Cond.)

. Oscillator Transformer 65-0194 Padder (Pri. 1st L F. Trans ) First I. F. Transformer 65-0191 Condenser (.05 Mfd.) 61-0111

®Padder (Sec. 1st I. F. Trans )

bù Resistor (190 ohms) ....33-119336 k Condenser (.05 Mfd.) 61-0111 84tesistor (15,000 ohms) .33-315334 »Volume Control (350,000 ohms)

II & On -OR Switch 67-0020 »RResistor (2,700 ohms) ..33-227434 »;Second I. F. Transformer 65-0192 @PIPadder (Sec. 1st I. F. Trans )

)t Resistor (2,200,000 ohms) 33-522154 ßi'Condenser (250 Mmfd.) .60-125157

Condenser (4,000 Mmfd.) 61-0128 Resistor '

(15,000,000 ohms) .'..33-615154 @Resistor (220,0110 ohms) 33-422151 MReststor (470,000 ohms) 3:i-447154 e Condenser (.01 Mfd.) 61-0120 ®Filter Condenser

(10-10-20 Mfd.) 61-0068 Cl Resistor (190 ohms) .. .33-119336 ®Resistor (2,200 ohms) ..33-222334

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Pointer 57-1940 Tuning Shaft 57-1802 Window Crystal 55-0501 Speaker Unit 73-0027 Tube Side Cover 57-07918'059 Wiring Side Cover 77-0561FC5t) Back Strap 28-5998FA3 Mounting Bracket ....57-0812FC59 Cover Screws W1586FA3 Front Screws 97-0111FA3 Fuse Lead 77-0235 Fuse 45-2559 Vibrator Socket 27-6044, Loktal Socket 55-0575 Pilot Lamp Assembly 77-0342 Signal "A" Lead 77-0217 Generator Interference Condenser - 30-4007' Connection Distributor Resistor 33-1198 Bolt (Radio Mtg.) W I818FA3

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Note 1.-Adjust antenna compensator (5) two turns from tight position. Note 2.-Turn condenser rotor plates completely out of meshas far as they will go. Note 3.-Connect antenna lead, Part No. 95-0185, to antenna receptacle in the

radio. Connect a 30 mmf condenser in series between signal generator and antenna lead.

Note 4.-When antenna stage adjustment is made with radio installed in gar, the radio antenna lead must be connected to car antenna in usual manner. Connect signal generator output lead to a wire placed near car antenna but not connected to it.

Note 5.-After installing radio in ear, tune in a weak broadcast signal between 1200 and 1400 ke. Remove plug button on aide of radio and adjust antenna compensator (5) for maximum signal.

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PHILCO RADIO & TELEVISION CORP.

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ILCO PAGE 13-11

MODELS 42-1008,42-10092.1, PHILCO RADIO & TELEVISION CORP. 42-1009W

ALIGNING R. F. AND I. F. COMPENSATORS MODEL 42-1008. CODE 121; 42-1009w, AND 42-1009M. CODE 121

The following procedure is the same for both models.

EQUIPMENT REQUIRED I. SIGNAL GENERATOR: Covering the frequency range of the receiver, such os Philco Model 070.

2. ALIGNING INDICATOR: Either a vacuum tube voltmeter or oe audio output meter may be used -as an aligning indicator. Philco Models 027 and 028. Circuit testers contain both these meters.

3. TOOLS: Philco Fiber Screw Driver, Port No. 45.2610.

CONNECTING ALIGNING INSTRUMENTS VACUUM TUBE VOLTMETER: To use the vacuum tube voltmeter os an aligning section of the tuning condenser. Connect the ground or low side of the gener-

indicator, make the following connections: Attach the negative (- ) terminal ator to the chassis.

of the voltmeter to any point in the circuit where the A.V.C. voltage can be

obtained. Connect the positive (t) terminal of the vacuum tube voltmeter to When aligning the R. F. padders o loop is mode from o few turns of wire and

the chassis. connected to the signal generator output terminals; the signal generator is then

plo ed close to the loop of the radio. AUDIO OUTPUT METER: Terminal No. I is provided on the loop aerial panel for connecting one lead of the audio output meter to the voice coil of the When adjusting the radio outside the cabinet the loop oerial should be placed

speaker. The other lead of the meter is connected to the chassis. When using in approximately the some position around or near the chassis as when

these connections, the lowest A.C. scale of the meter must be used. (0 to 10 assembled.

volts). After connecting the aligning instruments, adjust the compensators as shown in

The audio output meter can also be connected between the plate of the output the tabulation below. Locations of the compensators are shown in the figure 3.

tube and the ground of the chassis. If the indicating meter pointer goes off scale when adjusting the compensator,

SIGNAL GENERATOR: When adjusting the "I. F." padders, the high side of reduce the strength of the signal from ''le generator. Keep volume control of

the signal generator ¡s connected through o .1 mfd. condenser to the antenna radio at maximum position.

SIGNAL GENERATOR RECEIVER

Operations in Order Output

Connections to Receiver

Dial Setting

Dial Setting

Control Settings

Adjust Compensators in Order

Special Instructions

I

Amt. Section of Tuning Cond.

with .1 .mfd. Cond. 455 K.C.

Tuning Cond. Closed

Vol. Max. Bonds Switch

S. W.

35, 358 43A 47A

2

Loop Signal Generator

1720 K.C. 1720 K.C. Bands Switch "Brdcst" 14 Note A

Loop Signal Generator 1500 K.C. 1500 K.C. Bonds Switch

"Brdat" 7A

4 Loop Signal Generator

530 K.C. 580 K.C. Bands Switch "Brdcst" to

Roll comp. (SA) to max. Recheck

Operation No. 2

Loop Signal Generator

1720 K.C. 1720 K.C. Rands Switch "Ricks*" 14

6 Loop Signal Generator IS M.C. IS M.C. Bands Switch

S. W. 14A, t Not. B

AERIAL CONNECTIONS: The built-in loop aerial system is designed to operate NOTE A.-Dial calibration: In o der to adjust the receiver correctly, the dial without an outside aerial or ground and to give exceptionally sensitive receiving must be aligned to track properly with the tuning condenser. To do performance of stations on the standard and short wave freauencies. When oiler- this, proceed as follows: Turn the tuning condenser to the maximum citing the radio, however, in steel reinforced buildings and other shielded loco- capacity position (plates fully meshed). With the condenser in this tions, the PHILGO Outdoor Aerial Part No. 45-2817 is recommended for maxi- position, set the tuning pointer on the extreme left index line at the

mum receiving performance. The outdoor aerial can be easily connected to the low frequency end of the broadcast scale. radio by inserting the plug attached fo the transformer unit into the socket provided at the rear of the chassis. This aerial can be obtained from your NOTE B.-Adjust podder (I4A) to the second signal peak from the tight pod - local PHILCO distributors. A ground connection is not required with either tien. Roll podder (B) slowly to maximum on the first peak from type of installation. tight position.

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MODELS 42-1008, 42-1009 FREQUENCY END OF DIAL TUNING CONDENSER CLOSED.

INTERMEDIATE FREQUENCY: 455 K.C. power supply. To operate on a I 1 5 -volt, 50 -cycle ,current, the phono-

graph motor must be changed to

TUNING BAND FREQUENCIES: 540 to 1720 K.C.; 9 to 15.5 M.C. t'HILCO TUBES USED: Nine; one 7C5, oscillator; one XXL, converter;

POWER SUPPLY: I I5 volts, 50 or 60 cycle A.C., Consumption Watts. two 7B7, I. F. amplifiers: 7C6, 2nd detector, 1st audio; 7C6, Phono -

These models are shipped for operation on a I15 -volt, 60 -cycle, A.C. graph pre-omplifier; two, 41 audio output, and a 6X5G, Rectifier,


12 PHILCO MODELS 42-1008,42-1009M,

42-1009P7 MODELS 42-1010,42-1011M


MODELS 42-1008,42-1009M,42-1009 ADJUSTING ELECTRIC PUSH-BUTTON TUNING

Select five of the most popular stations received in the locality. Insert the station call letters into the spaces on the buttons. The station with the lowest frequency is placed in the second button from the left and the highest frequency is placed in the sixth push button on the right. Each push button is adjusted by two adjusting screws located on the rear of the chassis. Each set of screws is numbered and labeled "Ant.", "Osc." and covers a frequency range as follows:

KC. 1185 TO

1720

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1600

KC. 710 TO

1 185

KC. 540 TO

980

KC. 540 TG 980

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Looking at the front of the cabinet, the second button on the left is adjusted by adjusting screws No. I and 2. The next push button by adjusting screws No. 3 and 4, and the remaining push buttons in order.

I. Press in "Off -On" push button, turn "Bands" knob to "Broadcast."

2. Set up a Model 070 Signal Generator near the receiver and connect o loop oeris.l (mode fium a few turns of wire 12 inches in

ADJUSTING ELECTRIC The Electric push button tuning mechanism consists of ten push buttons. Five push buttons control and select power supply, Broadcast, Police and Shortwave Bands and Phonograph Operation. The remaining five push buttons are used for automatically selecting five standard broadcast stations.

Select five of the most popular stations received in the locality. Insert the station call letters into the spaces above the buttons. The station with the lowest frequency is placed in the second button from the left and the highest frequency is placed in the sixth push button from the left. Each push button is adjusted by two adjusting screws located on the rear of the chassis. Each set of screws is numbered and labeled "Ant.", "Osc." and covers a frequency range as shown in Fig. I.

Looking at the front of the cabinet, the second button from the left is adjusted by adjusting screws No. I. The next push button by adjusting screws No. 2, and the remaining push buttons in order.

I. Press in "Broadcast" push button.

2. Set up a Model 070 Signal Generator near the receiver and connect a loop aerial (made from a few turns of wire 12 inches in diameter) to the high and ground output jocks of the signal generator. Turn the output controls to maximum and set the modulation control to "MOD. ON."

3. Manually tune in the station to be set up on the first station push button. After doing this set the indicator of the 070 Signal Gen- erator to the frequency of the station being received. As the indicator approaches the frequency of the station a whistle will be heard; leave the indicator at this point.

diameter) to the high and ground output jocks of the signal generator. Turn the output controls to maximum and set the modulation control to "MOD. ON."

3. Manually tune in the station to be set up on the first push button. After doing this set the indicator of the 070 Signal Generator to the frequency of the station being received. As the indicator approaches the frequency of the station a whistle will be heard; leave the indicator at this point.

4. Turn "Bands" knob to "Push button" position. Using the insulated screw driver, turn the No. 2 "Osc." screw until the broadcast station identified by the signal generator is heard; at this point, turn the indicator of the signal generator away from the frequency of the station. Readjust No. 2 "Osc." and No. I "Ant." screws until the station is

clearly and distinctly heard. The push button should then be adjusted properly to the station.

After setting up the first station the same procedure as outlined above is used for the remaining stations. When these models are set up to receive the sound of a television program tuned in by the special type Philco Television Sets or if it is to be used in conjunction with a Philco Record Player, the lowest frequency push button should be used. To

tune in these programs, the same procedure as given for broadcast stations above is used.

Further details for setting up these Radios for operation with Philco

Television Sets or Record Players ore supplied with the instruments.

PUSH BUTTON TUNING 4. Press "in" the second push button from the left of cabinet. Using the insulated screw driver, turn the No. I "Osc." screw until the broadcast station identified by the signal generator is heard; at this point, turn the indicator of the signal generator away from the frequency of the station. Readjust No. I "Osc." and "Ant." screws until the station is clearly and distinctly heard. The push button should then be adjusted properly to the station.

After setting up the first station the some procedure as outlined above is used for the remaining stations. When these models are set up to receive the sound of a television program tuned in by the special type Philco Television Sets or if it is to be used in conjunction with a Philco Record Player, the lowest frequency push button should be used. To tune in these programs, the same procedure as given for broadcast stations above is used.

Further details for setting up these Radios for operation with Philco Television Sets or Record Players are supplied with the instruments.

MODELS 42-1010A42-10111.' /COMPE NSA TOR NCI /7 O PNONO REPRODUCE -1i ADJ K t

OSC EXTERNAL

$OtRET o eOj(OOOOO o ` O C / OO OO PE L E YrSION

900 85 ;50 600510 1600 15( 1300 f200 WOO

FIG. I.-PUSH BUTTON COMPENSATOR LOCATIONS

LIGHT -BEAM REPRODUCER ADJUSTMENTS To reproduce the sound from o record, the light beam Of the reproducer must be carefully positioned -on the light sensitive cell. If the light beam is not core - fully set, the sound reproduction will be distorted, weak or, if the light beam is completely on or off the cell, the phonograph will be silent.

If any of these conditions exist, the following adjustment procedure should be made:

NOTE-These adjustments should be made with the power line voltage at 117 volts A.C.

A. ADJUSTING WIDTH OF LIGHT BEAM To moke this adjustment push the lamp socket assembly into its holder until a clear image of the lamp filament appears on the light cell. The socket should then be slightly pushed in beyond this point until the rectangular spot of light is S/32" in width. The socket assembly is now rotated no that the spotlight is vertical.

B. POSITIONING THE LIGHT REAM To position the light beam on the light cell, turn the adjusting screw at the lower left side of the reproducer until the spot is half on the cell and half on the metal frame surrounding the cell.

C. ADJUSTING INTENSITY OF LAMP When shipped from the factory, the lamp of the reproducer is adjusted for best operating efficiency. The intensity of the light from the lamp is adjusted by Compensator No. 17 located on the radio chassis. Under ordinary circum- stances, an adjustment will not be necessary. When replacing the reproducer or lamp, however, it may be necessary to readjust the light intensity. In this case the compensator is adjusted as follows:

I. Turn volume control on full and play a record.

2. While the record is playing, turn compensator 17 in the direction necessary to obtain the best operating point without distortion. By turning the compensator the strength of the pick-up output is increased or decreased.

D. INSTALLING NEW LAMP When installing a new lamp in the socket, there are two positions in which the lamp can be inserted. Ordinarily, either of these positions can be used. In

some cases, however, due to the lamp filament being off center, the lamp must

be inserted in the position that gives the best centering of the spot of light on the vibrating mirror.

FOR BOTH CHASSIS

©John B. Rider www.americanradiohistory.com

PHILCO PAGE 13-13

MODELS 42-1010,

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()John F. Rider www.americanradiohistory.com

PHILCO PAGE 13-15


ALIGNING R. F. AND I. F. COMPENSATORS The following procedure is the same for both models:

EQUIPMENT REQUIRED

I. SIGNAL GENERATOR: Covering the frequency range of the re-

ceiver, such as Philco Model 070.

2. ALIGNING INDICATOR: Either a vacuum tube voltmeter or an

MODELS 42-1010, 42-1011E

audio output meter may be used os an aligning indicator. Philco

Models 027 and 028 circuit testers contain both these meters.

3. TOOLS: Philco Fiber Screw Driver, Part No. 45.2610.

CONNECTING ALIGNING INSTRUMENTS

Either o vacuum tube voltmeter or an audio output meter may be

used as a signal indicator when adjusting the receiver.

Vacuum Tube Voltmeter: To use the vacuum tube voltmeter as an

aligning indicator, make the following connections: Attach the nega-

tive (-) terminal of the voltmeter to any point in the circuit where

the A. V. C. voltage can be obtained. Connect the positive (+ terminal of the vacuum tube voltmeter to the chassis.

Audio Output Meter: Terminal No. I is provided on the loop aerial

panel for connecting one lead of the audio output meter to 'he voice

coil of the speaker. The other lead of the meter is connected to the

chassis. When using these connections, the lowest A. C. scale of the

meter must be used. (0 to 10 volts).

The audio output meter can also be connected between the plate of

the output tube and the ground of the chassis.

Signal Generator: The radio can be aligned in the cabinet or removed

from the cabinet. When adjusting the "I. F." padders, the high side

of the signal generator is connected through a .1 mfd. condenser so

the lug on the aerial section of the tuning condenser. The ground or

low side of the signal generator is connected to the ground of the

receiver.

When aligning the R. F. padders with the radio in the cabinet, a

loop is made from a few turns of wire and connected to the signal

generator output terminals: the loop is then placed two or three feet

from the loop in the cabinet. If the radio is aligned outside of the

cabinet without the loop connected an aerial input transformer, Part

No. 76-1134, will be required. Insert the transformer into the external

aerial socket on the rear of the chassis. Connect the high output terminal of the signal generator to the terminal on the transformer.

Connect the ground terminal to the chassis.

After connecting the aligning indicator, adjust the compensators in

the order shown in the tabulation below. Locations of the compen-

sators are shown below. If the output meter pointer goes off scale

when adjusting the compensators, reduce the strength of the signal

from the generator.

Opera- tions in Order

SIGNAL GENERATOR RECEIVER SPECIAL

INSTRUCTIONS Output Connections to Receiver

Dial Setting

Dial Setting Control Setting Adjust Compen-

sators in Order

Lug Aerial Section of Tuning Condenser

455 KC 580 KC Vol. Max. "Brdcst" Push-button IN

50A, 41A 40B, 40A

2 Use Loop on Generator

or Aerial Trans. 1500 KC 1500 KC Vol. Max. 'Brdcst" Push-button IN

5E, 5 Note A

3 Use Loop on Generator

or Aerial Trans. 580 KC 580 KC Vol. Max.. "Brdcst" Push-button IN

5D Roll Tuning Condenser Note B

Use Loop on Generator Repeat Operation No. 2

5 Use Loop on Generator 6 MC 6 MC Vol. Max. "Police" Push-button IN SC

6 Use Loop on Generator 15 MC 15 MC Vol. Max. "S W." Push-button IN 5B, SA Note C

NOTE A-DIAL CALIBRATION: In order to adjust the receiver cor ectly, the maximum output on the first signal peak from the tight position (screw alt

dial must be oligned to track properly with the tuning condenser. To adjust the dial, proceed os follows: With the tuning condenser closed (maximum capacity), set the dial pointer on the extreme left index line of the low frequency end of the broadcast stole. The arrangement of the drive cable in this position is shown in the schematic.

NOTE B-When adjusting the low frequency compensator of Range One (Broadcast) or the aerial padders of the high frequency tuning range: the receiver Tuning Condenser must be adjusted (rolled) os follows: First, tune the compensator for maximum output, then vary the tuning condenser of the rece -ver for maximum output. Now turn the compensator slightly to the right or left and again vary the receiver tuning condenser for maximum output. This procedure of first setting the compensator and then varying the -tuning condenser is continued until maximum output rending is obtained.

NOTE C-To accurately adjust the high frequency oscillator compensator fo the fundamental instead of the image signal turn the oscillator compensator (5B) to the maximum capacity position (clockwise). From this position slowly turn the compensator counter -clockwise until a second peak is obtained on the output meter. Adjust the compensator for maximum output at this second peak.

If the above procedure is correctly performed, the image signal will be found (much weaker) by turning the signal generator diol 910 KC above the frequency being used on any high frequency ronge.

The aerial padder (5A) must be adjusted to moximum by rolling the tuning condenser. If two signal peaks occur when turning the padder, udiust the

the way down) of the padder.

FIG. 4.-LOCATIONS OF COMPENSATORS TOP OF CHASSIS 42-1010, 42-1011


16 PHILCO


PHILCO PAGE 13-17

J NOTE:- TOP VIEWS OF SWITCH WAFERS ARE SHOWN

CONNECTED FOR OPERATION ON DIAL TUNING. SHADED ROTORS ARE LOCATED ON UNDERSIDE OF WAFER

X NOTE: THIS SIDE OFAEATTERY

GROUNDED TO CASE. (FRAME OF CAR.)

VIBRATOR

55 54

PART N> 75-0853

7B6' TUBE 2'w DET. 1A7 TUBE

sP1 AUDIO/ 49 I.F

A LEAD

'7Y4TUBE i7C5TUBE' RECTIFIER OUTPUT

No. Description Part No.

8 Antenna Choke 65-0102 Condenser (.01 Mfd.) 61-0114.

p Aerial Compensator Part of aD p Antenna Transformer 65-0323 O Resistor (820 ohms) ....33-182336

Qe Condenser (.05 Mid.) 61-0101 Condenser (.05 Mfd.) 61-0101

De Tuning Condenser 63-0047 oe Antenna Padder (on Tun. Cond.)

Antenna Padder Assembly 77-0512 Wafer Switch 77-0506

Q Resistor (10,000 ohms) .33-310334 ® Wave Trap Padder Part of 43

R. F. Transformer 65-0321 s Resistor - (1,000,000 ohms) .....33-510154

ISTOET-OSG.

1.000, Doon +vLuvvlP-

11.000n

ommiedote

O1+ 1

7BBTUBE DET. 05C.

óJ(64 7ET UBE

R.E

CV

J

r

AERIAL RECEPTen

® Condenser (25 Mmfd.) .30-1067 ® Resistor (100,000 ohms) 33-43,0154

s Silver Mica Condenser (280 Mmfd.) 61-0043

í(s Oscillator Padder (on Tun. Cond.) ® Condenser (250 Mmfd.) .60-125157 ® Condenser (.03 Mfd.l ... 61-0101. ® Resistor (68,000 ohms) .33-368334 ®® Padder (Pd. 1st I. F. Trans.)

Silver Mica Condenser (485 Mmfd.) 61-0144

® Resistor (22,000 ohms) .33-322434 ®® Condenser (15 Mmfd.) ..60-015327

Resistor (1,000,000 ohms) ....33-510154 3 Condenser_ (.05 Mfd.) 01-0101

1 DDET. IST. AUDIO

RECTIFIER

TV4

MODEL AR -50

OUTPUT

FOR OTHER DATA SEE INDEX

First i. F. Transformer ..65-0319 Vlbrât 83-0025 Padder Sec. 1st. I. F. Trans. Condenser (.5 Mfd.) 61-0137

Resistor (220 ohms) ....33-122334 fiers Power Transformer 65-0318

65-0173 Condenser (3000 Mmfd.) 61-0115' Resistor (1000 ohms) ...33-210434

65-0172 Q Condenser (250 Mmfd.) .60-125157 A Test Socket 55-1114

65-0171 $3 Test Link 57-1121 A On -Off Switch 85-0112

65-0170 3 Pilot Lamp 34-2039. 43 Condenser (.25 Mfd.) 61-0195

65-0166 3 Condenser (.05 Mrd.) 61-0101'

® Resistor (4700 ohms) ..33-247334 Q Condenser (6000 Mmfd.) 61-0155 e Resistor (27,000 ohms) .33-327154 ® Padder (Prl. 2nd I. F. Trans.) ® Second I. F. Transformer 65-0320 Q Padder (Sec. 2nd I. F. Trans.) 43 Resistor

(15,000,000 ohms) ..33-615154 Q Condenser (.01 Mid.) 61-0114

(22 ,

4

(20,000 ohms) 33-2 314 Condenser

ss Tone Control Switch Wafer 77-0733 ® Resistor (470,000 ohms) 33-447154 ® Filter Condenser

(10-15-20 Mfd.) 61-0089 ® Resistor (220 ohms) ...33-122436 ® Condenser (.015 Mfd.) 61-0138 Q Output Transformer 65-0419 e Replacement Cone

(For 73-0059-4 Speaker) 91-0209 (For 73-0059-9 Speaker) 91-0213

Field Coil Not Replaceable ee4 Filament Choke 32-2729 7 Col denser (.5 Mrd.) 61-0106 ® Condenser (250 Mfd.) ..60-125157 3 Condenser (250 Mmfd.) .60-125157 eg Resistor (180 ohms) ....33-118336 ® vibrator Choke 65-0075

Resistor (470 ohms) ...33-147336 - 4 Oscillator Transformer (550-1065 KC)

Q Oscillator Transformer (600-1165 KC)A

Oscillator Transformer (660-1240 }CC)

® Oscillator Transformer (750 1410 KC)

Oscillator Transformer (355-1580 KC)

® Low Frequency Padder ....63-0048 Resistor (150 ohms) ....33-115334'

® Manual Oscillator Q Resistor (1500 ohms) ...33-215334 Transformer 65-0420 Q Condenser (.07 Mfd.) 61-0152

4J Resistor (330 ohms) ....33-133334 g Resistor (47,000 ohms) .33-347331 Q Condenser (.1 Mfd.) 61-0104g Condenser (6000 Mmfd.) ..61-0155 8 Volume Control Radio Housing 77-0752FC59

(350,000 ohms) 67-0043 Control Assembly .........85-0133 55-1194 55-0035

57-1425FÁ3 57-1385

Dial Drive Cord Drive Cord Spring Tuning Shaft Volume Shaft 57-1384. Push Button Shaft 57-1386 Cable Clamps 57-1429FA38 Pointer 57-1889FCP Station Indicator Drum ...77-0755 Tone Control Lead 95-0135' Hook Bolt

(Radio Mtg.) 57-1340FAT 1,ockwasher (Radio Mtg.) W 166SFE7 Nut (Radio Mtg.) W98FA3 Speaker Unit 73-0059 Interference Condenser 40-4007, Distributor Resistor 33-1196 Speaker Cover 57-1942FC59, Wiring Side Cover 57-13451059 Padder Cover 57-1348FC59 Loktal Socket 55-0575 Vibrator Socket 27-6153 Screw & Core Assembly 57-1383 Brass Coil Cup W2032 Speaker Cable 95-0192 Volume Control Cable 95-0182 Volume Control Nut W684FA3, Tone Switch Shaft ....57-1839FA3


18 PHILCO MODLL AR -55

PHILCO RADIO & TELEVISION CORP

-II

L._ NOTE- TOP VIEWS OF SWITCH WAFERS ARE SHOWN

CONNECTED FOR OPERATION ON DIAL TUNING. SHADED ROTORS ARE LOCATED ON UNDERSIDE Of WAFERS.

'Ro----c\-Pb/ o NOTE' THIS SIDE OF A SATTER,'

GROUNDED TO CASE. (FRANC OF CAR)

No. Description Part, No. i Antenna Choke 65-0102 o Condenser (.O1 Mfd.) 61-0114

QQ Aerial Compensator Part of ®' a Antenna Transformer 65-0323 s Resistor (820 ohms) ....33-182336

© Condenser (.05 Mfd.) 61-0101 Te) Condenser (.05 Mfd.) 61-0101 e Tuning Condenser 63-0047

Qs Antenna Padder (on Pun. Cond.) o Antenna Padder Assembly

(For Push Buttons) 77-0512 n Wafer Switch 77-0506 Q Resistor (10,000 ohms) .33-310334 Q Wave Trap Padder Part of Ii R. F. Transformer 65-0321 Q Resistor

(1,000,000 ohms) ..33-510154 fOi Condenser (25 Mmfd.) 30-1067 g Resistor (100.000 ohms) 33-410154 g Condenser (280 Mmfd.) 61-0043 el) High Frequency Padder

(on Tun. Cond.) áq Condenser (250 Mmfd.) ..60-125157 xi Condenser (.05 Mfd.) 61-0101 e Resistor (68,000 ohms) .33-368334 e Padder (Fri. 1st I. F. Trans.) fO Condenser (485 Mmfd.) 61-0144 A Resistor (22,000 ohms) .33-322434 e Condenser (15 Mmfd.) ..60-015327 Q Resistor

(1,000,000 ohms) ....33-510154 ® Condenser (.05 Mfd.) 61-0101 ® First I. F. Transformer 65-0319 Qe) Padder (Sec. 1st I. F. Trans ) e Resistor (180 ohms) ....33-118336

Oscillator Transformer (550-1065 KC) 65-0173

® Oscillator Transformer (600-1165 KC) 65-0172



Oscillator Transformer (855-1580 KC) 65-0169

Low Frequency Padder 63-0048 Manual Oscillator Trans. . 65-0420 Resistor (15,000 ohms) ..33-31554

® Condenser (.01 Mfd.) 61-0 14 ® Volume Control

(350,000 ohms) 67-0032 Q Resistor (4.700 ohms) .33-247334 ® Condenser (6,000 Almfd.) .61-0155 ® kesistor (27.000 ohms) .33-327154 O 1 -adder (Pri. 2nd 1. F. Trans.)

PHILCO MODEL AR -55 I.F.= 455 KC

ISTDEL-OSC

4s5rrf

1,000,O0oA

No. Description Part No. Second I. F. Transformer 85-0320 Padder (Sec. 2nd I. F. Trans ) Resistor

(15,000,000 ohms) -.38-615154 ® Condenser (6,000 Mmfd.) 61-0155

Resistor (220,000 ohms) 33-422334 Q Condenser (.01 Mfd.) 61-0120 Q Tone Control Switch Wafer 77-0733 ® Resistor (470,000 ohms) 33-447154 ® Filter Condenser

(10-15-20 Mfd.) 61-0089 ® Resistor (220 ohms) ....33-122436 ® Condenser (.01 Mfd.) 61-0124 ® Output Transformer 65-0408 ® Replacement Cone

(For 73-0047-2 Speaker) 91-0086 (For 73-0047-3 Speaker) 91-0126 (For 73-0058-2 Speaker) 91-0086 (For 73-0058-3 Speaker) 91-0126 e Field Coil Assembly .Not Replaceable

e Filament Choke 32-2729 sl Condenser (.5 MEd.) 61-0106 ® Condenser (250 Mmfd.) .60-125157

Condenser (250 Mmfd.) .60-125157 Resistor (150 ohms) ....33-115334

® Vibrator Choke 65-0075 Q Vihrator 83-0025 Q Condenser (.5 Mfd.) 61-0137 Si Resistor (220 ohms) ....33-12'9334 ® Power Transformer 65-0318 Q Condenser (3,000 Mmfd.) _61-0113 Q Resistor (1,000 ohms) ..33-210434 Q Condenser (250 Mmfd.) .60-125157 e Condenser (250 Mmfd.) .60-125157 - Condenser (250 Mmfd.) .60-125157 T "On -Off" Switch 85-0112 8 Pilot Lamp 34-2039 Q Condenser (.25 Mfd.) 81-0125 ® Condenser (.05 Mfd.) 61-0101 +. Resistor (180 ohms) ....33-118336

® Test Socket 55-1118 e1 Test Link 57-1121 rni Resistor (47,000 ohms) .33-347334 ® Condenser (6,000 Mmfd.) 61-0155

Receiver Housing 77-0694FC59 Control Assembly 85-0133 Dial 55-1194 Drive Cord 55-0935 Drive Cord Spring ....57-1425FA3 Tuning Shaft 57-1385 Volume Shaft 57-1384 Push Button Shaft 57-1386 Pointer 57-1889FCP Station Indicator Drum ...77-0755 Tone Control Lead 95-0135

I ST. AUDIO

550,000 TOTAL TAP AT 35. own.

wO,vvf

No. Description Hook Bolt

(Receiver Mtg.) .... 37-1340FÁ3 Lockwasher

(Receiver Mtg.) W1668F1 7 Nut (Receiver Mtg.) W98FA3 Cable Clamps 57-1429FA38 Interference Condenser ....30-4007 Distributor Resistor 33-1196 Tube Side Cover 318-2382 Wiring Side Cover ....57-1345FC59 Padder Cover 57-1348FC59 Speaker Socket 55-0443 Loktal Socket 55-1075 Vibrator Socket 27-6153 Screw & Core Assembly 57-1363 Coil Cups (Brass) W-2032 Volume Control Nut W684FA3 Tone Control Switch

Shaft

The following parts

Speaker:

!VIBRATOR(

57- are f

7 ?CS TUBE oul 7PUTI

1839FA3 or the Dash

BR TUBE 2NO OCT. 7A7 TUBE 7B6 TUBE

IIStAUDIOI II F. I DEI T-OSC.I

754 TUBE RECTIFIER

z7

e0

31

6D ED¡_. ® 77 ® 3

`) O\'J SPEAKER SOCKET

7A7 TUBE RF.

RECTIFIER

7Y4

OUTPUT

1000 4.

i 1 9

Part No. Speak r & Housing Complete 318-2393

Speaker Unit 73-0058 Stud (Speaker Mtg.) 57-0892 Washer (Speaker Mtg.) ..2703FA3 Lockwasher (Speaker Mtg.) . W338 Nut (Speaker Mtg.) W.55FA3 Wood Spacer (Speaker Mtg.) 55-11642

The following parts are for the Instru- ment Board Speaker:

Speaker 73-0047 U" Bracket 57-0720FA3

Rubber Gasket & Screen ...55-0958 Side Brackets 57-1461 Cardboard Baffle 55-0957 Cardboard Spacers 55-0449 Nuts (Speaker Mtg.) W124FA3 Screw (Speaker Mtg.) W1582FA4 Lockwasher (Speaker Mtg.) ... W291 Lockwasher (Speaker Mtg ) W286 Carriage Bolt 97-0061FA3 Carriage Bolt Nut W98FA3 Bolt (Bracket Mtg.) ..97-0120FA34

o

AERIAL RECEPTACLE


PHILCO PAGE 13-19

MODEL AR -65

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©John F. Rider


20 PHILCO MODEL AR -6 5


INSTRUCTIONS FOR ADJUSTING SHORT WAVE PADDERS (FIGURE 3)

SIGNAL GENERATOR ADJUST OPERATION

FREQUENCY CONNECTION DUMMY CAPACITY SPECIAL INSTRUCTIONS PADDlR

1

2

3

1

2

3

PUSH IN

IO M.C.

9.5 M.C.

6 M.C.

PUSH IN

12.1 M.C.

11.9 M.C.

11.7 M.C.

OPERATIONS

THE RIGHT HAND KNOB ON THE BAND

To Aerial Receptacle on Radio



THE RIGHT HAND KNOB ON THE THE BAND




2 AND 3 ARE IMPORTANT SIGNAL

THE CONTROL UNTIL THE INDICATOR WINDOW

Note I

Note 1

Note I

CONTROL UNTIL THE INDICATOR WINDOW

Note I

Note I

Note I

AND MUST BE REPEATED IS RECEIVED

"RED" DOT APPEARS IN

Note 2 Rotate Tuning Condenser to

9.5 M.C. Signal Rotate Tuning Condenser to

6 M.C. Signal "WHITE" DOT APPEARS IN

Note 2

Rotate Tuning Condenser to 11.9 M.C. Signal

Rotate Tuning Condenser to 11.7 M.C. Signal

UNTIL MAXIMUM

OSC. 10 M.C. Pad to Outer Peak

ANT. 9.5 M.C.

ANT. 6 M.C.

OSC. 12.1 M.C.

ANT. 11.9 M.C.

ANT. 11.7 M.C.

SIGNAL GENERATOR PADDER

PERATION FREQUENCY CONNECTION

DUMMY CAPACITY SPECIAL INSTRUCTIONS PADDER

I

2

3

4

5

6

7

8

PUSH IN

455 K.C.

1580 K.C.

1400 K.C.

580 K.C.

1580 K.C.

1400 K.C.

580 K.C.

THE RIGHT HAND KNOB ON INDICATOR WINDOW AND








THE CONTROL UNTIL THE BLACK STATIONS CAN BE TUNED IN

.1 Mfd.

See Note I

See Note I

See Note I

See Note I

See Note I

See Note I

DOT APPEARS IN THE BAND BY MANUAL TUNING

Note 2

Note 2

Set Tuning Condenser at 1400 K.C.


Note 2



©ie

No® 4

Note 3 e . ce

Note 4

No® 3

Make NOTE

aerial receptacle series between

NOTE mesh as

NOTE frequency

VIBRATOR

all adjustments for maximum reading on the output I -Connect the aerial lead, Part No. 95-0185,

in the radio. Connect a 10 mmfd. Condenser the signal generator and the aerial lead.

2-Turn the condenser rotor plates completely far as they will go. 3- Rock the tuning condenser while adjusting padder. Tune the condenser to the signal

7B6TUBE 2' DIT l .IV AUDIO, 7A7 TUBE al

meter. the padder for maximum output. Rotate the tuning condenser beck to the and forth slightly for maximum output. Then readjust the padder

in for maximum output. Repeat this procedure until no further improvement is noticed.

NOTE 4-When the aerial stage adjustment is made with the out of Radio installed in the car, the Radio aerial lead must be connected to the car aerial in the usual manner. Connect the signal gen -

the low erator output lead to a wire placed near the car aerial but not and adjust connected to it.

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PHILCO RADIO & TELEVISION CORP. PHILCO MODEL AR -75

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No. Description Part No. 101 Antenna Choke 65-0102 º Condenser (.01 Mfd.) 61-0014

Qs Antenna Transformer 65-0323 Aerial Compensator Part of eg Resistor (330 ohms) ....33-133336 Condenser (.05 Mfd.) 61-0111 Condenser (.05 Mfd.) 61-0101 Antenna Padder Assembly 77-0512 Tuning Condenser 63-0047

® R. F. Padder (on l'un. Cond.). Oscillator Padder (on Tun. Cond.)

® Silver Mica Condenser (280 Mmfd.) 61-0043

® Wafer Switch Assembly 77-0506 ® Resistor (100,000 ohms) 33-410154

Resistor (10,000 ohms) 33-310334 I. F. Wave 'trap Padder ..Part of Q R. F. Transformer 65-0321 Coil Part of @J 8. Padder l'art of )

® Condenser (25 Maud.) ....30-1067 ® Resistor

(1,000,000 ohms) ...33510154 ® Condenser (.05 Mfd.) 61-0101 ® Resistor (150 ohms) ..33-115336 ® Condenser (250 Mmfd.) 60-125157

Padder (Pri. 1st I. F. Trans.) First I. F. Transformer 65-0310 Padder (Sec. 1st I. F. Trans ) Resistor (150 ohms) ....33-115336 Condenser (.05 Mfd.) 61-0111

® Resistor (68,000 ohms) 33-368339 e Silver Mica Condenser (485 Mmfd.) 61-0144

® Oscillator Transformer (550-1065 K.C.) 65-0173


Oscillator Transformer (660-1240 K.C.) 65-0171



® Manual Oscillator Transformer 65-0420

Low Frequency Padder 63-0048 0. Condenser (15 Mmfd.) ..61-015327 ® Resistor (22,000 ohms) .33-322434 ® Condenser (.05 Mfd.) 61-0101 e Resistor

(1,000,000 ohms) .33-510154 ® Padder (Pri. 2nd I. F. Trans.) ® Second I. F. Transformer 65-0320 ®® Padder (Sec. 2nd I. F. Trans.)

1® Resistor (27.000 ohms) ..33-327154 íc Volume Control

O O O O O O

2MDDET. IST. ADDIO

er=.o41 )11D

(-! i3g___,r

\\>(1 /\ No. Description Part No.

(350,000 ohms) 67-0043 Resistor (470 ohms) ....33-147336

D Condenser (.01 Mfd.) 61-0110 8 Resistor (10,000,000 ohms) ..33-610154

Q Condenser (.25 Mfd.) 61-0112 8 Condenser (100 Mmfd.) ..60-11011

Tone Control Switch 77-0733 Resistor (220,000 ohms) 33-422334 Condenser (6,000 Mmfd.) 61-006211

® Condenser (4,000 Mmfd.) 61-0129 s9 Resistor

(10.000,000 ohms) ..33-610154

1oResistor

(477,000 ohms) .33-347334 Resistor (47,000 ohms) .33-347334 Condenser (.05 Mfd.) 61-0122 Resistor (470,000 ohms) 33-447154 Resistor (330 ohms) ....33-133436

® Filter Condenser (5-10-20-20 Mfd.) 61-0150

4 Condenser (.05 Mfd.) 61-0101 Resistor (470;000 ohms) 33-447154

It Resistor (2,200 ohms) ..33-222334 Condenser (.07 Mfd.) 61-0152 - Condenser (.1 Mfd.) 61-0113

® Resistor (4,700 ohms) ..33-247334 Resistor (1,500 ohms) ..33-215334 Condenser (.01 Mfd.) 61-0124 Output Transformer 65-0402

® Cone & Voice Coil (For 73-0056-2 Speaker) (For 73-0056-3 Speaker) e Condenser (250 Mmfd.) .60

T Field Coil Not Re 8 Condenser (250 Mmfd.) .60

Test Plug Link Test Socket Resistor (1,000 ohms) ..33 Condenser (5,000 Mmfd.) Power Transformer Resistor (220 ohms) ....33

® Condenser (.5 Mfd.) ® Vibrator 8 Vibrator Choke

Pilot Lamp Q Condenser (.5 Mfd.) NIP On -Oft Switch

Fuse A" Choke

Condenser (250 Mmfd.) .60 Housing 77-0 Control Assembly Dial Cord Tuning Shaft Volume Shaft Push Button Shaft

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PHILCO PAGE 13-21

FOR tçOTHERDATA

PHASE INVERTER outllrt SEE INDEX

RECtIFIEk IQ000-,)g'

e5

543} `tS TYKE OUTDYT

91-0164 OBMription 91-0165 Pointer

Ma Tuer r Dosse.

TONS LDNTRDY AOtt

® ,5 77 75 m Tis au © DurÓT 50tKÉ

F® m © 00 17 G

-125157 Station Indicator Drum placeable Assembly 77-0755 -125157 Tone Control Lead 57-1121 (Receiver End) 55-1118 Tone Control Lead -210434 (Control End) 61-0153 Hook Bolt 85-0403 (Radio Mtg.) 5 -122334 Lockwasher 61-0134 (Radio Mtg.) 83-0025 65-0075 34-2039 Distributor Resistor 33-1196 61-0134 Tube Side Cover 318-2326 85-0112 Wiring Side Cover ...57-1863FC54 45-2559 Padder Cover 318-2325 32-1561 Speaker Socket 55-1117 -125157 Loktal Socket 55-0575 694FC54 Vibrator Socket 27-6153 85-0129 Screw & Core Assembly 57-1363 55-1194 Bra108 s0.owing

parts are used 57-1385 strument board speaker mounting: 57-1384 Speaker Unit 73-90114

32

57-1384 Cardboard Baffle 55-0957 57-1386

Part No. 57-1889

95-0176

95-0175

7-1340FÁ3

W1668FE7 Nut (Radio Mtg.) W98FA3 Interference Condenser ..30-4007

'4t 41 L_SOCORT'

No. Description Part'Ni, Rubber Gasket and Screen 55-1320 "U" Bracket 57-2162FA3 Side Brackets 57-1461FA3 Bolt (Bracket Mtg.) 97-0120FA3 Cardboard Spacers 55-0449 Nut (Speaker Mtg.) W124FA3 Screw (Speaker Mtg.) .. W 1582FA4 Lockwasher (Speaker Mtg.) .. W291 Lockwasher (Speaker Mtg.) W286 Carriage Bolt 97-C061FA3 Carriage Bolt Nut W98FA3

The following parts are used for dash speaker mounting:

Speaker & Housing Complete

Speaker Unit Speaker Housing Stud (Speaker Mtg.) Washer (Speaker Mtg.) Washer (Speaker Mtg.) Nut (Speaker Mtg.) Back Cover

In Screen & Cloth Assembly 77-0749 Ornament 57-0607FA8 Speaker Cable 95-0171

77-0748 73-0058

57-0642FC54 8122 4488

W679 W55A

77-0220

©John F. Rider


22 PHILCO MODEL Studebaker Tuner Part 77-0588 PHILCO RADIO & TELEVISION CORP.

MODEL Packard Tuner Part 77»0636

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PHILCO PAGE 13-23

MODEL S-1616


MODEL S-1616 INSTALLING CALL LETTERS IN AUTOMATIC

TUNING DIAL One of the "A" leads on the back of the control head must

be connected so that the current is supplied to operate the automatic control dial. Insert the fuse in the fuse housing in the separate "A" lead (supplied in the radio package), and connect to the "A" lead on the control. The eyelet end of this lead should be connected to the terminal of the Gas Gauge nearest the center of the car.

1-Select and remove from the Call Letter Sheets, the Call Letters of five popular stations in the area in which the radio is to be operated and that comes within the frequency range of the positions on the dial as shown in Illustration for Model S-1616.

2-If the section of the dial in which the tab marked "DIAL" is not at the indicator window, push the Automatic Station Selector until it is in position in the indicator window. The control must be held against the edge of the instrument panel in order to complete the electrical circuit. 3-Push the Automatic Station Selector once more and No. 1 section of the dial will rotate to the front. Insert in this position the call letter tab of the station having the highest kilocycle frequency.

EXAMPLE: The No. 1 position may have the call letters of a station operating on 1400 kilocycles; the No. 2 position, a station operating on 1050 kilocycles. etc.

4-Repeat this procedure until all five call letter tabs selected are inserted in the dial in the order of their frequency. Be sure and record the call letters with respect to their position on the dial for use in setting up the adjusting screws.

5-The control unit should now be completely installed. Remove the trim panel covering the control openings and place the control unit in position in the back of the instrument panel. Insert the bezel windows in the bezel plate, and apply the bezel plate to the front of the panel. The control and bezel are assembled to the instrument with gland nuts. Using the special gland nut wrench provided, tighten the nuts and then apply the two knobs.

SETTING UP THE RECEIVER FOR AUTOMATIC TUNING

Before setting up the Receiver for automatic tuning, it is necessary to synchronize the automatic dial to the Receiver as follows:

Try to tune in a station with the tuning control knob. If no station can be picked up, push the automatic station selector button until the position is found where stations can be tuned in. This is the "DIAL" position. Remove the automatic control cable from the Receiver and again push the automatic station selector button until the word "DIAL" appears in the dial window. The automatic control cable should then be replaced in its socket on the Receiver and secured with the two self threading screws supplied.

1-Turn the Receiver on and allow it to operate for TWENTY minutes. Remove the cover plate over the automatic tuning adjusting screws. This plate is on the control end of the Receiver and can easily be pried off.

2-Push the automatic station selector button until the word "DIAL" is at the indicator window. Tune in the station whose call letters are in the No. 5 position on the dial (the lowest frequency station) and note the program. Push the automatic selector button five times and this station's call letters will appear at the indicator window.

IMPORTANT-Start adjustments with low frequency screws. 3-With a small screwdriver, turn the No. 5 adjusting screw

(See Illustration for Model S-1616) in the left column to the right or left until the station is tuned in. Now adjust the corresponding screw in the right column until maximum volume is obtained. Make these adjustments carefully, as it may be easy to pass by the loudest point on some stations.

4-Press the automatic station selector button until "DIAL" again is at the indicator window and tune in the station whose call letters are in the No. 4 position on the automatic dial (the next higher frequency). Press the automatic button four times and adjust the number 4 set of adjusting screws to this station.

Repeat this procedure until each of the five pairs of adjusting screws has been tuned to its respective station.

It is NECESSARY that the setting of the adjusting screws be repeated to be sure they are properly set so that maximum performance may be had.

WSCREWS TURN ADJUSTING

COUNTER CLOCK- WISE TO INCREASE AND CLOCKWISE TO DECREASE

FREQUENCY.

FREQUENCY RANGE

550 TO 950 KC

600 TO 1000 KC

800 TO 1250 KO

950 TO 1400 KC

1000 T01580 KG

ADJUSTING SCREWS

VIEW OF AUTOMATIC ADJUSTING SCREWS

Be sure and save the unused call letters giving them to the owner as they may be needed at some future time if the radio is to be operated in a different area where the local stations are not the same.

If the Stations set up on the Automatic Tuning Dial should at some time tune in at the wrong position, the dial can be easily synchronized to the radio as follows:

9501.14M SC

600m1000 KC

10001o1580 550 10 950 KC } KC

DIAL POSITION

PHANTOM VIEW OF THE AUTOMATIC -DIAL SHOWING POSITIONS ON DIAL AND FREQUENCY

RANGE OF EACH

1-Find "DIAL" position as explained in the second Para- graph under "Setting up the Receiver for Automatic Tuning."

2-Remove the automatic cable from the socket on the end of the Receiver.

3-Press the automatic station selector button until "DIAL" appears in the Automatic Window.

4-Replace automatic cable.


©John F. Rider


?AGE 13-24 PHILçO MODEL P-1617 MODEL C-1703

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©John F. Rider


PHILCO PAGE 13-25

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26 PHILCO

MODELS S-1626 G-1628 PHILCO RADIO

MODELS S -

SETTING UP THE RECEIVER FOR AUTOMATIC TUNING

& TELEVISION CORP.

1626 and G-1628

Select and remove from the Call Letter Sheets, the Call Letters of five popular stations received in the area in which the radio is to be operated and that come within the frequency range of the adjusting screws as shown in Illustration for Models S-1626, G-1628. Also remove the tab marked "DIAL."

Insert the "DIAL" tab in the slot in the dial which is at the front.

Hold the control against the edge of the instrument panel in order to complete the electrical circuit and push the automatic selector button. The dial will rotate one position. Insert in the dial, the call letter tab of the station having the highest frequency in kilocycles. Press the selector button once more and insert the call letters of the station with the next highest frequency in kilocycles.

EXAMPLE-The first position may have the call letters of a station operating on 1400 kilocycles; the second position, a station operating on 1050 kilocycles, etc. Repeat this procedure until all five call letter tabs selected are inserted in the dial in the order of their frequency. Be sure and record the call letters with respect to their position on the dial for use in setting up the adjusting screws.

Before setting up the Receiver for automatic tuning, it is

necessary to synchronize the automatic dial to the Receiver as follows:

Try to tune in a station with the tuning control knob. If no station can be picked up, push the automatic station selector button until the position is found where stations can be tuned in. This is the "DIAL" position. Remove the automatic control cable from the Receiver and again push the automatic station selector button until the word "DIAL" appears in the dial window. The automatic control cable should then be replaced in its socket on the Receiver and secured with the two self threading screws supplied.

1-Turn the Receiver on and allow it to operate for TWENTY minutes. Remove the cover plate over the automatic tuning adjusting screws. This plate is on the front of the Receiver and can easily be pried off.

2-Push the automatic station selector button until the word "DIAL" is at the indicator window. Tune in the station whose call letters are in No. 5 position on the dial (the lowest frequency station) and note the program. Push the automatic selector button five times and this station's call letters will

appear at the indicator window.

3-With a small screwdriver, turn the No. 5 adjusting screw (See Illustration for Models S-1626, S-1628) in the left column to the right or left until the station is tuned in. Now

adjust the corresponding screw in the right column until maximum volume is obtained. Make these adjustments carefully, as it may be easy to pass by the loudest point on some

stations. 4-Press the automatic station selector button until "DIAL"

again is at the indicator window and tune in the station whose

call letters are in the No. 4 position on the automatic dial

(the next higher frequency). Press the automatic button four times and adjust the number 4 set of adjusting screws.

Repeat this procedure until each of the five pairs of adjusting screws has been tuned to its respective station.

It is NECESSARY that the setting of the adjusting screws

be repeated to be sure they are properly set so that maximum performance may be had.

Be sure and save the unused call letters, giving them to the owner as they may be needed at some future time if the radio is to be operated in a different area where the local stations are not the same.

If the Stations set up on the Automatic Tuning Dial should at some time tune in at the wrong position, the dial can be easily synchronized to the radio as follows:

1-Find "DIAL" position as explained in the second Para- graph under "Setting up the Receiver for Automatic Tuning."

2-Remove the automatic cable from the socket on the end end of the Receiver.

3-Press the automatic station selector button until "DIAL" appears in the Automatic Window.

4-Replace automatic cable.

erSCREWSTURN

ADJUSTING COUNTER CLOCK-

WISE TO INCREASE AND i CLOCKWISE TO DECREASE FREQUENCY.

FREQUENCY RANGE

550 T0 950 KC

600 T01000 KC

f 50 TO 1400 KC

1000 70 1580 KC

ADJUSTING SCREWS

VIEW OF AUTOMATIC ADJUSTING SCREWS


PHILCO PAGE 13-27

MODEL S-1726 PHILCO RADIO & TELEVISION CORP.

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28 PHILCO MODEL S-1726


MODEL S-1726

The antenna and touch tuning station adjustments are accessible from the front of the receiver when the two screws holding the cover plate are removed. On cars equipped with the "Climatizer", it will be necessary to remove the 'screws holding the "Climatizer" control assembly to the lower edge of the instrument panel and drop it down out of the way while making the adjustments.

1-Turn on the radio set and allow it to heat for at least twenty minutes before starting any adjustments.

2-Press the touch control button until the word "DIAL" appears in the "DIAL" window. Tune in a weak station on the manual dial between 1350 and 1500 kilocycles. Now adjust the antenna high frequency compensating screw (See Illus- tration) until maximum volume is obtained.

3-Select five stations within the frequency range shown over each set of adjusting screws (See Illustration). Remove the call letters for these stations from the call letter tab sheet. Remove the top cover of the set; this exposes the plastic drum into which the tabs should be inserted. It is important to insert these tabs in a definite relationship with respect to frequency in order that tuning adjustments can be made properly. Arrange the tabs in the order of frequency from high to low, placing the highest frequency on the drum im- mediately next to the dial tab in a counter clockwise direction. Insert the remaining tabs in the order of freouency in this same counter clockwise direction. If the tabs have been inserted correctly, it will be found that when the word "DIAL" shows in the window, the next push of the button will place the call letter for the highest frequency station in the window. Each successive push of the control button will place a next lower frequency station in the window until the series is repeated.

TOUCH CONTROL

4-With "DIAL" showing in the dial window, manually tune in the station to be set up on push button number 1 and identify the program.

5-Press the touch control button once and adjust the left hand screw using the .small end of the special screw driver, until the station identified has been tuned in as accurately as possible. A final adjustment can be made by inserting the large end of the screw driver into the vernier adjusting screw. Careful adjustment of this screw will insure maximum performance in areas where reception is poor. NOTE: Stations of the higher frequencies are tuned in by turning the screws to the left or counter clockwise. Lower frequency stations are tuned by turning to the 'right or clockwise. Proceed in like manner with the adjustment of each of the remaining stations in the order of frequency until all five stations selected have been tuned in. Because there is some detuning of the coils (lue to the movements of the cores in adjacent coils, it is necessary to re -check the adjustments again going back from right to left and again re -checking from left to right. This is Impor- tant for accurate reception while driving at a distance from the broadcasting stations.

6-This final re -checking of adjustments should be made in an area of low signal strength in ydur service station or in some known "dead" spot where signals can just barely be heard.

7-Replace the cover plate over the adjusting screws and replace the "Climatiser" controls.

BE SURE AND SAVE THE UNUSED CALL LETTERS, GIVING THEM TO THE OWNER AS THEY MAY BE NEEDED AT SOME FUTURE TIME IF THE RADIO IS TO BE OPERATED IN A DIFFERENT AREA WHERE THE LOCAL STATIONS ARE NOT THE SAME.

STATION INDICATOR TONE DIAL CONTROL

55 / ''i/. (, IÍql

111111111 _111111111

VOLUME -ON-OFF

VERNIER ADJUSTING SCREW

ADJUSTING SCREW

ENLARGED VIEW OF ADJUSTING SCREW

MANUAL TUNING

ANTENNA HIGH FREQUENCY COMPENSATING SCREW

STATION ADJUSTMENTS) 850 750 710 0 625 540

TO TO TO TO TO 1580KC 1450KC 1380KC 1170KC 1000KC

i


PHILCO PAGE 13-29

NOTE SA rCN WATERS ARE SNOFIN CONNECTED FOR OPIRATION ON COIL U.N. SONDRO ROTORS ARE LOCATED ON UNDERSIDE OF WAF ENS

OET-05C 7E3E1

0 NOTI:- THIS 5100 0F A

1 RF

G40 AD TO C CSC55

OF CAR)

T I F TRANS

4F -4554C

WAVE TRAD 4551TC

M00EL S: L-1760, L- I76E TOP VIEW

11F-OSC 1580 KC

rTUNINO CONO.

;t - 590 KC

LF-OSC

No. Description Part No. Tone Control Knob 57-0922FA8 Push -Button 55-0763 Indicator Dial Strip 55-0792 Drive Cord 55-0793 Dial Scale 55-0844 Bezel Plate 77-0430 Distributor Condenser 30-4404 Gas Gauge Condenser 30-4663 Generator Condenser 61-0040 Water and Oil Gauge Cond 61-0087 Mounting Bracket 57-1107

Bolt 97.0102 Bolt 57-I1540A3 Wing Nut 97-0103FA3 Speaker T3-0039 Pilot Lamp 34-2064 Antenna Lead 95-0110 Upper Insulator 55-0732 Lower Insulator 55-0733 Gland Nut 57-1072 Mounting Bracket 57-l093 Gland Nut Wrench 57-1074

MANUAL .T INC NN9B/

I,000,000n

SOLARI CONTROL ]54000 TOTAL 60,000 TAP

67 19 0 rrf

Dummy Antenna

Ant. Recept. 0.1 mf 4f

Signal Generator

Connection

2ND DET iST AUDIO

766

27,000 n

250rrf

24,0000

REGT -7Y4

I.F= 455 KC.

Signal Generator Frequency

455 kc

Receiver Wave -band

Switch'

Note 1

MODELS L-1760, L-1761

7C5 OUTPUT

10 r f. 2011

4 -

Receiver Dial Trimmer

Setting Number

Note 2 27 25

u x

if 44 41 u 19 44 f4 If IC if 17 41 4r 14 44 27

i" Rg /f 4f if 1f 4f 25 if If If 4f 4f 19 14 If if if K 17 1f 41 1f 14 44 93

Ant. 4 Note 4 1580 kc I4 K 60 4f 1360 kc If 1360 kc 56

ROrOMAT IC' 44 BUT TON 590 kc 4f 590 kc 57 *

1f 1580 kc 4f Note 2 60 4f If 1360 kc If 1360 kc 56 6

Note I.-Press "Rotomatic" Station -Selector button until "DIAL" appears in the window and stations can be tuned in by manual tuning.

Note 2.-Turn condenser rotor plates completely out of mesh as far as they will go. Note 3.-Adjust (9) for minimum output. Noto 4.-When TIRE -COMPARTMENT DOOR antenna is used; connect antenna

lead, part number 95-0120, to the antenna receptacle on the radio. Con- nect an 830 mmf condenser in series between antenna lead and signal - generator. Ground the shield pigtail on the antenna lead to the signal -generator. Be sure antenna switch (3) is turned clockwise.

When COWL antenna is used; connect the antenna lead, part number 95-0120, to the antenna receptacle in the radio. Connect a 45 mmf condenser in series between antenna lead and signal -generator. Ground the shield pigtail on the antenna lead to the signal -generator. Be sure antenna switch (3) is turned counter -clockwise.

Note 5.-When the antenna -stage adjustment is made with the radio installed in the car, the radio antenna lead must be connected to the car antenna in the usual manner. Connect the signal -generator output lead to a wire placed near the car antenna, but not connected to it.

. While rocking.

John F. Rider www.americanradiohistory.com

30 PHILCO MODELS L-1760,

L-1761 PHILCO RADIO & TELEVISION CORP.

MODELS L-1760 and L-1761 The Aerial and Rotomatic adjustments are easily accessible

through the openings in the instrument panel. (See Illustra- tion).

1-Turn the radio set on and allow it to heat for at least TWENTY minutes before starting any adjustments.

2-Press the Rotomatic button until the word "DIAL" appears in the Rotomatic indicator. Tune in a weak station on

the manual dial between 1400 and 1500 k;locycles. Now adjust the aerial screw until maximum volume is obtained. (When the special concealed cowl aerial is used, adjustment should be made with the aerial fully extended.)

VOLUME CONTROL ROTOMATIC ROTOMATIC

BUTTON & OFF -ON SWITCH INDICATOR

07 AERIAL

EIM

z\0^0^0 ) . \(®\ ®\®

I 2 3 4 5 FREQUENCY 550 550 750 900 900 KC.

RANGE 1050 LOSO 1300 1580 1580 KC.

MANUAL MANUAL

INDICATOR CONTROL

AUTOMATIC ADJUSTING SCREWS

3-Select five stations within the frequency range shown

under each set of adjustment screws shown in Illustration.

4-With "DIAL" showing on the Rotomatic indicator, manually tune in the station to he set up on position No. 1 and identify the program.

5-Press the Rotomatic button until No. 1 appears on the Rotomatic indicator. Now adjust the top screw at position No. 1 until the station selected is brought in with loudest volume. Then adjust the slo.ted hex screw at the bottom until maximum volume is obtained. NOTE: Stations of the higher frequencies are tuned in by turning the screws to the left or counter clockwise. Lower frequency stations are tuned by turning to the right or clockwise.

6-Proceed with setting up the remaining four stations in

the same manner as described under Paragraphs 4 and 5.

7-Because there is some detuning of the coils clue to the movements of the cores in adjacent coils, it is necessary to re-

check the adjustments again going back from Position No. 5

to No. 1 and again rechecking from No. 1 to No. 5. This is

important for accurate reception while driving at a distance from the broadcasting stations.

8-This final rechecking of adjustments should be made in

an area of low signal strength in your service station or in

some known "dead" spot where signals can just barely be

heard. 9-Should the Special Concealed Cowl Aerial be installed

after the original installation, it is absolutely essential that the aerial change -over switch be shifted counter -clockwise and also that all automatic adjustments be made again as described in Paragraphs Nos. 1 to 8. inclusive.

PARTS LIST No. Description Part No.

Antenna Choke 65-0168 Condenser (.01 mfd.) 61-0014 Antenna Transformer 65-0306 Cond (.05 mfd.) 30-4569 Resistor (100,000 ohms)... 33-410334 Sensitivity Control

$Resistor (10,000 ohms) e

O O O O O O

R. F. Transformer QQ I. F. Wave Trap Padder

33-310334 65-0305

0 Condenser (25 mmfd.) 33-1108 Resistor (1,000,000 ohms)..33-510234 Condenser (.25 mfd.) 61-0088 Resistor (100,000 ohms)....33-410334 Resistor (27,000 ohms) 33-327334 Condenser (250 mmfd.) 61-0034 Condenser (.1 mfd.) 30-4455 Padder (Pri. 1st I. F. Trans.) First I. F. Transformer 65-0303 Padder (Sec. 1st I. F. Trans.) Condenser (.05 mfd.) 30-4444 Resistor (680 ohms) 33-168334 Resistor (3300 ohms) 33-233354 Condenser (.05 mfd.) 30-4569 Resistor (1.000,000 ohms)...33-510154 Padder (Pri. 2nd I. F. Trans.) Second I. F. Transformer 65-0304 Padder (Sec. 2nd I. F. Trans ) Resistor (25,000 ohms 33-325234 Volume Control (350,000 ohms)

and On -Off Switch 67-0026 Condenser (.01 mfd.) 61-0014 Resistor (50,000 ohms) 33-347134 Condenser (.01 mfd.) 30-4479 Resistor (600 ohms) 33-160334 Condenser (.01 mfd.) 30-4479 Resistor (27,000 ohms) 33-327334 Condenser (.05 mfd.) 30-4444 Resistor (24,000 ohms) 33-324434 Resistor (1,000,000 ohms) 33-510154 Choke 65-0300 Condenser (250 mmfd.) 61-0033 Input Transformer 65-0293 Resistor (82,000 ohms) 33-382334

e Condenser (.02 mfd.) 30-4481 it Filter Cond. (10-20-20 mfd.). 61-0086 e Resistor (300 ohms) 33-130436 +@ Condenser (.02 mfd.) 30-4419 It) Resistor (15,000 ohms) 33-315354 e Tone Control Switch 85-0106 Q Condenser (3000 mmfd.) 30-4469 ll Output Transformer 65-0295 $i Replacement Cone


4) Field Coil Not Replaceable e Wafer Switch 77-0408 83 Antenna Padder Assembly.. 77-0391 ® Tuning Condenser 63-0036 ee First Padder (On Tuning Cond.)....

Low Frequency Padder 63-0037 4) Sil. Mica Cond. (300 mmfd.) 61-0003 e Manual Oscil. Transformer 65-0301 H Second Padder (On Tun. Cond.)....

iCondenser (15 mmfd.) 61.0038 Oscil. Trans. (900-1580 K.C.) 65-0255 Oscil. Trans. (900-1580 K.C.) 65-0255

e Oscil. Trans. (750-1300 K.C.) 65-0256 e Oscil. Trans. (550-1050 K.C.) 65-0257 e Oscil. Trans. (550-1050 K.C.) 65-0257 Q Sil. Mica Cond. (390 mmfd.) 61-0031 H Condenser (250 mmfd.) 61-0033 H Condenser (.5 mfd.) 61-0083

32.1644 O "A" Choke QQ Vibrator Choke Part of ) ® Vibrator 83-0017 Q Resistor (150 ohms) 33-115354 9 Resistor (200 ohms) 33-120354 Qi Condenser (.5 mfd.) 61-0083

Power Transformar 65-0294 Condenser (3000 mmfd.) 61.0059 Resistor (1000 ohms) 33-210554 Condenser (.25 mfd.) 61-0125

0 Resistor (10,000 ohms) 33.310334 ® Pilot Lamps 34-2064

Volume Control Knob 55-0748 Manual Control Knob 55-0750


PHILCO PAGE 13-31

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©John F. Rider


32 PHILCO MODEL C-1808


MODEL C-1808 - ADJUSTMENTS the prescribed frequency, turn the Radio volume control on full end set the signal generator attenuator so that a half scale read - All padding adjustments are carefully made at the factory ending is obtained on the meter. The signal in the speaker should be ordinarily no readjustments are necessary. However, when read -audible but not loud.

justments are required, the procedure given below must be fol- The shieldingon the output in detail. generator ouf ut lead

to the Radio housing. EQUIPMENT-Fully charged heavy duty storage battery or 6 volt power pack, 077 or 177 Philco Signal generator, 027 Philco Vacuum tube voltmeter and set tester or audio output meter, 45-2610 Pad- ding screw driver.

GENERAL-VACUUM TUBE VOLTMETER. The model 027 Vacuum tube voltmeter is an extremely sensitive and accurate test instrument and is recommended for use when aligning and adjusting auto radios. Connect the negative (-) terminal of thé MODEL Vacuum Tube Voltmeter to the high side (ungrounded side) of -the C-1806 volume control. Connect the positive (+) terminal to the radio housing. Connect the "AC" cord to e 110 volt AC socket. Press the VTVM button and the IO volt button. Turn the "Set Zero Ohms - VTVM" control clockwise until a click is heard. Allow the tubes to heat up for a few minutes. Short the 150 meg. VTVM termînels and adjust the "Set Zero 150 meg." control until thé meter reads zero on the 0-10 range scale (bottom scale). The needle will deflect from left to right.

AUDIO OUTPUT METER. If an audio output meter is used, connect the leads across the voice coil of the speaker. Use the 0-30 volt scale.

..A,,,.. x+cv+ - 580 KC

must be connected

IYgvF ragp OSs,e'C rufe eurnr lo,. +fY re.

TONI revere ra.,roa cane.

OPERATION SIGNAL GENERATOR

1

2

3

4

5

6

7

FREQUENCY CONNECTION DUMMY CAPACITY SPECIAL INSTRUCTIONS ADJUST

PADDER

455 K.C.

455 K.C.

1400 K.C.

580 K.C.

1400 K.C.

580 K.C.

PRESS THE "DIAL" BUTTON AND STATIONS CAN BE TUNED IN BY "DIAL" TUNING







1 Mfd.

.1 Mfd.

See Note I

See Note I

See Note I

See Note I

Note 2

Note 2

Set Tuning Control at 1400K.C.

Set Tuning Control at 580 K.C.

Set Tuning Control at 1400 K.G.

Set Tuning Control at 580 K.C.

Make all adjustments for maximum reading on the meter.

NOTE I-Connect the aerial lead, Part No. 95-0111, to the aerial receptacle in the radio. Connect a 25 Mmfd. Condenser in series between the signal generator and the aerial lead.

NOTE 2-Turn the tuning control clockwise as far as it will go.

NOTE 3 -Rock the tuning control while adjusting the low frequency screw. Tune the control to the signal and adjust the

INSTRUCTIONS FOR SETTING

I. Turn on the radio and allow it to operate tor twenty minutes or longer if possible. All adjustments MUST be made with the aerial fully extended. Turn the volume control on full and set the tone control on voice. In metropolitan areas it is best to adjust the push buttons in a shielded building or under a viaduct.

2. Push in the DIAL button so that stations can be tuned in by manual tuning and tune in a weak station around 1400 K.C. on the dial. Then adjust the aerial padder (®) for maximum signal.

3. Select the five stations which you desire to use on push button tuning. Tune in a station between 535 and 1000 Kilocycles.

I

Note 3

Note 4

T Note 3

screw for maximum output. Kotate the tuning control' back and forth slightly for maximum output. Then readjust the screw for maximum output. Repeat this procedure until no further improvement is noticed.

NOTE 4-When the aerial stage adjustment is made with the Radio installed in the car, the Radio aerial lead must be connected to the car aerial in the usual manner. Connect the signal generator output lead to a wire placed near the car aerial but not connected to it.

UP ELECTRIC PUSH BUTTONS

Remove the No. I push button cover and push in the No. I button. Using a coin or a small screw driver, adji st the button until the station selected is tuned in with the loudest volume. Turning the button counter -clockwise will increase the frequency, and clockwise will decrease the frequency. Check the station by pushing in the DIAL button again to identify the program.

4. Proceed in the same manner for adjusting No. 2, No. 3, No. 4 and No. 5 buttons.

The stations may be set up before installing the radio in the car, but the final adjustments must be made after installation of the radio and connected to the aerial in the car.


PHILCO PAGE 13-33

MODEL S-1824

PHILCO RADIO & TELEVISION CORPStudebaLer "Custom"

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34 PHILCO MODEL S-1824 Studebaker "Custom"


MODEL S-1824 - ADJUSTMENTS All padding adjustments are carefully made at the factory and

ordinarily no readjustments are necessary. However, when readjustments are required, the procedure given below must be followed in detail.

EQUIPMENT- Fully charged heavy duty storage battery or 6 volt power pack, 077 or 177 Philco Signal generator, 027 Philco Vacuum tube voltmeter and set tester or audio output meter, 45-2610 Pad- ding screw driver.

GENERAL-VACUUM TUBE VOLTMETER. The model 027 Vacuum tube voltmeter is an extremely sensitive end accurate test instrument and is recommended for use when aligning and adjusting auto radios. Connect the negative (-) terminal of the Vacuum Tube Voltmeter to the high side (ungrounded side) of the volume control. Connect the positive (+) terminal to the radio housing. Connect the "AC" cord to a 110 volt AC socket. Press

the VTVM button and the 10 volt button. Turn the "Set Zero Ohms -- VTVM" control clockwise until a click is heard. Allow the tubes to heat up for a few minutes. Short the 150 meg. VTVM terminals and adjust the "Set Zero 150 meg." control until the meter reads zero on the 0-10 range scale (bottom scale). The needle will deflect from left to right.


With the Radio and signal generator set up for operation at the prescribed frequency, turn the Radio volume control on full and set the signal generator attenuator so that a half scale reading is obtained on the meter. The signal in the speaker should be audible but not loud.

The shielding on the generator output lead must be connected to the Radio housing.

7Y4 TUBE II, ECT612Il,

44

TAU TUBE OUTPUT

esTueE 2LETRANs VlRATOR ZDET.

It' AUDIO

7A7TUBE 39 R.F.

G

3T

'7A7 TURF (íe n71.FTRANS.7

OPERATION

SIGNAL GENERATOR DUMMY CAPACITY SPECIAL INSTRUCTIONS

ADJUST PADDER

FREQUENCY CONNECTION

1 455 K.C. To Aerial Receptacle on Radio See Note I Note 2

2 1360 K.C. To Aerial Receptacle on Radio See Note I Set Tuning Control at 1360 K.C.

3 590 K.C. To Aerial Receptacle on Radio See Note I Set Tuning Control at 590 K.C. Note 3

4 1360 K.C. To Aerial Receptacle on Radio See Note 1 Set Tuning Control at 1360 K.C. ir;'

5 1200 to

1400 K.C. Note 5 Note 5 Note'S

Note 4


NOTE I -Connect the aerial lead, Pert No. 95-0111, to the aerial receptacle in the radio. Connect a 35 Mmfd. Condenser in

series between the signal generator and the aerial lead.

NOTE 2-Turn the tuning control clockwise as far es it will go.

NOTE 3- Rock the tuning control while adjusting the low frequency screw. Tune the control to the signal and adjust the screw for maximum output. Rotate the tuning control back and forth slightly for maximum output. Then readjust the screw for

maximum output. Repeat this procedure until no further improvement is noticed.


NOTE 5-When installing the radio in the car, follow the in-

stallation instructions carefully. Tune in a weak broadcast signal between 1200 and 1400 Kilocycles on the control scale. Remove the plug button on the end of the radio and adjust the aerial compensator Q (see Figure 3) for maximum signal.


PHILCO PAGE 13-35

P,.-CDEL S-1722 PHILCO RADIO & TELEVISION CORP.

S-1722 INSTALLING CALL LETTERS

Before installing the Receiver, the Call Letters of the stations which are to be tuned in automatically must be inserted in the Automatic Dial. See Illustration,'Models S-1622, S-1722. Select and remove from the Call Letter Sheets, the Call Letters of five popular stations received in the area in which the radio is to be operated and that come within the frequency range of the adjusting screws as shown in Illustration Models S-1622, S-1722. Each of the adjusting screws cover the portion of the broadcast band as indicated in Illustration, Models S-1622, S-1722. It is important, therefore, that only such stations be selected as can be tuned in in the range as covered by each screw.

Push the Automatic Station Selector until the word "DIAL" is at the front. This is the starting point. Push the Automatic Station Selector once more and the first position of the dial will be at the front. Insert in this position the call letter tab of the station having the highest frequency in kilocycles. In- sert in back of each tab one of the clear celluloid tabs. Press the Automatic Station Selector button once more and insert the call letters of the station with the next highest frequency in kilocycles in the second position.

a)

CALL LETTER TAB

AUTOMATIC DIAL

Installing Call Letter Tabs

EXAMPLE-The first position may have the call letters of a station operating on 1400 kilocycles; the second position, a station operating on 1050 kilocycles, etc. Repeat this procedure until all five call letter tabs selected are inserted in the dial in the order of their frequency. Be sure and record the call letters with respect to their position on the dial for use in setting up the adjusting screws.

1-Turn the Receiver on and allow it to operate for TWENTY minutes. Remove the cover plate over the automatic tuning adjusting screws. This plate is on the front of the Receiver and is removed by removing two screws.

2-Push the Automatic Station Selector button until the word "DIAL' is at the indicator window. Tune in the station whose call letters are in the first position on the dial (the highest frequency station) and note the program. Push the Automatic Selector button once and this station's call letters will appear at the indicator window.

UPPER

LOWER

!ti. ̀ : ,i .'_ .'_ -ii`%;: :-ï.-' - -

¡ . - 11 ' l;i ri.i: :h:, r k ..

.. r

1oIi91580 KC

750-1300 KC 550-1000 KC

550-1000 KC

3-With a small screwdriver, turn the No. 1 adjusting screw (See Illustration, Models S-1622, S-1722) in the lower column, to the right or left until this station is tuned in. Now adjust the corresponding screw in the upper column until maximum volume is obtained. Make these adjustments carefully, as it may be easy to pass by the loudest point on some stations.

When adjusting for Automatic Tuning on strong local stations the antenna rod should be all the way down and the adjustments made with the car in a shielded area, such as in a steel constructed building or under a viaduct. This is necessary in order to obtain a weak signal so the adjustments can be accurately made.

4-Press the Automatic Station Selector button until "DIAL" again is at the indicator window and tune in the station whose call letters are in the second position on the automatic dial (the next lowest frequency). Press the automatic button two times and adjust the number 2 set of adjusting screws.

Repeat this procedure until each pair of the five pairs of adjusting screws has been tuned to its respective station.

IT IS NECESSARY THAT THE SETTING OF THE AD- JUSTING SCREWS BE REPEATED TO BE SURE THEY ARE PROPERLY SET SO THAT MAXIMUM PERFORM- ANCE MAY BE HAD.

Be -sure and save the unused call letters giving them to the owner as they may be needed at some future time if the radio is to be operated in a different area where the local stations are not the same.


36 PHILCO MODEL S-1625 Studebaker "Custom"


ñ 7.

rem, THIS SIDE OF Ä BATTERY GROUNDED TO GASL (FRAME Or CAR)

PARTS LIST - S-1825 No. Description Part No. rer Antenna Choke . 65-0318 litä)Antenna Padder 63-0053 O Antenna Transformer 65-0349 0: Iron Core 57-1541 O Resistor (1,000 ohms) ..33-210334 O Condenser (.05 Mfd.) 61-0101 e Condenser (.05 Mfd.) 61-0111

T Resistor (10,000 ohms) .33-310334 el Condenser (250 Mmfd.) .60-125157

Resistor (68,000 ohms) .33-368154 Condenser (.05 Mfd.) 61-0101 e Pilot Lamp 34-2064 e Condenser(100 Mmfd.) ..60-110327

® R. F. Transformer 65-0359 ea Iron Core 57-1541

Fodder 63-0055 (3j Condenser (.05 Mfd.) 61-0111 ® Resistor (680 ohms) ...33-168336 it Condenser (110 Mmfd.) .60-110157 e Condenser (54.5 Mmfd.) .61-0149 Is Resistor (100.000 ohms) 33-410154 g Padder 63-0052 ® Resistor (150 ohms) ...33-115336 g Condenser (.05 Mfd.) 61-0111 á4 Condenser (215 Mmfd.) 61-0148 g Oscillator Transformer 65-0350 ea Iron Core 57-1542

g Condenser (250 Mmfd.) .80-125157 Resistor (22,000 ohms) .33-322334

g Series Tracking Transformer 65-0351 ea Series Tracking Core 57-1659 e' Resistor (68,000 ohms) .33-368334 e Condenser (.1 Mfd.) 61-0113

AResistor (4,700 ohms) .33-247434 Reslstor(1,000,000 ohms) 33-510154

g Padder (Prl. 1st I. F. Trans.) First I. F. Transformer 65-0352

g Padder (Sec. 1st I. F. Trans )

6A Padder (Pri. 2nd I. F. Trans )

9 Second I. F. Transformer 65-0353 (i1) Padder (Sec. 2nd I. F. Trans.) t3 Resistor (25,000 ohms) .33-325154 A Volume

On --Off Switch (350,000 ohms)

e Condenser (6,000 Mmfd.) 61-0103 Nb Condenser (.01 Mfd.) 61-0110

e Resistor (22,000 ohms) .33-322154 Resistor

(15.000.000 ohms) -.33-615154 8 Condenser (6.000 Mmfd.) 61-0155

e Tone Control Switch 85 0126 e Condenser (110 Mmfd.) ..60-110157

No. Description Part No. OD Resistor (220,000 ohms) 33-422334

Condenser (.01 Mfd.) 61-0100

e Resistor (470,000 ohms) 33-447154 Filter Condenser

(10-20-20 Mfd.) 61-0072 el Resistor (470 ohms) ....33-147436

;g

Condenser (.01 Mfd.) 61-0124

0 Output Transformer 65-0364 Field Coil Not Replaceable

ea Cone & Voice Coll 91-0166 e Jumper 57-1121

Test Socket 55-1078 63, Resistor (1,000 ohms) .33-210434

Condenser (5,000 Mmfd.) 61-0153 A Power Transformer 65-0347 e Resistor (100 ohms) ....33-110434 n Resistor . (100 ohms) ....33-110434 e 83-0027 e 61-0137 A 65-0151 e 32-1604 e 63 f 32-1644 r3 61-0137 B 45-2559

57-1623

Vibrator Condenser (.5 Mfd.) Vibrator Choke Filament Choke Condenser (250 Mmfd.) .60-125157 Condenser (250 Mmfd.) .60-125157 Condenser (250 Mmfd.) .60-125157 "A" Choke Condenser (.5 Mfd.) Fuse Manual Knob Sleeve Manual Knob Spacer 57-1689 Manual Knob Spring ..57-1628FA3 Manual Knob Skirt 55-1081 Manual Knob 55 1067 Tone & Volume Knob 77-0633 Sneaker Cable 95-0161 Screw (Cover Mtg.) ..W-2212mr,88 Tube Side Cover ... Wiring Side Cover ... Sneaker Unit Sneaker Gasket Bezel Front Sneed Nut pia)

Gland Nuts Rousing Vibrator Socket Tube Socket Push Button Knob Tuning Switch Coil Form Spring Coil Form Screw Core Draw Bar Spring

.57-1547FC54

.57-154RFr'54 73-0053 55-1045.

57-15R1F48 97-O13RFR7

55-1012 28-855RF.A8 Description

2ND. OCT. 1ST AUDIO .GHi1 OUT T

Y4TUBE RECTIFIER

766TU6E 2' 0 T.

SI" IUOIO , eO® 7A7T`6E T)

m®mm®mm TONE

CONTROL

PUSH GUTTON CONTROL

MANUAL TURING INTROI.

essit GUTTON ONTROL

ge I 2 1Íi'

Mm® ,mom0000 ® 7DSTU6E

OUTPUT

Part No. 77-O6ROP'C54 Latch Bar Spring 57-1650

27-6153 Push Bar Spring 57-1651 27-6151 Pointer Spring 57-1653 77-0612 Pointer & Cam Assembly 77-0647

97-111285 57-1840

Gland Nut Wrench ....28-5636FA3 97-0126 Generator Condenser 30-4007

....57-1649 Distributor Resistor 30-2250

53 7A7 TUBE 766Tu6E vOLUME R. DET.03C. CONTROL S.

'A' SWITCH

No. Description Distributor Condenser Fuel Gauge Resistor Ground Strap Wiring Nut

(Radio Mtg.) Hook Bolt

(Radio Mtg.)

Part No. ...60-125157

67-0041 77-0336

97-0048FA3

97-0135FA3


PHILCO PAGE 13-37

=

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MODEL S-1826 PHILCO RADIO & TELEVISION CORP. Studebaker "Custom"

(

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L

PARTS LIST - S-1826 Part No. No.

L Antenna Choke 65-0378 s)) Antenna Padder 63-0053

Antenna Transformer 65-0349 Iron Core 57-1541 Condenser (.05 Mfd.) 61-0111 Resistor (680 ohms) ....33-168334 Condenser (.05 Mfd.) 61-0111 Resistor (68,000 ohms) .33-368154 Resistor (10,000 ohms) .33-310334 Condenser (250 Mmfd.) :60-125157

® Resistor (68,000 ohms) .33-368154 ® Condenser (100 Mmfd.) .60-110157 ® R. P. Transformer . 65-0359

a Iron Core 57-1541 Padder 63-0052 Resistor (100,000 ohms) 33-410154 Condenser (110 Mmfd.) .60-110157

® Condenser (215 Mmfd.) 61-0148 ®Sensitivity Control 67-0036 Condenser (.05 Mfd.) 61-0111 Condenser (.05 Mfd.) 61-0111

® Condenser (.05 Mfd.) 61-0101 ® Padder 63-0055 ® Resistor (22,000 ohms) .33-322334 A Condenser (250 Mmfd.) .60-125157 ág Oscillator Transformer 65-0350 ea iron Core 57-1542 ® Resistor (150 ohms) ....33-115336 g Condenser (.05 Mfd.) 61-0111 g Condenser (54.5 Mmfd.) 61-0149 ® Oscillator Tracking Trans. 65-0351 ea Oscillator Tracking Core 57-1659 ® Padder (Pd. lot I. F. Trans )

® First T. F. Transformer 65-0352 Padder (See. 1st I. F. Trans )

A Resistor (27,000 ohms) .33-327434 ® Resistor (1,000,000 ohms) 33-510154 ® Padder (Pd. 2nd I. F. Trans.) g Second I. F. Transformer 65-0410

Padder (Sec. 2nd T. F. Trans )

® Resistor (25,000 ohms) .33-325154 ® Resistor (470 ohms) ..33-147336 ® Volume Control (350,000 ohms)

& On -OR Switch 67-0037 19 Muter Switch 85-0125

Condenser (.01 Mfd.) 61-0100 ® Resistor

(10,000,000 ohms) ..33-610154 g Condenser (.25 Mrd.) 61-0151 ® Condenser (.07 Mrd.) 61-0152 i3. Condenser (110 Mmid.) ..60-110157

i® Condenser (4,000 Mmfd.) .61-0129 Resistor

(10.000,000 ohms) ..33-610154 Fß Resistor (220,000 ohms) 33-422334 ® Condenser (.01 14Rä.) 61-0100

No. Description

o o O o o O o o

FOR ALIGN))LENT SEE INDEX

Description Part No.

(9 Resistor (220.000 ohms) 33-422334 Pone Control

(4,000,000 ohms) 67-0038 ® Condenser (.5 Mrd.) 61-0134 ® Resistor (4,700 ohms) ..33-247154 ® Resistor (1,500 ohrn8) ..33-215154 ® Condenser (.1 Mfd.) 61-0113 ® Filter Condenser

(5-10-20-20 Mfd.) 61-0150 Resistor (4,700 ohms) ..33-247434. Condenser (.05 Mrd.) 61-0122 Resistor (220,000 ohms) 33-422334

QResistor (470,000 ohms) 33-447154 Resistor (470,000 ohms) 33-447154

® Condenser (.05 Mrd.) 61-0101 ® Resistor (330 ohms) ....33-133436 ® Condenser (.01 Mrd.) 61-0124 ® Output 'transformer 65-0409 9 Field Coil Not Replaceable ea Cone & Voice Coll

(Icor 73-0052-2 Speaker) 91-0164 (For 73-0052-3 Speaker) 91-0165 3 Jumper 57-1121

E3 Test Socket 55-1078 Resistor (1,000 ohms) ..33-210434 Condenser (5.000 Mmfd.) 61-0153 Power Transformer 65-0358 Resistor (100 ohms) ...33-110434'

® Resistor (100 ohms) ...33-110434 ® Vibrator 83-0027

Condenser (250 Mmfd.) .60-125157 Condenser (.5 Mrd.) 61-0137 Vibrator Choke 65-0151 Condenser (250 Mmfd.) .60-125157 Condenser (250 Mmfd.) .60-125157 Condenser (.5 Mfd.) 61-0137 "A" Choke 32-1644 Fuse 4 2559, Solrnnid 65-0360 Solenoid Switch ....l'art of 85-0125 Pilot Lamp 34-2064. Description Tarring 8t Volume Knob 77-0633 Speaker Casket Honk Bolt (Radio Mtg.) 97-0135FA3 Speaker Cable Wing Nut (Radio Mtg.) 97-0048FA3 Speaker Unit Gland Nut Wrench ..28-5936FA3 Vibrator Socket Condenser (Generator) ..30-4007 Tube Socket

3 ®

A A

A A A A A

Ä LEAD 7Y4 TUBE

7B6TUBE MIME 7A7TUBC TOwf rNPDET.ISAUpO OCT OSC.. I f tOUT

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ICS ICS TUBO 1AE1 OUTPUT OUTPUT DRIVER

Part No. 55-1045 95-0161 73-0052 27-6153 27-6151

Condenser (Distributor) .80-125157 Manual Knob Spacer 57-1669 Distributor Suppressor ....32-2250 Manual Knob 55-1067 Ground Strap 77-0336117anual Knob Sleeve 57-1623 Furl Gauge Resistor 67-0041 Manual Knob Spring ..57-1628FA3 Front Bezel 57-1549FA8 Manual Knob Skirt 55-1061 Speed Nut (Bezel Mtg.) 97-0136FET Claud Nut 28-6558FA8 Color Disc Assembly - R. P. 57-1538 Tuning Switch 77-Oú00T70646 Core DrawCoil BarSpring Spring .....57-1649 Dial 55 1012 Latch Rar Spring 57-1650 Push Button Knob 77-0612 Push Button Spring 57-1651

Muter Spring 57-1652

No.

PUSH

B TTON

CONTROL.

MANUAL CONTROL

Push SUTTON

A Di USTINS CONTROL

cl 1570RF.TUBO J © VOLUM CONTROL 6

OU -Ort SWITCH

PUSH SUTTON}

Description Part Ne. l'oinh-r Spring 57-1653 Pointer & Cam Assembly 77-0647 Screws (Bezel Mtg.) ..97-0111FA26 Screw (Corer Mtg.) ...W2212FA26 Housing & Bracket Assembly

(Ludington Green) . 77-0660FC54 Housing & Bracket Assembly

(English Grey) .... 77-0080FC55 Wiring Side Cover

(Ludington Green) . 57-15488'054 Wiring Side Cover

(English Grey) .... 57-1548FC55 Tube Side Cover

(Ludington Green) . 57-1547FC54 Tube Side Cover

(English Grey) .... 57-1547FC55


38 PHILCO MODEL S-1625 PHILCO RADIO & TELEVISION MODEL S-1826MCDEL P-1635

EQUIPMENT- Fully charged heavy duty storage battery or 6 volt power pack, 077 or 177 Philco Signal generator, 027 Philco Vacuum tube voltmeter and set tester or audio output meter, 45-2610 Pad- ding screw driver.

GENERAL-VACUUM TUBE VOLTMETER. The model 027 Vacuum tube voltmeter is an extremely sensitive and accurate test instrument and is recommended for use when aligning and adjusting auto radios. Connect the negative (-) terminal of the Vacuum Tube Voltmeter to the high side (ungrounded side) of the volume control. Connect the positive (+) terminal to the radio housing. Connect the "AC" cord to a 110 volt AC socket. Press the VTVM button and the 10 volt button. Turn the "Set Zero Ohms - VTVM" control clockwise until a click is heard. Allow the tubes to heat up for a few minutes. Short the 150 meg. VTVM terminals and adjust the "Set Zero 150 meg." control until the meter reads zero on the 0-10 range scale (bottom scale). The needle will deflect from left to right.


With the Radio and signal generator set up for operation at the prescribed frequency, turn the Radio volume control on full and set the signal generator attenuator so that a half scale reading is obtained on the meter. The signal in the speaker should be audible but not loud.

The shielding on the generator output lead must be connected to the Radio housing.

CORP.

AERIAL COMP. /360 /CC o

MODEL 5-/825, .5-1826 TOP VIEW

/F Z70 KC

o.

i

o

o

OSC. 1600KC

RF /960 KC.

Ll OSC. 590 KC

OPERATION SIGNAL GENERATOR

DUMMY CAPACITY SPECIAL INSTRUCTIONS ADJUST PADDER FREQUENCY CONNECTION

1 PUSH IN THE TUNING CONTROL KNOB BY MANUAL

UNTIL STATIONS CAN BE TUNED IN TUNING

2 270 K.C. To Aerial Receptacle on Radio See Note I Note 2 ®®®® e'ï ee 3 1600 K.C. To Aerial Receptacle on Radio See Note I Set Tuning Control at 1600 K.C.


5 590 K.C. To Aerial Receptacle on Radio See Note I Set Tuning Control at 590 K.C. ee Note 3

6 1600 K.C. To Aerial Receptacle on Radio See Note I Set Tuning Control at 1600 K.C.


8 1200 to

1400 K.C. Note 5 Note 5 Note 5

Note 4


NOTE I -Connect the aerial lead Part No. 95-01 I I, to the' aerial receptacle in the radio. Connect a 35 Mmfd. Condenser in series between the signal gnerator and the aerial lead.

NOTE 2-Turn the tuning control clockwise as far as it will go.

NOTE 3 - Rock the tuning control while adjusting the low frequency screw. Tune the control to the signal and adjust the screw for maximum output. Rotate the tuning control back and forth slightly for maximum output. Then readjust the screw for

INSTRUCTIONS FOR SETTING UP THE

Turn on the radio and allow it to operate for twenty minutes

or longer if possible. Press in any automatic button so that it remains engaged.

Then tune in the station desired by turning the small wheel in the

button. The station can be identified by the pointer, which in-

dicates the frequency of the station in Kilocycles. The automatic buttons may be readjusted to any station within the range of the

broadcast band. The automatic buttons may be readjusted to

maximum output. Repeat this procedure until no further improvement is noticed.


NOTE 5-When installing the radio in the car, follow the installation instructions carefully. Tune in a weak broadcast signal between 1200 and 1400 Kilocycles on the control scale. Remove the plug button on the end of the radio and adjust the aerial compensator O2 (see Figure 3) for maximum signal.

AUTOMATIC TUNING BUTTONS stations in any sequence desired. However, for convenience in remembering stations, it is recommended that the buttons be set up in the same order that the stations appear across the dial.

CAUTION - All adjustments must be carefully made so that reception can be received best when remote from the broadcasting station. Careless tuning off to one side, even though the signal is

heard, will result in distorted reception.


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PARTS LIST - P-1835

No. Description Part No. I Antenna Choke 65-0378 s Antenna Padder 63-0054

Q Antenna Transformer 85-0340 ®a Iron Core 57-1541 l) Condenser (.05 Mfd.) 61-0111 ® Resistor (680 ohms) .,,33-168334 ® Condenser (.05 Mfd.) 61-0111 Q Resistor (68,000 ohms) .33-368154 CS) Resistor (10,000 ohms) .33-310334 s® Condenser (250 Mmfd.) .60-125157 ® Resistor (68,000 ohms) .33-368154 3) Condenser (100 Mmfd.) .60-110321 ® R. F. Transformer 65-0359 @a Iron Core 57-1541 ® Padder 61-0055

O Resistor (100.000 ohms) '33-410154

3) Condenser (110 Mmfd.) .60-110157 Condenser (215 Blmfd.) 61-0148

@ Sensitivity Control 67-0036 ® Condenser (.05 Mrd.) 61-0111 ()j Condenser (.05 Mfd.) 61-0111 ® Condenser (.05 Mfd.) 61-0101 ® Padder 61-0052

Resistor (22,000 ohms) .33-322334 Condenser (250 Mmfd.) .60-125157 Oscillator Transformer 65-0367 Irón Core 57-1542 Resistor (150 ohms) ....33-115336 Condenser (.05 Mrd.) 61-0111 Condenser (54.5 Mmfd.) 61-0149 Oscillator Tracking

Transformer 65-0351 Oscillator Tracking Core 57-0996 Padder (Pri. 1st I. F. Trans )

First I. F. Transformer 65-0352 Padder (See. 1st I. F. Trans ) Resistor (27,000 ohms) .33-327434 Resistor(1,000,000 ohms) 33-510154 Padder (Pri. 2nd I. F. Trans.) Second I. F. Transformer 65-0353 Padder (See. 2nd I. F. Trans.) e

Resistor (25,000 ohms) .33-325154 Resistor (470 ohms) .33-147330 Volume Control (350,000 ohms)

& Tone Control & On -Off Switch 67-0035

Muter Switch 85-0125 Condenser (.01 Mfd.) 61-0100 Resistor

(10,000,000 ohms) ...33-610154 Condenser (.25 Mfd.) 61-0151 Condenser (.07 Mfd.) 61-0152 Condenser (110 Mmfd.) ..60-110157 Condenser (4.000 Mmfd.) 61-0129

No. Description Part No. 4.. Resistor

(10,000,000 ohms) ..33-610154 ® Resistor (220,000 ohms) 33-422334 ® Condenser (.01 Mfd.) 61-0100 ® Resistor (220,000 ohms) 33-422334 ® Tone Control

(4,000,000 ohms) ....Part of Condenser (.5 Mfd.) '65-0134 Resistor (4,700 ohms) ..33-247154 Resistor (1,500 ohms) ..33-215154 Condenser (.1 Mfd.) 61-0113 Filter Condenser (5-10-20-20 Mfd.) 61-0150

Resistor (4,700 ohms) ..33-247434 Condenser (.05 Mfd.) 61-0122

® Resistor (220,000 ohms) 33-422334 @ Resistor (470,000 ohms) 33-447154 Q Resistor (470,000 ohms) 33-447154 ® Condenser (.05 Mfd.) 61-0111 @ Resistor (330 ohms) ....33-133436 @ Condenser (.01 Mfd.) 61-0124 @ Output Transformer 65-0354

Field Coil Not Replaceable @a Cone & Voles Coil


Q Jumper 57-1121 @ Test Socket 55-1078 @ Resistor (1,000 ohms) .33-210434 ® Condenser (5,000 Mmfd.) 61-0153 QI Power Transformer 65-0347 ® Resistor (100 ohms) ....33-110434 ® Resistor (100 ohms) ....33-110434 6) Vibrator 83-0027 ® Condenser (250 Mmfd.) .60-125157

®Condenser (.5 Mrd.) 61-0137 Vibrator Choke 65-0151

® Condenser (250 MmM.) .60-125157 @ Condenser (250 Mmfd.) ..60-125157 6i Condenser (.5 Mfd.) 61-0137 @ "A" ^woke 32-1644 @ Fuse 45-2559

Solenoid 65 0360 ® Solenoid Switch ...Part of 85-0125

Pilot Lamp 34-2064 Front Bezel 57-1550F.48 Color Disc Assembly 77-0649 Coupling & Key Assembly 77-0651 Tuning Switch only 77-0601 R. F. Transformer Spring 57-1538 R. F. Transformer Mtg.

Screw 97-0126 Core Draw Ear Spring 57-1649,

soLONOIO sw,TtL

coLiEN»ION 7A7

Xlq, ¡l' I

IF PEAK 270 KC LAO,

VIBRATOR

7B6

PHILCO PAGE 13-39

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MODEL P-1635 Packard

766 TUBE 2"."0tT I Vossia , 747 TUBE I.F.

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CLIP

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`1737 PLUS

VOLUME TONE CONTROL,

CONTROL

Description Part No. Latch Bar Spring 57-1650 Push Button Spring 57-1651 Push Button Knob 77-0613 Muter Spring 57-1652 Pointer Spring 57-1653 Pointer & Cam Assembly - 77-0650 Dial 55-1034 Tuning & Volume Knob 77-0643 Tone Lever 57-1559FA8 Manual Return Spring 57-1620FA3 3Speaker Gasket 55-1037 Speaker Unit 73-0050 Speaker Cable 95-0161

PUSH

BUTTON

ADJUSTING

CON

PUSH

moss

TUNING CONTROL

Description Part Ne. Vibrator Socket 27-6153 Tube Socket 27-6151 Wick Bolt (Radio Mtg.) 57-1560FA3 Wing Nut (Radio Mtg.) ..W895FA3 Ignition Switch Condenser 30-4001 Generator Condenser 30-4475 Distributor Resistor 33-1196 Screw (Bezel Mtg.) .97-0111FA4 Speaker Cover & Bracket 77-0663' Tube Side Cover 57-155418C51 Speed Nut (Dial Mtg.) 97-0137FE7 Rousing & Bracket 77-0662FC51 Screw (Cover Mtg.) W-2212FA26


40 PHILCO ù10DEL F-1841 Ford "Custom"

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PHILCO PAGE 13-41

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42 PHILCO

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PILOT PAGE 13-1

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:e. -oa°,E CmE4:1s


PILOT PAGE 13-5

PILOT RADIO CORP.

A

005 600V 22 -II

t1' PEAK 455 KC 12SÁ7

300M4.J-Mlw RF CHOKE 12.25h. 75-1 20-25

BC.ASW OSC. COIL

72-15

LOOP ANT 74-8 100M 30 163

.002-600V. 22-6

Phono Pickup Ì

Turntable

ALL RESISTORS ARE 1/4 WATT UNLESS OTHERWISE SPECIFIED

G- GANG CONDENSER 26-9 P- TRIMMERS ON GANG T- TRIMMER CONDENSERS S- BAND SWITCH 100-10 SHOWN IN

SW POSITION RADIO- PHONO- TONE SWITCH SHOWN IN EXTREME COUNTERCLOCKWISE POSITION (Ho.1)

No I-RADIO VOICE No -2- - TREBLE

No.4-PHONO BVOICE

No 6- - BASSEE

BC OSC PADDER 27-8

IF --- .5- 200V 22-43

)000pM aa MIca

20-40 100 µpJ

aaa Meca 20-14

11 ppKII'

500M 30-1923500joyj Paper

22-55 1-600V. 22-37

AC. -0C

12SK7

RADIO -PHONO -TONE SWITCH 100 -II

M 30-78

200V.

2 Meg. 30-204

S pJ.M.ca 400 JMlca - 2.-5

273-24

500M 30-I92 1--JN/WN/W-

35L6GT

05-400V

250MM1 Mca 20-22

005-200V 22-9

HEATERS

DIAL INDICATOR LIGHTS BroWnBead 6W 150Ma.

SWITCH ON VOLUME CONTROL

05-y600V.

22-31

BOTTOM VIEW OF 8Á1Á4T TUBES 117 VOL Tg as al 13OVOLTS aras ($O VOLTS T1 -ea

1. aaaTTa oSautTs

2-30

MODEL TP -31

01-G(Ov 22-IB j 1

B PM Speaker

41 -II

g ó i föDoó

I

^-F^'

Filter Choke

PILOT RADIO CORP Long Island C ily, N Y . LISA

Schematic Di çç am Model TP-31

Drawn by (//Date II -1540 Checked 046II Dr9wg No Approvedby`.I 0-22

PHONOGRAPH OPERATION

IT IS IMPORTANT THAT THE SWITCH AT THE REAR OF THE CABINET IS IN THE POSITION CORRESPONDING TO THE TYPE OF LINE CURRENT BEING USED.

The motor is controlled by the automatic stop lever which is at the rear right side of the turntable. The lever protruding from under the turntable on the front side is the speed control. For true reproduction the speed should be adjusted to '78 revolutions per minute. Volume for both, "Phono" and "Radio" is regulated by the same control on the front of the receiver.

The toue control and phono radio switch must be in either of the three -clockwise positions for phonograph operation.

SERVICE NOTES The screws for adjusting both the R.F. and I.F. amplifiers of this re-

ceiver, together with the frequencies at which they should be adjusted, are all pictured on the above diagram. When aligning the I.F. amplifier, the generator must be -connected to the grid of the 12SK7 R.F. tube through a .1 mfd condenser. When aligning the receiver, first align the shortwave band connecting the generator to the antenna post with a 400

ohm resistor. Then align the broadcast band using a .0002 mfd. condenser.

When aligning the loop, the receiver should be in the cabinet with the back in place. The adjusting condenser can be reached through the slot in the lower left hand side of the back.

/2SK7

2SOA7 CO

O OD

O

/ó

AO

BO

O /2Sk7

CI 35zOS6T BALOLAST

iC)/P

QWNG CONDENSER

/2507

o

F/LTFR C/Á)RE

TOP VIEW OF CHASSIS

SPEAKER SOCKET

0/ LOOP SOCKET

0`.E L/NE CIAQD

e5)

,PEA,P V/E{Y OF CNFISS/S

tit t' /23 45 CgL/2112477eW HOLES

D/qL PLATE T.P/MMERS -4SSh'C 11-04,V7 SW 210 MC B-OSC SW 240Mc

' C-OSC BC /400 MC D-OSC PAQOER 6010KC E-LLaOPANT /400KC 0/AZ PLA7E /-S7NRT-536'KC

12 60 MC 3 600MC 4 /400 KC 5 2ro MC

TUN/NG RANGE BROADCAST RANGE 535-/720 KC OR 56/ 70 /74 METERS SNORT WAVE BANG 5 6 77::, 240 METERS 02 53 6 70 240 METERS Ore /2 5 METERS


6 PILOT

I2SA7 12557 300 pp/ Mme 12.2MILR.EChace IOOyY/.Mi4 20-25 75-1 20-14

MODEL TD -42 MODEL 1424 Phono PILOT RADIO CORP.

IF PEAK 455 KC

1215.7

o

83110-C

.005-600V

LOOP ANT. 74-8

.003 5- 200V. 22-55

I.W I/2

32-6 273 2

I 43:01 I I L- _yJ>rv

IF4551.

IT

RADIO -ITCH PHON100-12O-TONE SW

VHwed FrpnReer O Front of

V 3

e Waer T v .'r BJIIO-A 15 - 1V

BC.PADDER ,O 27-8

5-200V.

500M 30-192

MOO,4 O

20-27 3 O

ANT T.., t.DleA s Crysl.l P1ckoP ,...."1-600V

002.6003 1T 22-37 22-6

ALL RESISTORS ARE I/4WATT 1 Creel&

UNLESS OTHERWISE SPECIFIED I MlcroPAone

G -GANG CONDENSER 26-9 I PHON0' P -TRIMMERS ON GANG I

T- TRIMMER CONDENSERS S- BAND SWITCH IOO-II SHOWN

IN S.W. POSITION e -- RADIO -PHONO -TONE SWITCH SHOWN

IN EXTREME COUNTERCLOCKWISE POSITION No 1

No.1-RADIO VOICE Not - TREBLE

No4 PHONO VOICE Ney TREBLE Nob - BASS

OOPV / MIS.

Cry.l.l Culler

1

MICROPHpNE

OPERATION

01-200V

2,1 30-78

I RECORDER'

ZSok Mie 2o-jl

12507 35L6GT

400yRf Mic. 05-AO0V. .005-600V 20-27 .- 22-30 22-I -

(50 fl 30-16

- 2 Meg. 30-204," CORDER ITCH 100-13 05-60ov

22-31 2 SWITCH ON VOL Z

CONTROL

V 30-172 A Bock -Yellow 150 M

CONNECT A TO CONNECT 117 VOL TT Bleck -Yellow Bleck ----- - 130VOLTS Rea -Black Red -Yellow No Prlmery

No Prlrn.ry Bleck -Yellow to Red-Yllow

150 VOLTS Red -Green Rd 230 VOLTS Red -Green Black

40 MCD 250V ELEC.

24-41

¡

aoeoleaaa-OIaYT Gower Tr.nfformer

Black -Start 55-2

Model TD -42

T

65K 7

RAO/O . r.eUN° .

ro r[ -I

?led I. Transformer

1:i TO REcE/vLn' rvPT

1 J

65Q7

C J6 .O/ - LOOr LLo5s-r

/ MEGONM YOLL/L!E CONTROL TAP ''O AT /00,000 JHM5 D35í9

tf R .O/-2OOV.6141010000 2.205+.T

rO r /Ou,0u0 ` /Jod/

ale `JP P v6

4'tCtA`TAf:

PO

7, =Al PHONO INPUT .5-200 CIRCUIT FOR 2zoss-y5 AUTOMATIC S MIXER AUTOM TIC MÖDEL-1424 IM's PRINT s,h

PRIOR TO -

/3000 iL /J/ / 7

750,000 A .0O.ì- /000Y. 3072 5/035 -AN

/54000 n LTOf3

.00/f A7rL2 AI/ CA y. Al 0 TE _.'"G277/6 4/EWS OF PL UGS ANL) cers7wt RECEPTACLE ARE

`" tr, TOP P./EWS. n TUPNTABLE

roo Totr /RAMC

PHONO INPUT CIRCUIT. FOR MANUAL OPERATIO

S AI L C)THERs

PILOT RADIO CORPORATION T .,moo 1st. AND Cdry Y U S A

DO 001 ..

CH MA IC ¡¡J

-DI G CONNECTIONS p.

j2 40

25255 . (.fC : '

Model 1424 Phono Connection

For other Data see

Index.

)John F. Rider www.americanradiohistory.com

PILOT PAGE 13-7

PILOT RADIO CORP. MODEL TD -4 MODEL T%-422

IF PEAK 455 KC 125_,7 12,- 12 Src7 12587 3A. _el

700.4I Mca R F t NAME20-25, 25'1Y1 Mica 400 YJM<r T95 400vV 122uN 75-1 -X08 i0 1

OI-¡ç OV- 2773 273-24 I

iF=` z el

m Ñc qooYi la iF , i hi I#3

2 455 kc E

q _.455K f

ti ñ r

Sp ? 1 I ,

s

Ñ Q ± Front of wafer

Rre V1rw O

p O

' _ = 8 PM So

5 500 SO 92 >O

ea

s O` .-^MNWA-- I om r- - I

03.0-C '\ n II N 1-

.

T L I

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el

3_ 1t.- I~

To = I 83 0 LwA,/r

2M¡ 30 78 20-22

.---.=-- U a I

e o 0^.; soot/ 22.11 ~

u,

O -- (NOOSE

l _% Ó1.2-30V ,. "

J 0U9 zo0.1 ' 22.9 ---- --- .. ¿ C. + PADDER 22-16 3 r + H ,e 352501-

1-2009 L_ 2 a

JSC (01L 77- 5

O N V _ 5 0

n,ß.1 <

72 37-. - I

= 22 4a

0View Rea- View

'Ty OÑ P

- RA2x3-PHUN0 7CNE Sw1TCH I)c. 1

a Urvry =_ Ellie. CHoKe

n 200M

100M30 -I63 - ,---'717.(7r513'---- , >S LOOP ANT 74-8 30-177 84540-5

Ip> 1 .. 1000pm7 W n n n wY Mica X20-40

A < Y V H

r-40 MED f_ W N N Ñ

1- a 25OV ELEC

PN.n pN e Pick VD ^

100 YN( S O -îN w \,\.J "./\ 24-41

y Mica 20-14 = > Vn -1-i Me

./ NEATE RS

````'TTTT

; OMIT

yep¢ 0" 3° 92 ^ RED W

J

,50 El 30-16 V / \ VOLT OPERATION 3500jy1f. 2009 tw Idble Paper

BLACK RED GREEN y W RED W<

A N T .002-6009. 1 22 55 r Q 4 p º O_- Q.RI' AI i -J START

22-6 I -600v 22-37 SWITCH ON VO,

_ -- _.= - _ _ Ili ell ír1111 .

- 2 MCGS -

OMIT CONTROL ALL RESISTORS ARE A WATT UNLESS %

SPECIFIED

0 V. PORE, TRANSFORM T 22.312-31 5 -2 ER - 30-20á

OTHERWISE G GANG CONDENSER 26-9 B ULAGK START P- TRIMMERS ONiANG -1 T TRIMMER .UNDENSERS IL/ A BLACK YELLOW 5- BAND SWITCH 100-10 SHOWN IN Long

PILOT RADIO Cr N. Island C11y, N Y USA SW POSITION IMPORTANT:

,

RADIO- PNONO-TONE SWITCH SHOWN IN EXTREME COUNTERCLOCKWISE POSITION (No I( RECORD CHANGER

OPERATION CONNECT A To

CONNE(" CONNECT H T

° Sc Nemalic Diagram

Model t iaor MOTOR VOLTAGE MUST BE No I -RADIO VOICE ei_ TREBLE SAME AS LINE VOLTAGE. -2

117 VOLTS w[c`oÇ a`^t^ Drawn

-42

23 - Ne 7 BA55 No4-PH VOICEEB-- 130 a Me h.-. --- -.-. ° 110000 .e -...x. ---_ Checkedeby

or CW Dale 1 ^= No 5- - TREBLE

- I60 to coe[x RID ma AlHro Approved b1-

D90 -No 90-25 No 6 - BASS 230,' ono -UA.R K!S_`1E2' r(LLO^

. j -_-t. -

TUNING RANGE -

Broadcast Band 535 to 1720 kc.; 561 to 174 meters

Short Wave Band 5.6 to 24.0 mc.; 53.6 to 12.5 meters 1251(7

C e, IIA 0GAND alCOItDENXR

é

DIM PLATE ÇALIBRATION HOLES ISTART 535 KC. 2- 6 OM

` ' c 1 IC- 1

SA7 0

35 7- 600 NC 4---- -140OKC 5- --'--'- 210MC

5

CALIBRATION HOLES e IF e

I? 51(701F0 L60T

SERVICE NOTES DIAL PLATE MI POWER FILTKR

CHOKE 35

ZSGT TRANSFORMER

The screws for adjusting both the R.F. and I.F. amplifiers of this re- ( o

together the frequencies they be ºP Vmy ºE cw`Ssls `RP* ceiver, with at which should adjusted,.

are all pictured on the above diagram. When aligning the I.F. amplifier,

the generator must be connected to the grid of the 12SK7 R.F. tube

through a .1 mfd condenser. When aligning the receiver, first align the shortwave band connecting the generator to the antenna post with a 400

ohm resistor. Then align the broadcast band using a .0002 mfd.

condenser.

LOOP SOCKET

© o LO CORD SPEAKER

SOCKET

When aligning the loop, the receiver should be in the cabinet with the REAR V1w OE CHAS515

back in place. The adjusting condenser can be reached through the slot

in the lower left hand side of the back. TRIN4 R5 IF AD2JNSTED AT 455 KC A - ANTENNA SW 210 MC

MODELS TD -42, TX -4E B - OSEELA TOR SW 2040MC ó=ó5sit n;óñ PADOCR 60Ó NC

FOR GENERAL INSTRUMENTS 101 RECORD CHANGER,SEE E - LOOP ANTENNA 1400 AC

RIDER'S "AUTOMATIC RECORD CHANGERS AND RECORDERS".

©John F. Rider


8 PILOT MODELS B1, T1 MODELS B2, T2 MODEL T-43

B C.PADDER 2 -4

BAND SWITCH VIEWED FROM REAR 100-2 SHOWN IN BC POSITION

o

ANT COIL ASSEMBLY

270-I 300yyf 251(7

20~ /J

I.F. 455 KC

PILOT RADIO CORP.

125A7 CowvfRrER

CR 100 O PPA

2o 14

40 n 1/2W WW

FL ES. 32-6

G -GANG CONDENSER 26-4 P -PHONO TELEVISION JACK STRIP 84304-2C I. F.455 36

400 M5 eCwATls 50

JelMS 61 nA i

50o4.4s n3 wA r5 50 OHMS 45 wAT T5

150 V - 35 5

13 0 T T O M. VIEW OF BALLAST T U BES

FOR 220 VOLT OPERA ION USE 150 VOLT BALLAST TUBE 35-15 AND RESISTOR LINE CORD NO 103-I CON NECTED AS SHOWN BY ARROWS

Ist I.

73288-

1251(7 i E -.u_ 3S PPA

2,1,11. F. ^ 73288- o

200V. E 22 3

BREA CORNLC/10

00 owns 21wI,

'0474'T5

130 V -351n

TOP VIEW OF CHHSS/S

QEg1p VIEW OF Chf9SS/S

OSC 7/P/MME2.9 BC-/720 KC 8/ 24MC 82 6 MC

ANT TiP/MMEPS BC /4aokC 8/ /8 MC 82 6 MC

8C PADDER-600KC

MODEL T- ¢3

0 a5 lis 117 V-35-3

7.

ei sccKcr

12507 Os

I OV DCi :2-3'

2 MEG.

IN

6V. 200 MA. NO. 51 WHITE

BEAD DIAéa LAMPS

50L60 T vow[R

I 01-600V 22-e

50°'-t'":; (.02- 200 V.

200 M

005 200 V. }2.a

501_ n.:T 1250/ FILAMENTS

65,1.1/2 W

15'S 30-a

34 ,Cal" N[C1I[1[R

10,000 n TCNE CONTROL

79209-D

1F--^ .1-SOO1L 22.31

57 SPEAKER 40 3

SPEAKER FIELD 3.0 Gn.nS 1

40MFD. 30 MFD.

22 32 É0ÉCV2a-21r = z.Ei sw ON

'1

FOR 220 VOLT OPERATION REPLACE LINE II CORD NO 84048 WITH LINE CORD NO 103-1 ll

f

300V.

T-43

Re.t7- TOP VIEW OF CHASS/S

I3[ IF 214f

CJ NO.

Gano

PILOT RADIO CORPORATION

SCHEMATIC DIAGRAM

N_ 8-13-40

90-11

r , A

e

k[-Immers 1st

7CP VIEW OF CIYASS/S


O bäl O 01

Im ;[ PEA2P /ErY OF CHgSS/S

OBE 0 o Vadner 644 N[

I,ne 0 c.ta

T2P/MMERS SAME AS MODEL

51 87-1

171

iii i i171 1 2 3 4 5

F20/VT VIEW O//IL SCALE PyN CAL/B1C'AT/ON HOLES

SAME AS MODEL B1 &T/

MODELS 82 B T2

Ist.F 2ndfF s -- P re*~

OLoot. S«KatOBc osE

Padder 644 Lc

-Pene VIEW OF CHASS/S

T/P/MMERS A-SW-OSC 240 MC 8 -SW- ANT 2/OMC C -BC- ¿OOP /400 k'C

R 2 3 5 Io00 00

0

F2eONTOFD/4L SCALE PHN CAL/B8PAT/ON HOLES I- STg2T 535HC 2-60MC 3-600 Ic'C 4-/4OO11C 5 2/OMC

MODELS B/ if 77


PILOT PAGE 13-9

PILOT RADIO CORP. .M0DEL T-48

DI

Ó

LOOP ANTENNA

G

E

O 5

b 1 b 7"

200M

LINK

.01-600V

IF PEAK 455 KC

r.w CONTROL

POWER TRANSFORMER 117 & 230 VOLTS 83412 F 150 VOLTS 8 412-L UNIVERSAL 83697 5 -BAND SWITCH 100-1 G -GANG, CONDENSER 26-2

65A7 I.F. 455 KC

D 5- 400V:1

20M

40rí2 NIwT

V _

8-40

17

65K 7

_Isrc

05-200"

500M.

-MIMAA/".

.05-200 V.

' IMEG.

M/WuVNvb

50M

6U5

25O00. 01-400V

66G

O N

130

005 000v

1 'Opt -25V ELEC.

.5-600,- .05-6009

IOO M 50M TONG CON T60.

.. 250 PN f caoRu wLJv

.NTROC T PPID

5Y3G 32mot IOf.Al 450 V

T T

ALL FILAMENTS IN PARALLE!

'S1 99Cd<B NT. TRiuNfRS O9a9-J T s I5 BC 6 B1 Ó5°SP TR1LPLSCpÓ9p9

a9R

SERVICE NOTES

a r i00%M0

600 V.

78889 NwiÇ^abs8°:

BOT TOM VIEW OF

SOCKETR

730T TOM VIEW SPKR. PLUG Er SPEAKER ;

FNTENNq TR/MMERS

OSC PqLXJEQS

Bio

820

The locatiin of all adjustments used in re -aligning this receiver, and the frequencies at which these adjustments should be made, are shown zoo,* _s.Q in the accompanying diagram. SOC,re-T

When aligning the I. F. amplifier, the generator must be connected to the grid of the 6SA7 tube through a .1 mfd condenser. When aligning the receiver on the Broadcast Band, connect the generator to the Antenna wire through a .0002 mfd condenser, and on the two short wave bands use a 400 ohm carbon resistor.

ANTENNA

This receiver contains the latest type of self-contained loop aerial and will give excellent results even in distant localities where the signal from the broadcasting státions are faint. However, it may be necessary to turn the cabinet toward the direction of the incoming signal (since most broadcasting stations use the directional antennas), for the best reception from that particular station. For short wave br distant broadcast band reception, the use of an external antenna isrequired.

When using a. doublet antenna, connect one lead-in wire to terminal "A" at the rear of the chassis, and the other lead-in wire to terminal "D". Remove the connecting link- from terminals "D" and "G" and. connect terminal "G" to a ground such as a cold water pipe or radiator. If an ordinary single wire antenna is used, connect the lead-in wire to Terminal "A" on the rear of the chassis. Leave thé link between "D" and "G" terminals and connect a ground wire under terminal "G". A

doublet antenna kit complete with all accessories, can be purchased from your dealer. Ask to see the "Pilot Antenna Kit".

52 BC

0 0 Be B/

/sr /F

OSr' TR/MMEPS B-2 o

a POWEP T,A4NS.

aE.vQ 70P V/ElN OF CHf1SS/S

/SC/F 2nd/F

4s53- et" O

o

TEL EYiS/ON e PrrONO FCK ,9 0 D O

L //VE COQD f ,PEAP V/EINOF CNHSS/S

TUBE LINEUP 65,97- CONVE9PTE9? 6SK7- I F. 61/6 -2nd De t: -f7VC 6SE5 -1st /9.F 6F6Q-OUTPUT 5Y36 -/PECTIF/E,P 6U5- TUN/NG INDICATOR OSC PADDEPS BC -600 ,CiC B/-2.5MC B2-6tiIC /9N77 TIP/MMEPS BC -/500 /E'C B/- 22 MC 82-6 MC


10 PILOT MODEL T-71

LOOP ANTENNA 73381

.05-200V

IA7GT

.01-200V. 22-16 r-

22-28 = " 7 VW`4

1 2 Meg.

5131164 13007 plOsc. /.y 79` 31- 2ÖOA f-

--re t D D -t -.Qom Osc. Coll ""' 1 72-1

25 pf. 20-8

O

73328

--455 ke

Ól/1

PILOT Rr1I)IO CORP.

IN50T

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22-38

73329

455 kc

IHSGT 0I -200V 22-16

100 MNf 20.141

1:0 r) 30 ^- Sa

1- OOV. 2 -34.

LTT

.002-4001 22-5

200n 13203

300 n 13003

100.000 Jti 13031

G - Gang condenser 26-1 P - Hi. P padders 70969-K All resistors are 1/4 watt unless othrwise specified.

LOOP

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1400 kc.

TOP VIEW

cr

455ke.

REAR Val(

Model T-71

132'495

2?--31°°' IF PEAK 455 KC

ti REAR

SPEAKER LINE INE HERE CORD

2Meg Volume

3Ì n2ÓÓ,000^ 36-I

60 fd. 150 V Ele 24 26

I10 -125V. AC. or D.C.

Brown bead 6o-150ma. d.al lamp 72151

switch on volume control shown in

N -(c loe kwise) position

2050,, 20W. typped at 1350 .."1-

ß Top view of battery plugs

TUNING RANGE

5; PM. Dynamic Speaker 41-1

30» fd. 25 V.

Elec. 24-14

Slide Switch shown in 'AC, -DC (right) position. IOI-I

PILOT RA010 CORPORATION

Schematic )Diagram

=...-5-4-40 T 90-/

Broadcast Band: 561 to 187 meters; or 535 to 1605 kc.

SERVICE NOTES The location of the screws for adjusting the oscillator, loop and I.F. circuits is indicated above. When- aligning this receiver, the "A" and "B" batteries must be in place, and the

set correctly mounted in the cabinet. The signal generator should be connected to the grid of the 1A7GT through a .1 mfd

condenser when aligning the I.F. at 455 kc and when setting the oscillator trimmer at 1400 kc. The loop antenna trimmer and the 600 kc padder should be adjusted, using either e weak gtation or a radiated signal from a signal generator. This receiver may be aligned on either battery or house current.

REAR VIEW OF CABINET SHOWING BATTERIES IN PLACE

BATTERY INSTALLATION

Remove the screws from the back and carefully lift off the back.

When removing the batteries, first unscrew clamps, and then remove battery plugs. Be sure not to pull on the cables, but on the plugs themselves.

Place the new "A" and "B" batteries in position shown on diagram below and replace clamps in position shown below.

The black and white cable, coming from the chassis, has a 2 -prong plug which. is then plugged into the double "A" battery. The red and black cable has two 3 -prong plugs, both of which are plugged into the -'B" batteries. It is optional which plug goes into eithér "a" 'battery.

©John F. Rider


PLLOT PAGE 13-11

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ANTENNA This receiver contains the latest type of self-contained loop aerial

and will give excellent results even in distant localities where the signal from the broadcasting stations are faint. However, it may be necessary to turn the cabinet toward the direction of the incoming signal (since most broadcasting stations use the directional antennas), for the best reception from that particular station. For short wave or distant broadcast band reception, the use of an external antenna is required.

When using a doublet antenna, connect one lead-in wire to terminal "A" at the rear of the chassis, and the other lead-in wire to terminal "D". Remove the connecting link from terminals "D" and "G" and connect terminal "G" to a ground such as a cold water pipe or radiator. If an ordinary single wire antenna is used, connect the lead-in wire to Terminal "A" on the rear of the chassis. Leave the link between "D" and "G" terminals and connect a ground wire under terminal "G".

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LINE SW. gl3 SWITCO ON VOLUMC CONTROL

CORO tRT048 Ios -60Ó

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POWER SUPPLY Reo. will operate on 105- 126 v. or 200-240 v. as indicated on the locking plate,move switch to other position & replace plate. When operating on d.c., if rec. does not work 1 min. after turned on, reverse plug in light socket.

SERVICE NOTES Location of adjustments in realigning receiver, and frequencies at which they are made are shown in accompanying diagram. When aligning I.F. amp. the gen. is connected to the grid of 6SA7 tube thru a .1 mfd cond. When aligning receiver on b.c. band, connect gen. to ant. wire thru a .0002 mfd cond. and on 2 s.w. banda use a

400 -ohm carbon resistor.

TUNING RANGE

B.C. Band 537 to 1740 kc; or 660 to 172.3 meters S.W. Band 2-1.98 to 7.09 mc; or 151.5 to -42.5 meters S.W.Band 1-7.2 to 24.5 mc; 41.6 to 12.2 meters

©John F. Rider


PILOT PAGE 13-13

MODEL T-132

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The location of all adjustments used in re -aligning this receiver, and the frequencies at which these adjustments should be made, are shown in the accompanying diagram.

When aligning the I. F. amplifier, the generator must be connected to the grid of the 7A8 tube through a .1 mfd condenser. When aligning the receiver on the Broadcast Band, connect the generator to .the Antenna wire through a .0002 mfd condenser, and on the two short "wave bands through a 400 ohm carbon resistor.

TUNING RANGE

Broadcast Band 537 to 1740 kc; or 560 to 172.3 meters Short Wave Band 2-1.98 to 7.09 mc; or 151.5 to 42.5 meters Short Wave Band 1-7.2 to 24.5 mc; 41.6 to 12.2 meters

T2P/MME,QS /F ADJUSTED TO 455 kC fNTENNA' A- SC /300 KC B - SW 60 MC C - SW 220 MC .2F: H- BC /SO0 ACC T- SW 60 MC k' -SW P20 MC OSC/L L FITOTe D- BC PADDE)e 600 MC E-SWPADDEP 25 MC F- SW 240 MC oscaiLs G- SW 80 4,1C L- SW 60 MC M-SC/500KC RF CO/LS

©John F. Rider

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63750

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Model T-133

Receiver for

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30- 40 Volt D.C.

100-130 Volt A.C. D.C.

200-260 Volt A.C. D.C.

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PILOT PAGE- 13-17.18


Loop Socket

114m

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Section 2 Front

Section 2- 1 Rear 77T.

RF Amplifier R.F. Coil Ass'y AM Converter 65K7 r ---- j71-- j 6SA7

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All Resistance Values in Ohms Unless Otherwise Stated All Resistances Rated at 5 Watt Unies. Otherwise Stated Al Equals 1000 Ohms

All Capacitance Values in MFD Unless Otherwise Stated

All Capacitances Rated at 200V Unies, Otherwise Stated

Small Figures Refer to PILOT RADIO CORP. Part No.

Band -Switch in SW. Position -Part No. zoo-º

PILOT RADIO CORP. LONG ISLAND CITY, N.Y., U.SA.

SCHEMATIC DIAGRAM MODEL FM200

DRAWN BY-M.G.

CHECKED BY -s'.

APPROVED BY-

DATE- 5/20/41

DRAWING NO.

90-27

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los

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40 MAR Silver -Cap

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TRIMMER PART LIST PILOT Part No.

T, Trimmer Condenser 72233-s 12 Dual . Trimmer Condenser 27-e 1*3 Dual Trimmer Condenser 27-2 T. Gang Condenser -3 Stages 226-10 Ts Gang Condenser- 3 Stages on 224-10

T. Trimmer Condenser 27-5 T, Trimmer Condenser bailo -o

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Use PILOT FM -AM Antenna Kit No. no -7

Section I -Rear

COIL PART LIST PILOT Part No.

B.C. Antenna Coil 7046 S.W. Antenna Coil 70-.,

B.C. R.F. Coil n -u S.W R.F. Coil ,is B.C. Oscillator Colt 72-21

S.W. Oscillator Coil 72-22

I.F. Coil -FM -Ist Stage 71-12

I.F. Coil Assembly -AM 73-.d

I.F. Coil -FM -2nd Stage 73-6 I.F. Coil Assembly -AM 73 -lo

IF. Coil -FM -3rd Stage 75-s I.F Coil Assembly -AM 73-8

Discriminator I.F Coil 79-2,

20-' Power

600Vg Plue 2.-4s

FOR GENERAL INDUSTRIES C 125 L Record Changer, SEE RIDERS "A Record Changer and Recorders".

L

Ist FM -AM 2nd FM -AM I. F. IF,

6AC7/1852 6AC7/ 1852

09-7

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600v

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Pilot Lights74469 ^ Section 5-

Rear Cathdde Loaded Driver

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6U5/ 6G5 ioºe

Plane 'Mut

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a/c Pickup

.06-i0 Speaker Cable

.611 Speaker Cable

Recorder Socket

Tweeter Speaker o -u

4100 Field

Woofer Speaker o -lo

z000n Field

John F. Rider


PILOT PAGE 13-19


PAGE 13-20 PILOT MODEL FM2200

PILOT RADIO CORP.

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®John F. Rider ®John F. Rider


PILOT PAGE 13-21

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24 PILOT MODEL 340 PILOT RADIO CORP.

FRONT VIC* OF CHASSIS

152 96 MC ..0

e e e e e I)B II 61 MC MC MC

. 600 Mc .+C1.c Ó

e e e e e 152 96 2 MC C

5MC 20 MC Q ® OO ISOO ItC

When aligning the I.F. amplifier, the generator must be connected to the

grid of the 6SA7 tube through a .1 mfd condenser. When aligning the receiver on

the Broadcast Band, connect the generator to the Antenna wire through a .0002 mfd

condenser, and on the seven short wave bands through a 400 ohm carbon resistor.

In general it is not recommended to re -align the bandspread ooils unless it

is definitely necessary. If re -aligning is found to be necessary, take off the

dial pan be removing the five screws, as indioated on the diagram.

First adjust the oscillator iron core to make the pointer correspond with the

calibration mark. Then adjust the antenna iron core for maximum output. The sig-

nal generator must be accurate within 5 kc on each band,and the use of a calibrating

crystal oscillator is recommended. Otherwise a broadcast signal of known frequency

may be used. In this receiver the oscillator frequency in higher than the signal frequency

on,the broadcast band and lower on the seven other bands.

This Pilot Superheterodyne Receiver has 10 tubes and a Cathode: Ray Tuning Beacon, and operates an either an Alternating or Direct Current power supply.

Broadcast Band

Short Wave Band

Short Wave Band 49 meter Band

31 meter Band

25 meter Band

19 meter Band

16 meter Band

A.C.-D.C. Receiver

TUNING RANGE - 535 to 1730 kc or 560 to 173

2 - 1.75 to 5.85 mc or 171 to 51

1 - 7.0 to 22.0 mc or 43 to 13.S

- 5.9 to 6.22 mc.

- 9.5 to 9.7 mo. - 11.38 to 11.92 mc.

- 15.05 to 15.38 mc.

- 17.62 to 17.98 mc.

meters meters meters

The location of all adjustments used in re -aligning this receiver, and the

frequencies at which these adjustments should be made,are shown in the accompany-

ing diagram.


PILOT PAGE 13-25

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©John F. Rider


26 PILOT

Models 1364,T-1464 Early

I:odel .1424 Series

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PILOT PAGE 13-27


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PILOT PAGE 1312

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RCA PAGE 13-1

MODEL MAGIC WAVE"

RCA MFG. CO., INC. ANTENNA

MAGIC WAVE ANTENNA WITH DISTRIBUTION TRANSFORMER

METHOD OF USING THE MAGIC WAVE ANTENNA TO FEED UP TO FOUR RECEIVERS THROUGH A STOCK NO. 98%4 DISTRIBUTION TRANSFORMER. IF MORE THAN FOUR RECEIVERS ARE TO BE USED, THE ANTENNA SHOULD BE MODIFIED AS SHOWN IN FIG. 2.

OUT OUT

C

DISTRiB- UTION

TRANSF. STOCK

NO. 9814

(.r.'`CG`G`C,O.IGOCC`G

p-

FIG. 1

TRANSMISSION LINE

LINE

LINE

211

OUT OUT

SCHEMATIC DIAGRAM OF DISTRIBUTION TRANSFORMER STOCK N0. 9814

"Cti1.1.1.111.11.1..

.1.^Ca.1.

STOCK NO 9813 RECEIVER COUPLING TRANSFORMERS TO FOUR RECEIVERS

-ANTENNA MAGIC WAVE ANTENNA SYSTEM STOCK N2. 9812

TRANSMISSION LINE

GND. TO RECEIVER

ANT.

ANT.

9511

GND.

LINE

311

SCHEMATIC DIAGRAM OF ANTENNA TRANSFORMER STOCK NO.9849

ELECTROSTATIC SHIELD

190 MMF.

LINE

211

LINE

ANT.

TO RECEIVER TERMINALS

LINE SCHEMATIC DIAGRAM OF RECEIVER COUPLING TRANSFORMER STOCK NO.9313

GM).


2 RCA MODEL "MAGIC WAVE"

ANTENNA RCA MFG. CO., INC.

FIG. 2 MODIFIED MAGIC WAVE ANTENNA AS USED WITH 2 TO S DISTRIBUTION TRANSFORM ERS

30' 15 .-I

PERFORMANCE CURVE OF MAGIC WAVE ANTENNA KIT

111111111111 311111111111111111111111111111 11111111II111111B3111111I1111I3111111111111 1111111111I1111111!1111111111III II

111111111Ii111111111,IA1111111111 !11111111111 111114111I11111111111111 11111111111111111r1111I11111111111111

; 111111111111I1111191111111111/11111111111 mo11111IIIIIIum11111111111ont111111111

111111111111111111111111I1n11IIIIlIi o 1111II111II1Z\1l!!1111111111111f111111111 oK 2 3 S

STOCK 9846

S I II01R 3 cym

TO RECEIVER COUPLING TRANSFORMERS STOCK NO.9813 - ONE FOR. EACH RECEIVER.

GND.

TO RECEIVER

ANT.

\,/ THIS MODIFIED ANTENNA 15 RECOMMENDED FOR INSTALLATIONS FEEDING A LARGE NUMBER OF RECEIVERS

ANTENNA COUPLING TRANSFORMER STOCK NO. 9849

DISTRIBUTION TRANSFORMERS STOCK NO. 9814

TRANSMISSION LINE

THE ABOVE DIAGRAM SHOWS THE INSTALLATION OF FIVE DISTRIBUTION TRANSFORMERS PROVIDING FOR THE OPERATION OF UP TO SIXTEEN RECEIVERS. TRANSMISSION LINES MAY BE RUN IN METAL CONDUIT IF DESIRED ALTHOUGH THIS IS NOT NECESSARY. TWO OR MORE LINES MAY BE RUN IN THE SAME CONDUIT BUT NOT WITH OTHER ELECTRICAL WIRING.

MASTER ANTENNA KIT STOCK Na 9845 - - 20 FEET

JUNCTION BOX --"" TRANSMISSION LINE

NOISE REDUCING ADJUSTMENT 540T01600KC RANGE

COUNTERPOISE

LINE

0

10,000 n.

COUNTERPOISE

20 FEET

COUNTERPOISE SUSPENSION WIRE

INSULATOR

_'D ,-220 MMF.

SCHEMATIC DIAGRAM OF RECEIVER TRANSFORMER STOCK 9846

EO {g ANT.

TO RECEIVER

GN D.

000.11

COUNTERPOISE SHOULD BE ONE HALF THE LENGTH OF THE TRANSMISSION LINE PLUS 10 FEET EXAMPLE: - IF THE TRANSMISSION LINE 15 40 FEET LONG, THE COUNTERPOI*E WILL BE 20+10 OR 30 FEET LONG.


RCA PAGE 13-3

The kit consists of: 1 RCA Victor Magic Tone Cell with Flexible Tone Bridge

and Jewel -Lite Scanner assembled complete in cartridge form.

4 Mounting Screws.

RCA MFG. CO., INC.

Installation of the new Magic Tone Cell contained in this kit offers an opportunity for improving record reproduction from radio -phonographs or other record playing devices. Its design provides reduced "needle" chatter and surface noise, plus the additional feature of converting the pickup to a permanent sapphire point type completely eliminating the changing and use of needles, and crystal breakage at the time of needle change. It is particularly designed for installation in

1.5 D.B. PER olv. COMP

MODEL "Magic Tone Cell Pickup Kit

RCA Victrolas and Record Players manufactured during 1938 and later, with practically no exceptions and slight changes. See Table page 3.

Electrical Characteristics.- Output 1% volts at 400 cycles approximately. Impedance 200,000 ohms at 400 cycles approximately. Frequency characteristics. See Figure 1.

ENSATION

500,000 OHMS

30 50 100 300 500 1000 3000 5000 10,000 CYCLES PER SECOND

OUTPUT -FREQUENCY RESPONSE CURVE Figure 1-Typical Circuit and Curve

CIRCUIT DIAGRAM

2 Spacers. 1 Mounting Plate. 4 Washers. I Plug Button.

INSTALLATION The following illustrations show different types of pickup arms with the new Magic Tone Cell installed. SAPPHIRE LEAD WEIGHT

SAPPHIRE _--_FILLISTER HEAD (TO BE -- MOUNTING SCREWS

BINDER HEAD PLATE SCREW

SAPPHIRE

REMOVED)

17 FILLISTER HEAD MOUNTING SCREWS

--.-PICKUP ARM HEAD

SPACER ' HINGE SPRING PLATE PICKUP ARM SUPPORT

FILLISTER HEAD -MOUNTING SCREWS

PICKUP ARM HEAD

BINDER HEAD N SPACER PLATE SCREW PLATE

PICKUP ARM 1a SUPPORT

PICKUP ARM HEAD

FILLISTER HEAD MOUNTING SCREWS

SAPPHIRE


PI M

SPACER PLATE


SAPPHIRE

R-873

PICKUP ARM PICKUP ARM .HEAD SUPPORT

PLATE SPACER

13"

FILLISTER HEAD MOUNTING SCREWS

PICKUP ARM HEAD

PICKUP ARM SUPPORT BINDER HEAD // PLATE SPACER HINGE SPRING PLATE SCREW

PIN

PICKUP ARM SUPPORT

HINGE SPRING

H-8]1

Figure 2 -Pickup Arms-Underneath View with Supports


4 RCA MODEL "Magic Tone Cell Pickup Kit

To make the installation:

RCA MFG. CO.. INC.

1. See that the power control on the phonograph is

turned off.

2. Loosen the pickup arm at its base mounting so that it

can be lifted complete and turned over. The pickup

arm may be removed from its location in the cabinet

to the extent permitted by the connecting wires. The

support remains attached to the motorboard.

The arms A, D and E, Figure 2, may be disengaged

from their supporting pivots by compressing the two

hinge springs at the rear of the arms.

Remove the pickup arms B and C by pushing' out

the pin at the rear of the arm. Then pull the pickup

forward off the pickup arm support.

3. With pickup arm turned over in a convenient position, unsolder the two leads and loosen the two screws hold-

ing the present pickup cartridge in the pickup arm

head. Then remove the cartridge complete leaving the

loose leads clamped in the arm.

The arm A, Figure 2 may contain a lead weight

which will obstruct ready installation of the new pickup

cartridge. The weight may be removed by (a) scoring

the bracket at its bend with diagonal cutters and bend-

ing until it breaks or (b) drilling several small holes in

the bracket at the bend and bending until it breaks.

It is preferable and recommended to use a new arm,

Stock No. 9951, List Price $0.90.

4. Place the plate, supplied in the kit, in the pickup arm

head with the two irregularly shaped holes in the plate

matching with the screw holes in the arm. Attach the

plate loosely in position with the two short binder head

screws supplied in the kit, placing a washer above and

below the plate on each screw.

5. Solder the two leads to the strip terminals on the Magic

Tone Cell, being sure that the shield lead is attached

to the ground terminal-the one on the right when

viewed facing the front end, sapphire downwards- See Figures 2 and 3.

PICKUP AXIS

R-815

The soldering operation must be performed as quickly

as possible so as not to heat the crystal.

6. Place the Magic Tone Cell in position, sapphire out-

ward, with screw holes matched with the correct pair

of threaded holes in the plate. Before fastening the

Magic Tone Cell to the mounting plate, hold it in posi-

tion and adjust the plate so as to permit mounting with

playing point position, pickup axis and tracking the

same as for the cartridge removed.

Tighten up the plate screws and then assemble the

Magic Tone Cell in place using the two long fillister

head screws supplied, placing the spacers on the screws

between the cartridge and the mounting plate.

Note: Be careful not to bend the sapphire support

wire, and be sure that the lead connections do not

short to the arm, spacers or plate.

7. On pickup with a comparatively large hole on top for

needle insertion, insert the plug button, supplied in the

kit, securely in the hole.

8. Carefully reassemble the pickup arm and check its

movement, making any necessary adjustments for cor-

rect operation as indicated in later paragraphs.

In case adjustment for "set down" and "height" is

necessary it may be advisable to refer to service notes

for the particular record player.

It may be necessary to weaken the tension on the

feed -in spring on some mechanisms, in order to prevent

the pickup from kicking -in too hard at the beginning

of each record. Reduce tension by lengthening the

spring or in most cases cut and remove the spring.

On certain phonographs it may be desirable to adjust

the compensation in the audio circuit for best record

reproduction.

STRIP TERMINALS

SHIELD LEAD

HOLES FOR' GROUND MOUNTING SCREWS

R -8T2

Figure 4-Pickup Axis Figure 3-Magic Tone Cell (Sapphire Downwards)

(John F. Rider www.americanradiohistory.com

RCA PAGE 13-5

RCA MFG. CO., INC. MODEL "Magic Tone

Cell Pickup Kit

COMPENSATION Table of typical RCA Models with suggested changes for greatest volume and best fidelity

Model Electrical Adjustments

U,9 Change R14 to 220,000 ohms Change C17 to .005 mfd.

U25 Remove R9. Short out RIO. Connect C13 from high side of phono input to tap on volume control.

U-40 Change R18 to 120,000 ohms Change R16 to 22,000 ohms Change C9 to .005 mfd.


U-43 Change R18 to 220,000 ohms Change C9 to .005 mfd.


U-123 No changes required.

U-125 Remove R9. Short cut R10. Connect C12 from high side of phono input to tap on volume control.

U-130 Remove R46

R-98

V-100

V-170

V-200

Change Change

Change Change

Change Change

Change Change Change Change

R2 to 27,000 ohms CI to .025 mfd.

R14 to 180,000 ohms C17 to .005 mfd.

R21 to 220,000 ohms C48 to .005 mfd.

R4 to 82,000 ohms R5 to 180,000 ohms R6 to 270,000 ohms C25 to .005 mfd.

V-205 V-405

Mechanical Adjustments

On all models the sapphire height above the motorboard should be checked. The sapphire point must enter the record groove and bear properly on the record. It must not strike or scrape on the motorboard as it may be damaged.

Swing out the pickup over the motor - board and adjust the sapphire height by carefully bending the pickup arm support bracket so that the sapphire point is 1/8 inch above the motor - board. The pickup should then- oper- ate properly throughout the playing cycle for both automatic and manual playing.

Any other necessary mechanical adjustments should be made in accordance with the Service Notes for the particular model.

TESTS."-Page four.

Change R7 to 120,000 ohms Change R8 to 270,000 ohms Change R9 to 220,000 ohms Change R31 to 15,000 ohms Change C34 to .005 mfd.

The information on the above key models will serve as

a guide to cover the installation on other RCA Models of 1938 and later manufacture.

General Information on Compensation For Pickup Circuits 1. The pickup should be terminated or loaded in accordance with the information given in the preceding table. 2. Decreasing shunt resistance across pickup circuit decreases bass response and increasing shunt resistance across pickup circuit increases bass response. 3. Examples of compensation adjustments.

Cl

Circuit I-Increasing R1 increases low frequency response. Increasing Cl increases high frequency response.

R3 Increasing value of R3 with respect to total value of R2 plus R3 increases the output.

CIRCUIT I Figure 5-Pickup Circuit


6 RCA

MODEL "Magic Tone Cell Pickup Kit RCA MFG. CO., INC.

001' R1

CIRCUIT II

R2

TCI

Figure 6 --Pickup Circuits

Circuit II-Increasing R1 increases low frequency response. Increasing R2 increases high frequency response. Decreasing Cl increases output.

1.

R1 C2

T CIRCUIT III R-674

Circuit III-Increasing R1 increases low frequency response. Increasing R2 increases high frequency response. Increasing value of Cl with respect to total value of Cl plus C2 increases the output.

Operating Tests

Mechanical-The pickup should be tested for its corn- plete operating performance. On record changing instruments both a full stack of records and a single record should be used in the test.

Checks should be made for:- a. Correct landing on 10 inch and 12 inch records.

b. Correct tripping on 10 inch and 12 inch records.

c. Correct elevation of pickup arm.

d. See that neither sapphire guard nor rear end of pickup tends to "drag" on the record when a full stock of records is being used. Seat pickup deeper into arm if necessary.

Refer to the service notes for the particular model in all cases requiring readjustment.

2. Electrical-It should be remembered that the output of the Magic Tone Cell is inherently lower than that of former crystal pickups, thus involving a lower reserve volume. The volume control on the instrument must therefore be further advanced than before, and the full volume position may occasionally be necessary. The best operating position should be checked on several records.

a. Hum-In cases of excessive hum, examine to see that shielding is intact and receiver circuits are nor, mal. Make any necessary corrections.

b. Rumble or Howl-Excessive rumble or howl may be remedied by examining motor and motorboard mountings for flexibility and making any necessary corrections or improvements.

Replacement of Sapphire Stock No. 38449

SAPPHIRE GUARD SCREWS

SAPPHIRE

SAPPHIRE HOLDER

SAPPHIRE GUARD

Figure 7-Magic Tone Cell Showring Sapphire

Caution-Never bend the sapphire support wire. The nut on the sapphire holder assembly is locked by a

light cement (such as Glyptal). Extreme care should be used when loosening the nut so that the twisting motion does not break the crystal.

Remove the two screws holding the sapphire guard in place and take the guard off. Remove the small nut and washer on the threaded shaft of the sapphire holder and push the shaft through the hole in the viscoloid until the sapphire holder assembly comes free.

Insert threaded shaft of replacement sapphire holder through viscoloid and replace the washer and nut. Make

NUT WASHER THREADED SHAFT

SHOULDER

I ale VISCOLOID DAMPER

SAPPHIRE

sure that the flat sides of the shaft are firmly in place in the clamp and then tighten the nut very carefully so as not to strip the threads nor break the crystal. Replace the sapphire guard, positioning it by means of the oversize screw slots. Make certain that the sapphire and its supporting wire are centered in the guard. Tighten the guard screws.

Before using, check to see that the sapphire projects far enough beyond the guard so that the guard will not strike the record. If necessary, bend the guard a little. Apply a

drop of light cement (such as Glyptal) to the sapphire nut holder.

g5John F. Rider www.americanradiohistory.com

RCA PAGE 13-7

(D)

TO ANTENNA

INSULATOR

ANTENNA TRANSFORMER

TRANSMISSION LINE

RECEIVER TRANSF. STOCK 12424

F E

ANT. GND.

RP -158, RP -160

F E

COIL

RCA MFG. CO., INC.

SPIDER -WEB ANTENNA STOCK Nº9689 APPROX. 37 FT.

TRANSMISSION LINE

P D

MODEL "Spider -Web" Antenna.

NOTES,CHANGES

DOTTED SECTION SHOWS POSITION OF ULTRA SHORT-WAVE

ANTENNA - MADE UP OF AUXILIARY KIT - STOCK NO. 9689

SCHEMATIC DIAGRAM OF RECEIVER TRANSFORMER STOCK 12424

ANT. ' 1 D

INSULATOR

C

COIL N

SCHEMATIC DIAGRAM OF ANTENNA TRANSFORMER

THE EFFECTIVE RANGE OF ANTENNA 15 FROM 140 TO 23,000 KC (4 BANDS) THE ULTRA HIGH FREQUENCY BAND

(23 TO 70 MC) MAY BE COVERED BY THE ADDITION OF AUXILIARY KIT STOCK NO. 9689

Tone Arm Stop Bracket:

On 2nd production RP -158 and RP -160, a stop bracket has been added to the top of the motorboard to restrain the tone arm. It is mounted by means of the same screw, lock - washer, and nut used to mount the pickup shorting switch. Where difficulty is experienced with excessive movement of the tone arm on 1st production mechanisms, this bracket may be added as shown. The bracket is Stock No. 39832. RP -158, -160

To Repeat One Record:

When checking RP -158 and -160 record changers for landing and tripping action, it is possible to play one record repeatedly by simply placing a weight on the rear record post. A small pipe nipple that fits over the top of the post is satisfactory.

SHORTING SW MOUNTING \ SCREWS

BRACKET II --158 -

AUTOMATIC STOP SW.

NtP d

Tone -arm stop bracket (No. 39832) position on RP -158, -160.

RUBBER BAND

APPROX .2%y

FOR 10" RECORDS PLACE RUBBER BAND

ACROSS FRAME AT POSITION OF BOTTOM SCREW

BOTTOM VIEW OF BELT GUIDE SCREW PLACE RUBBER BAND IN POSITION SHOWN.

FOR 12- RECORDS

RP -151 RECORD CHANGER

To Play One Record Continuously:

It is possible to play one record cqntinuously on the,RP-151 by stretching a 3h -in. or 4 -in. rubber band across the mechanism, as shown, to prevent the record dropping through the motorboard.

The continuous playing of a record in this manner is handy when the record changer is being serviced, especially after the separator knives have been checked and tested, and it is desired to allow the changer to run on the shop bench without attention.

Revised reject button and lever in RP -158, -162.

LINE

180 MMF.

ELECTROSTATIC SHIELD

V \ ANT. GND.

TO RECEIVER TERMINALS

RP -158, RP -162

Change in Reject Lever and Button:

2nd production of RP -158 and RP -162 automatic record changers have a reject lever arrangement as shown in accompanying sketch.

List Stock No. Description Price

39755 39756 39757

Button-Reject button .15 Lever-Reject lever and stud .25 Lever-Reject button right

angle lever .10

REJECT BUTTON STK NO. 39755

MOTOR BOARD

STK NO. 39757 STK NO. 39756

RP -160

Tone Arm Return Lever Spring:

The tone arm return lever spring Stock No. 39599. The correct 39038. V-215, V-221

REJECT LEVER

is listed as number is

Speaker RL -70N-6: On 2nd Production of V-215 and V-221,

the speaker is changed from RL -70M-2 to RL -.70N-6. The replacement parts are identical. A rubber band stretched across the motor - board as shown permits continuous play-

ing of one record on RP -151 record changer during service checking

of the mechanism.

©John F. Rider


8 RCA CHANGES NOTES ,DATA

"KNOCKED -DOWN" VOICE

COIL AND CONE Installation Instructions:

To simplify cone replacement in certain speakers, the cone and voice coil are supplied as two separate units : (1) The voice coil and support, (2) The cone diaphragm.

General Procedure (a) Cement voice -coil support to the speaker

using centering gauge or speaker shims. (b) Solder voice -coil leads. (c) Put cone in place, cementing around rim

of speaker frame. (d) Cement junction of cone and voice coil.

Detailed Instructions (a) Remove old cone and voice coil. Protect

air gap with scotch tape. Clean off all paper and cement.

(b) Apply a ring of cement (Duco Household) on top plate.

(c) ,Insert centering gauge in new voice coil, handle first, from the winding end.

(d) Remove scotch tape from gap. Insert voice coil and gauge in gap with leads in correct position for soldering. Press rim of voice coil support into the cement.

ABSORPTION WAVE TRAP For Loop Receivers:

Interference and cross modulation due to the presence of a strong local broadcast station is seldom experienced on loop -type receivers because the signal pickup is much less on a loop

'than on an antenna. - However in rare cases where such interference is encountered, it can generally be eliminated by using an absorption -type wave trap, loosely coupled to the loop on the receiver, as shown in accompanying sketch, and tuned to the frequency of the interfering station.

A good absorption trap can be matte with a small loop like that used in Model BP -10 "Personal" radio. Fasten a two -section mica trimmer (salvaged from a discarded IF transformer) on the small loop. Connect the trimmer across the terminals of the small loop. Use one trimmer, or both in parallel, depending on whether the interfering station is at the high or low end of the broadcast band.

Tune the receiver to the frequency of the interfering station, place the trap near the receiver loop, and adjust the trap trimmer(s) to resonance, indicated by a sharp dip in signal strength. Use smaller or larger capacity trimmers if required to reach resonance.

Check to see if the particular interference effects have been eliminated. Adjust the position of the trap to secure closer coupling if necessary to further increase signal absorption. Avoid over coupling. Fasten the trap in the desired position on the receiver loop.

BP -10 LOOP USED AS ABSORPTION WAVE TRAP

On a loop receiver, interference front a strong local broadcast station can be reduced by using an absorption loop,

tuned to the interfering station, and loosely coupled to the

receiver loop.

RCA MFG. CO., INC. (e) Solder the voice coil leads to terminals,

allowing sufficient slack to permit free motion of the cone. Dress leads in plane of motion, clear of cone and housing.

(f) Apply a ring of cement around the rim of speaker frame. Place cone down over voice coil and press cone rim tight to speaker frame.

®i ..

'-DUST CAP

itk a

\ / SCONE VOICE COIL

LEADS VOICE COIL SUPPORT

VOICE COIL

Certain replacement cones are supplied "knocked -down" in two pieces-(1) The

voice coil and centering support. (2) The cone diaphragm.

VOICE COIL IMPEDANCE And DC Resistance:

In servicing RCA radio loudspeakers, it is helpful to know that the DC resistance of the voice coil is approximately 10 percent less than the impedance at 400 cycles.

For example, a speaker with a rated voice - coil impedance of 2.2 ohms at 400 cycles will measure about 2 ohms DC resistance.

Radio storage battery can be charged on a DC farm -lighting outfit.

BATTERY COMPLEMENT

(g) Allow cement to dry on cone rim and voice - coil support. Then run a ring of cement around the junction of the cone and voice coil, being careful the cement does not run inside voice coil.

(h) After cement at junction has dried, remove gauge, using a rotary motion.

(i) Cement large cardboard gasket in place. Set the speaker in inverted position on a flat surface until gasket is dry. Cement dust cap on cone center.

CENTERING GAUGE 35301

CONE GASMET\

HOUSING RIM

C S WICH SPEAKER FRAME COIL SUPPORT * r 'CONE TOP POLE PLATE -

VOICE COIL CONE E. VOICE COIL

JUNCTION

When installing "knocked -down" speaker cone, the junction of the cone and the

voice coil is cemented last.

RECHARGING 6V BATTERY On 12V or 32V DC Supply:

A 12 -volt or 32 -volt DC farm -lighting supply can be used to recharge a 6 -volt radio storage battery. The recommended circuit is shown herewith. The charging rate may be increased or decreased by using a higher or lower wattage lamp

GO WATT 12 OR32v. LAMP D.P. D.T.

SWITCH

G VOLT BATTERY

(MEDIUM DUTY)

-- 12 V. OR 32 V. DC SUPPLY LINE

o- + TO RECEIVER

For RCA Portable Models

MODEL BATTERIES EVEREADY No. BP -10 (RC -544) 1 1.5 volt "A"

1 67.5 volt "B" No. 950 No. 467

15BP Series (RC -527, 527-A)

1 1.5 volt "A" 2 45 volt "B"

No. 743 No. 482

25BP (RC -527-D, 1020) 1 1.5 volt "A" 2 45 volt "B"

No. 743 No. 482

26BP (RC -559) 2 4.5 volt "A" 2 45 volt "B"

No. 746 No. 482

BP -55, -56, -85 (RC -455)

1 6 volt "A" .2 45 volt "B" No. 747

No. 482 94BP (RC -407) 1 1.5 volt "A"

2 45 volt "B" No. 742 No. 762

94BP (RC -407-B)

1 1.5 volt "A" 2 45 volt "B" No. 742

No. 762 1 1.5 volt "A" 2 45 volt "B" No. 745

No. 482 or 727 1 1.5 volt "A" 2 45 volt "B" No, 741, 742, 743

No. 482 or 727 94BP-4 (RC -410) 1 1.5 volt "A"

2 45 volt "B" No. 742 No. 782

* Or equivalent.

©John F. Rider


RCA PAGE 13-9

CfiANGES

IIT V. 60H.

RCA SCHEMATICS

Switch Positions:

Practically all of the larger RCA receivers have decals on the cabinet (or other means) to indicate the function of each position on the more complicated switches. In cases where only the chassis is brought in for service, the corresponding information about controls is given in a knob drawing printed in the Service Note.

For example, the accompanying schematic shows the radio-phono-tcne control switch circuit in Model V-135, drawn as usual in the extreme counter -clockwise position. The knob view shows the function of each position:

(1) "Off" (counter -clockwise).

(2) Radio-mellow tone.

(3) Radio-full tone.

(4) Phono-mellow tone.

(5) Phono-full tone (clockwise).

As a general rule, on RCA receivers clockwise rotation of a control produces an increase. Thus on a range switch, the lowest -frequency hand is counter -clockwise, and the highest -frequency band is clockwise. On tone controls, the narrowest audio range or deepest tone is counter -clockwise. The widest audio range or highest tone is clockwise.

2

(RtAR)

RADIO- PH ON O Swl T¢ N

OFF met -Low

PHONO RADIO

RADIO- PHONO SW. VIEWED FROM FRONT AND SHOWN IN OFF (Mn%IMUM COUNTER- CLOCKWISE) POSITION.

In RCA Service Note schematics, wafer switches are shown in extreme counterclockwise position, and the drawing of

control knobs gives sequence and function of switch positions.

Installing No. 38204 Antenna Loop in BP -10 Where Loop is Held with Snap Fasteners.:

A. Remove the defective loop and its flat molded cover by prying out the two snap fasteners.

B. Spread white paint or ink on the surface of the two bosses ,,in lid.

C. Place the new loop and cover in correct position inside the lid and press down so the paint will transfer on to the loop cover.

D. Drill holes (.242 -inch, No. C drill) in the flat loop cover at the exact center of each paint mark.. Countersink each hole (approximately 3/64 -inch) on loop side, so that the flat cover will set flush with the top of the bosses.

E. Fasten the loop and cover to the lid with the two snap fasteners supplied.

Installing No. 38204 Antenna Loop in BP -10 Where Loop is Riveted in.Lid: A. Drill the riveted ends of the rivets, and

knock the rivets out, being careful not to damage the molded lid. Remove the defective loop and its flat molded cover.

B. Place the new loop and cover in correct position inside the lid. Use the two rivet holes in the lid as a guide to drill corresponding holes in the loop cover.

C. Fasten the loop assembly to the lid with the two rivets supplied.

RCA MFG. CO., INC.

BEST LOOP PICKUP DUMMY TERMINAL

NOTES, DATA

In Corner of Window: On Replacement Volume Controls:

In a metal -framed structure, such as a car, On certain replacement volume controls, the train, plane, or steel building, best signal location of the "dummy" terminal is changed pickup is usually obtained by placing the loopas shown in accompanying sketch. in one corner of the window instead of in the center. The center of the glass space is usually

ORIGINAL LOCATION a null for signal. This fact should be kept in mind when using the extension loop on a port- OF DUMMY TERM. able radio, as there is a natural tendency to fasten the loop in the center of the window.

WINDOW IN METAL- FRAMI: si R(.ICTURE

LEAST SIGNAL PICKUP IN Cr NTLR

BEST SIGNAL PICKUP IN - CÖRNER

LOOP

NEW.- LOCATION OF DUMMY TERMINAL. (HAS COPPER RIVET)

For best signal pickup, the extension loop - Change in location of dummy terminal on

on a portable set should be placed certain replacement volume controls. in corner of window.

ELECTROLYTIC CAPACITORS QU7, QU-51, -52, -55, -56

Terminal Identification: Tone Arm Pressure Spring: When replacing the tone arm, or the mag - On certain types of multiple -section electro -nette pickup head, check the needle pressure lytics, the terminals are identified by small which should be approximately 3 ouhces. markings (triangle, half -round, or square). The Alter the counter -balance spring in arm to ob - marks are either cut-outs or mouldings in the tain the correct pressure, or install a new base. Corresponding marks are shown adjacent spring.. Two springs (65 turns and 75 turns) te the electrolytic symbols in the schematic are supplied under Stock No. 38213. Use the diagrams. spring that most nearly gives the correct pres-

sure and then remove turns, or stretch the spring, as required, for final adjustment. FIELD

BP -10 In some electrolytic capaci ors, the termi-Loop and Moulded Lid: nals are identified by half -round, trian-

gular, and square markings. Corre- sponding marks are shown adja-

cent to the symbols in the schematic.

Installing Stk. No. 38211 Molded Lid in BP -10 Where Loop is Riveted in Lid: A. Snip the two hinge pins and pull the pins

out of the hinges, to permit removal of the defective lid.

B. Drill the riveted end of the rivets and knock them out, being careful not to damage the flat loop cover. Remove the loop and its cover from the lid.

C. Spread white paint or ink on the surface of the two bosses in the Stock No. 38211 lid.

D. Place the original loop with its flat cover - in correct position inside the Stock No.

38211 lid and press down so the paint will transfer to the loop cover.

E. Drill holes (.242 inch, No. C drill) in the flat loop cover at the exact center of each paint mark. Countersink each hole (approximately 3/64 -inch) on loop side, so that the flat loop cover will set flush with the top of the bosses.

F. Fasten the loop and cover to the No. 38211 lid with the two snap fasteners supplied.

G. Assemble the lid and loop to the chrome panel, using the hinge pins and springs furnished with No. 38211 lid.

Stock No. 38204 antenna loop with un - drilled flat molded cover, and/or Stock No. 38211 molded lid with bosses for snap fasteners, can be used in any Model BP -10 where the antenna loop is secured in place with rivets, or with snap fasteners.

6X2, 24BT-1, -2 Loose Dial Pointer:

Expansion and contraction due to tempera- ture changes may cause the metal dial pointer to become loose on the moulded button shaft.

This condition has been corrected in production by fastening the pointer with "Du Pont "Iousehold Cement" as shown.

C CEMENT POINTER TO MOULDED SHAFT

Loose dial pointer can be repaired with Du Pont Household Cement.

©John F. Rider


10 RCA CHANGES NOTES,DATA

Q16E (RC -561-C) Service Data:

Model Q16E is similar to Model Q16, except that it has an EM speaker, as shown in accompanying sketch, and the following parts are different :

Unit List

Stock No. Description Price 12896 Capacitor -15 mmfd., moulded

mica $ .35 33806 Capacitor -.0015 mfd. .25 32342 Capacitor -Electrolytic, com-

prising 2 sections of 10 mfd 450 volts each 1.20

38409 Control -Tone control 1.00 34761 Resistor -10 ohms, } watt .20 30492 Resistor -22,000 ohms, }

watt .20 30652 Resistor -1 meg., } watt .20 30649 Resistor -2.2 meg., } watt .20 32911 Transformer -Power trans-

former -105-120 volts, 50- 60 cycle 4.10

32852 Transformer -Power transformer -110-220 volts, 50- 60 cycle 4.50

2917 Washer -"C" washer to hold tuning shaft .03

SPEAKER ASSEMBLIES (RL -79C-1)

31825 Cap -Dust cap 32903 Coil -Field coil -1,800 ohms 38392 Cone -Cone complete with

voice coil 5118 Plug -3 -prong male plug for

speaker 32905 Transformer -Output trans-

former

Note. -If the stamping on speaker in instrument does not agree with above speaker number, order replacement parts by referring to model number of instrument, number stamped on speaker, and full description of part required.

6FG G OUTPUT

C 2S .0015

To RECT. FILAMENT SY3 G

RIS

FIELD

C 29 10

MFD,

T2

trni C 30 lo MFD.

V. C.

.02 1.25

1.25

.25

1.35

Z=. E. M.

SPEAKER

G16 -!M.

Speaker connections in Model Q16E (RC -561-C).

26BP

Alignment: The RF, detector, and oscillator adjustments

in Model 26BP are easily accessible when the chassis is mounted in the cabinet. Consequently the regular dial may be used for reference during alignment. In the event that only the chassis is brought in for service, the accompanying full-size dial reproduction can be used as a substitute for the regular dial.

RCA MFG. CO., INC.

Q12 Correction in Service Data:

The RL -86A-3 speaker is incorrectly listed as a PM type. This should be listed as an EM speaker with 450 -ohm field coil.

16X4 RF Plate Load Resistor:

In some ptoduction, the load resistor in the plate circuit of the RF tube is changed from 3,900 to 2,200 ohms.

12SQ7 2 ND. DET. AF -AVC

QU56C, QU56M Instability:

Development of appreciable RF impedance in the electrolytic filter capacitor creates common coupling and may cause IF oscillation. To eliminate this possibility, an RC filter is connected in the +B lead of the 1st -detector plate circuit, as shown in accompanyng sketch.

SA7 IST. DET. OSC.

AOD .05 MFD. Z

t,tU sec .M

IST. I.F. TRANS

F LI

ADD 100011

iB

In Q56 -C, -M, an RC filter 'is added the 1st -detector plate circuit.

28X5 Insufficient Push -Button Range:

In Model .28X5 if the push -buttons have insufficient range, realign IF at exactly 455 kc. If this does not correct the trouble, replace the main' oscillator coil Stock No. 38685 and realign the set. The correct coil has no number stamping; do not use coil stomped 95106-501. Q44 .05 Mfd. Capacitor:

Change Stock No. 32787 to. No. 4886.

QU51C, QU51M, QU55 Voice -Coil Impedance:

The voice.çoil imp ance of the RL -70N-1, RL -70N-3, and RL- 1A-4 is incorrectly listed as 15 ohms in the Service Data. The correct impedance is 2.2 ohms at 400 cycles.

STOCK Nó. 160 CRO Vertical "Bounce":

The 160 'oscillograph has extremely good lowfrequency response, passing a 4 -cycle square wave with good fidelity. It is possible to encounter instances in which a line -voltage meter, due to its inertia will indicate little or no v-ariatjtyt of voltage, whereas the oscillo - graph will exhibit noticeable vertical "bounce" due to line -voltage fluctuations.

If a cústomer desires to retain the normal lowfraquency response of the 160 and has a power lite which varies in voltage appreciably, it is necessary to provide voltage regulation, such as TMV-173 voltage regulator. How- ever, if the extreme response of the 160 is superfluous for the particular application in mind it can readily be reduced, affording a reduction of the "bounce" to an unobjectionable value. This is accomplished by removing the present coupling condenser, C-20, and substituting a 0.05 mfd. 400 -volt condenser. The response is then down a few percent with a 15. - cycle sine. wave input.

(The 160B incorporates filtering circuits to eliminate vertical "bounce.")

For applications in which it is desired to connect directly '12. the cathode ray tube deflecting plates, such the observation of a modulated RF envelope 'from a transmitter, it is possible to completely eliminate the vertical "bounce" by merely disconnecting either side of the coupling capacitor, C-23.

OUTPUT TUBE

R ECT. TUBE +kj

FIELD COIL

TAPE

in 50 MFD. 1 MFD.

V105 l

When Model Q17 is used on 110 -volt DC supply, the 1st -audio grid circuit should

be changed as shown above to prevent distortion due to incorrect bias.

Q17

Distortion on

OI1T PU r- TKANS

HUM BUCNINC, COIL

V.C.

CONNECTIONS FOR ELECTRO- MAGNET SPEAK ER

Connections for RL -86A-3 EM speaker in. Model V-105.

V-105 Using EM Speaker Replacement:

RL -86A-3 "EM" speaker can be used as a replacement for RL -81B-4 PM speaker in Model V-105 by wiring in the field coil and output transformer as shown in accompanying diagram. The original output transformer can be used by taping up the black (tap) lead.

110-V DC () elation: In this particular model, it is necessary to P solder a jumper across contacts 8 and 9 on

Distortion at all volume levels when Model the front section óf the radio -phono switch. Q17 is operated on 110 -volt DC supply is

This keeps the 1st -detector and IF tubes in operation when the switch is in "phono" posi - caused by incorrect bias on the 12SQ7 con- fion, and thus maintains sufficient current trol grid. This condition can be eliminated by through the field coil for adequate excitation. changing to the circuit shown in accompany- The customer should be instructed to tune ing sketch. the set to a quiet point on the dial to prevent radio break -through on phono.


RCA PAGE 13-11

RCA MFG. CO.. INC.

55607080100120140160 Model 26BP full-size dial reproduction.

This can be used for reference during alignment.

CV -112, CV -112X Electrolytic Capacitor:

These AC power units are described in "Sup- plementary- Information No. 4 and No. 5." The Stock Number of the electrolytic capacitor should be changed front No. 30873 to No. 398.46.

STOCK No. 154 BFO

Alignment: The instruction book for Stock No. 154 beat -

frequency oscillator specifies 350 kc for the fixed oscillator frequency. In some production, a frequency of approximately 343 kc is used in order to secure correct dial calibration.

Also, in figure 11 of this instruction book, the trimmer numbers C10 and C3 are reversed They are shown correctly in figure 9.

158 AND 160-B CRO Filter Circuit Change:

In some 1st Production of Stock No. 158 and 160-B cathode ray oscillographs, numbered in the 2,000 series, the .1 mid 1st -filter capacitor may short due to starting-voltaagge surge. To prevent recurrence, replace the 21',D00 ohm input filter resistor (R38 in 158, R33 in 160) with a 120,000 ohm 1 watt resistor, Stock No. 13483. This change should be made when the shorted .1 mfd capacitor is replaced.

167, 167A TEST OSCILLATOR Dead Spots on HF $and:

Dead spots or failure to oscillate on the high -frequency band in the Stock No. 167 or 167A test oscillator may be corrected by inserting a 47 -ohm i -watt resistor, and making slight changes as shown in accompanying sketch.

COIL LS L.E. o-

A70 47A r, RE 5.

BLASE

r I .,REMOVE BUS

AOD tJ4 bus 1 GROUND 70 CHASS'S

DIRECTLY BELOW. J COIL.

EMOva BRAID LEAD

Change in Stock No. 167, 167A test oscillator to eliminate dead spots, or failure

to oscillate, on HF band.

MODEL vs "RP" NUMBERS The automatic record changer mechanism in

certain models is designated by an "RP" number, as follows:

RCA Model "RP" N umber N umber

13U5 RP -145E VA -15 RP -152 U-40 RP -139A, 145 U-42 RP -139A, 145 U-43 RP -139A, 145 U-44 RP -139A, 145 U-45 RP -139A, 145 QU51-C RP -145E QU51-M . RP -152R QU52-C RP -152S QU52-M RP -152R V-135 RP -162,,

CONVERSION KIT No. 9889 For Television Alignment Oscillator:

This kit is used to convert No. 159 oscillator to include 59-67 mc in place of 43-51 me.

Parts supplied in this kit consist of: 1 escutcheon ; 1 coil complete with core and bracket; 1 switch contact; and necessary screws, nuts, and washers for mounting.

Revision procedure is as follows: (a) Cut lead from Cl to SIA. (b) Cut lead from L1 to SIB. (c) Cut lead between old 44-50 mc and 50-5E

me taps on SIA. (d) Mount extra contact on S1A preceding old

44-50 mc position. (e) Connect extra contact lead to Ll. (f) Drill and tap 6-32 hole in center of sweep

condenser' stator bar nearest front panel. (g) Mount new 59-67 mc coil L9. (h) Connect lower L9 lead (nearest bracket

end) to common coil bus hear L5. (i) Connect tap L9 lead to former Ll switch

contact on SIB. (j) Connect Cl to former 44-50 mc contact

on S1A. (k) Mount escutcheon.

Make the following changes to the instruction book IB-32011:

Page 8-Delete adjustment No. 5. Add adjustment 6A, symbol L9, description 60-66 mc band tuning: set the center of the sweep range to 63 mc.

Page 14-Change schematic as shown, in accompanying sketch.

CI 17- 36 MMF.

49-57 MC.e< 59-67 MC.o

T68 J 65-73 MC. MMF. 77-85 MC. o

83-91 MC. o

o<

o S1A

L1 L9 L2 L3 L4

To accommodate deletion of the original No. 1 channel (44-50 mc), and addition of the new No. 2 channel (60-66 mc), kit No. 9889 is available to convert

Stock No. 159 television alignment oscillator.

RCA VICTROLA

MECHANISM DATA V-170 - RP -152 V-175 RP -158 V-200 RP -152A V-201 RP -152A VHR-202 RP -155 'V-205 RP -152B V -205A . RP -153 VHR-207 RP -155 V-209 RP -158 V-210 RP -158 V-215 RP -160 V-219 RP -160A V-221 RP -160B V-225 RP -151 V-300 RP -152J V-301 RP -153 V-302 RP -153 V HR -307 RP -155 V-405 RP -152J VHR407 RP -155

CHANGES NOTES, DATA

"RP" vs STOCK NUMBERS In service data for radio -phono combinations,

the automatic record changer mechanism is usually described in a separate service note. In such cases, the mechanism is identified by an "RP" number. Certain of these mechanisms are also marketed under RCA "Stock Num- bers." Corresponding "RP" and Stock Num- bers' are listed below. For service data on any given Stock Number of mechanism, refer to the corresponding "RP" service note.

RP No. Stock No. RP -139B 9865 RP -139C 9865 RP -145A 9865A RP -151 9933 RP -152C 9909 RP -152M 9909D RP -155A 9910 RP -158 9930 RP -160 9931 .RP -162 9932

CABINET MUST BE LEVEL

For Correct Landing and Feed -in: V-215 and V-221 "roll -out" record changers

are designed to operate WHEN THE CABI- NET IS LEVEL. The changer is automatically tilted forward 3 degrees when in the cabinet. Always make landing and feed -in adjustments under these conditions.

In V-215 and -221, an adjustment is located on each of the rear legs to permit fore-and-aft leveling. If the changer does not roll out correctly when the cabinet is level, inspect the rubber -tired rollers and the guides.

V-219, -226, and all other models in which the changer is fastened in cabinet, are designed to operate WHEN THE CHANGER AND CABINET ARE LEVEL. Always make landing and feed -in adjustments under these conditions.

12'

t h-71 MiMlllpl O

y' 2C o sió-ut." THREAD THREAD 5/16 STOCK

4-REß'D

%4-20 OR Siïb 18 tels 4CAP

12.

III

STD. ' PIPE

-

y4 - 20 OR RUBBER CAP 5416-18 BOLT 4 UNITS READ

Legs can be used to support a record changer in level position at a convenient

height above work table. The legs can be made from threaded rod,

or from pipe fittings, as shown above.

NEW SW. STOCK NO. 38995

ORIGIN4L SW. STOCK NO. 36529

Original and new motor switch for automatic shut-off in manual operation

on RP -152D and RP -153.


12 RCA

CHANGES 1JOTES, DATA

HOLDER FOR RECORD CHANGER

Essential in Servicing: In servicing an automatic record changer, it,

is essential to have some kind of a holder or stand to support the mechanism in a level position at a convenient height above the work table to permit easy access to all parts under the motorboard.

Adjustable stands can be purchased, or assembled from pipe fittings as shown in the accompanying sketch.

The simplest and cheapest type of holder is made by using legs that screw into the motor - board -mounting -screw sockets. Such legs can be made from pipe fittings or from threaded rods as shown in the sketches. One end of each leg has a i-20 thread to accommodate most RCA changers, and the other end has a 5/16-18 thread to accommodate the RP -151 mechanism.

SIDE VIEW

RCA MFG. CO., INC.

DO NOT TOUCH THIS TONE ARM I

when playing either one or more records automatically, to avoid possibility of dis- turbing Automatic Adjustment. Just Push a Button-There's Your Record Program.

Iii The following parts are required for the

record -changer holder shown above. These parts can be obtained in hardware or plumbing shops. Drawing Number Description Quantity

1 -in. ell 2 lei-Qi ,Ili 2 t -in, all -thread nipple....2 ¡Ili: 3 t -in, gas -pipe locknut....2 4 -in. x 15 -ink pipe 2 5

6

t -in. 4 -way ell on side outlet tee 2

1 -in. x 14 -in. pipe 1 7 (optional) t -in. x 3 -in. reducer 1 8 t -in. x 15 -in. pipe 1

V 9-10. 4 -in. to t -in. bushing ....I 11 (optional) t -in. std. nut and 5/16 -in.

std. nut 2 each 12 t -in. x 1t -in. std. and

5/16 -in. x t -in, std. bolt 2 each

13 1 -in. awning eyelet 2 14 I -in. pipe cap 4

An adjustable holder for automatic record changer mechanisms can be made from

pipe fittings as shown above.

RP -152D, -153, QU7 Automatic Motor Switch:

Some models of RCA automatic record changers incorporate a switch that acts to shut off the motor when the pickup needle is 13 inches from the spindle, and also when the pickup is moved out to its rest position.

The original switch, Stock No. 36529, is superseded by an improved switch, Stock No. 38995. When installing- the new switch, remove the angle bracket that is used between the motor board and the original switch.

VHR.-202, -207, -307, -407 Crystal Pickup is No. 37158

In the Service Data for these home -recording models, the pickup cartridge is incorrectly listed as No. 33905. The correct Stock Number is 37158. This correction should also be noted in the tabulation on page 5 of "Supplementary Information No. 5."

The label reproduced above is fastened to the record changer in Models V-215, -219, -221, and -225.

These mechanisms are designed for completely automatic operation on a stack of records or on a single record.

Customers sñoutd be instructed to use the START -REJECT button and not to handle the tone arm.

Note: If item 13 is not obtainable, change item 2 to 2I -in. nipples, and drill 5/16 -in. holes close to one end to accommodate the motor- z_ board mounting bolts.

TRIP LEVER

SP RIN

TRIP 7PAWL

PIN REMOVED

Original trip lever with corner cut off to prevent lever striking the ratchet.

STEEL SPRING e399G1 HOLE ADDED QINI into

il

TRIP TAB 'PIN LEVER REMOVED REMOVED

TRIP PAWL

Trip lever with new steel spring. This steel spring can be installed on original

lever in place of bronze spring by drilling a 3/32 inch hole and

cutting off the tab on original lever.

r- _-- rIDLER

RP -151, -158, -160, -162 Trip Lever and Trip Pawl Spring:

The original bronze trip -pawl spring, Stock No. 38362, is no longer available. When this spring requires replacement, due to loss or irreparable damage, it is necessary to install either a new steel spring, Stock No. 39961, in accordance with instructions given below, or else install a complete new trip lever assembly which employs the steel spring.

In RP -151, the new trip lever, trip pawl, and steel spring assembly is Stock No. 38561

In RP -158, -160, and -162, the new trip lever, trip pawl, and steel spring assembly is Stock No. 38632.

The new lever and spring assemblies will be supplied on orders for the original assemblies.

Installing Steel Spring No. 39961 on Trip Lever: 1. Drill a 3/32 -inch hole in lever as shown. 2. Cut off the tab that was used to anchor the

original bronze spring. 3. Install steel spring as shown.

TRIP LEVER PIN Original trip lever assembly with Bronze

spring.

MOTOR SPINDLE

OTOR

SPRING FLUSH W END OF SPINDLE ( MOUNT TURNS

TIGHT TOGETHER;

Spring sleeve installed on 60 -cycle motor -nindle for operation on 50 -cycle supply.

REVISED RATCHET LEVER

In RP -158, -160, and -162, continuous tripping can be- caused by failure of the ratchet lever to bldck the drive cam pawl at completion of a change cycle.

This has been corrected by doubling the thickness of the end of the ratchet lever so that it presents a broader face to the edge of the drive cam pawl. The lever with double thickness is carried under the same Stock Number (38656) as the original lever, which it super- sedes.

ORIGINAL RATCHET

vEcR

TRIP PAW LContinuous tripping in RP -158, -160, and

-162 can be caused by failure of the rochet lever to block thé drive cam pawl. The replacement lever has double thickness at end to pre-

sent a broader face to the drive cam pawl.

DRIVE CAM PAWL

REVISED RATCHET LEVER

DRIVE CAM PAW L


RCA PAGE 13-13

RP -151, -158, -160, -162 Crystals and Sapphires:

The following Stock Numbers for crystal - and -sapphire assemblies supersede all previous listings:

RCA MFG. CO., INC.

Zinc -cased crystals have letters "ZN" cast in the metal.

Use only zinc -cased crystal No. 39550 for RP -160. This can not be used in RP -151.

Do not replace complete pickup where sapphire only requires replacement.

RP Used in Models Stock No. of Sapphire and Holder, less nut- Stock No. of Crystal and

Sapphire Assembly - 151 V-225 38449 Top, 39919 (Alum. case)

Bottom, 38598 (Alum. case) 158 V-175, V-209, V-210 39564 38610 160 V -2I5, V-219, V-221 38449 39550 (Zinc case)

162 V-135 39564 38610

RP -160 Sapphire Pressure:

The correct sapphire pressure in RP -160 is approximately 13 ounces. The pressure is governed by a spring inside the end of the pickup arm. Owing to the fact that' both aluminum and zinc castings (with difference in weight) have been used for the arm and the crystyj, and also that only the zinc crystal (Stock No. 39550) is supplied for replacement,

it is necessary to check the sapphire pressure whenever either the crystal or the arm is replaced.

The zinc arm is identified by the letters "ZN" after the drawing number inside the arm.

The zinc crystal is identified by the letters "ZN" moulded at the rear end of the cartridge.

The various combinations arc tabulated below, along with the Stock, Numbers of pivot arms and springs involved.

ARM AND CRYSTAL COMBINATIONS CORRECT ARM AND SPRING

Aluminum arm Stock 38650 Aluminum crystal Stock 38453

Picot arm Stock 38603 Pivot arm spring Stock 30585

Aluminum arm Stock 38650 Zinc crystal Stock 39550

Pivot arm Stock 38603 Pivot arm spring Stock 30585

Zinc arm Stock 39671 Zinc crystal Stock 39550

Pivot arm Stock 39672 Rivet for arm and spring Stock 39674 Pivot arm spring Stock 39754

Zinc arm Stock 39671 Aluminum crystal Stock 38453

J

)}

Pivot arm Stock 39672 Rivet for arm and spring Stock 39674 Pivot arm spring Stock 39673

60 TO 50 CYCLE CONVERSION For Rim -Drive Phono Motors:

(These instructions supersede all 'past issues, covering the use of shrunk sleeves.)

A spring sleeve is used to increase the diameter of the motor drive spindle, to compensate for the slower speed of the motor when used on a 50 cycle line.

Spring sleeves are available for the following

models which comprise most of the motors using spindle drive manufactured to date.'

To apply the spring -sleeve to the motor spindle, lock the rotor matually and press spring gently over end of spindle, twisting the free end of spring counter -clockwise (to unwind coil) until following end of spring is flush with end of spindle.

The ends of spring should not protrude, and all coils should be close together, allowing a flat even surface on the motor spindle to con tact the rubber drive.

Model No.

MOTOR

RP No.

Spring -Sleeve

Stock No. Dwg. No. Stock No.

V-100 91647-3 36404 39681 V-101 V-102 .." " V -I05 4i 4«" QU56-C 92127-1 36984 " QU56-M " " "

V-135 91647-5 39301 RP -162 39750 V-140

V-175 91706-1 38612 RP -158 39748 V-209 V-210 " " " " QU51-M " " RP -152R ..

QU52-C " " RP -152S " QU52-M " " RP -152R " QU55 " " RP -152R " V-215 91655-1 36254 RP -160 39749 V-219 or 91655-6 36254 RP -160A V-221 " " RP -160B "

i, V-225 91845-1 38557 RP -151 " QU-51C 91655-6 36254 RP -145E QU5 91655-6 34364 RP -145E "

CHANGES

NOTES,DA!A

IMPROVED TONE ARM RETURN

LEVER

Stock No. 39751

The tone arm return lever in RP -158, -160, -162, has been revised to incorporate two important improvements:

(1) A cam to adjust landing position on 12 - inch records.

(2) A positive -acting feed -in lever and spring. (This pushes the tone arm in toward the music grooves after the sapphire has landed - on the record.)

This revised lever, Stock No. 39751, super- sedes the original lever, Stock No. 38618.

12 -inch Landing Adjustment: When adjusting a mechanism that has this

revised lever, make the 10 -inch landing adjustment in the usual manner as specified in the service notes. Then check landing on a 12 -inch record and adjust the cam if necessary. The correct landing position for 12 -inch records is 53 inches from the sapphire to the nearest side of the spindle.

Feed -in Spring Adjustment: The feed -in spring (Stock No. 39752) is

hooked in one hole on a bracket that has three spaced holes to permit coarse adjustment of feed -in tension. Fine adjustment can be obtained by bending the bracket.

CAM FOR 14'+ LANDING AI,JUS r ME NT

FEED -IN LEVrR

Y,Y11111111111

1 FEED- IN SPRING,

TONE ARM vae ril R LE VER

'Stock No. 39751 tone arm return lever has a cam to adjust 12 -inch landing position,

and a positive acting feed -in mechanism. The feed -in tension can be adjusted by hooking the spring

in a different hole on the bracket, and by bending

the bracket. RP -158, RP -162

Tone -Arm Resonance:

Chatter at frequencies near 2,500 cycles on some 1st production RP -158 or RP -162 mechanisms is caused by tone -arm resonance which can be eliminated by inserting a block of viscoloid (t in. x t in. x 3/16 in.) in the arm as shown. The viscoloid block is No. 39949.

GUARD SCREW

VISCO LO ID BLOCK

ACETONE

PICKUP

.Viscoloid damper (No. 39949) minimizes tone arm resonance in RP -158, -162.


14 RCA

BALLAST TUBES RCA MFG. CO., INC.

RCA Resistor Ballast Tube Data

(Nos. in parenthesis are original designations)

801. (HOT) 30 n (COLD)

BK -36-C (95-K2) STK .*30284

40n(HOT ) 25 n (COLD)

4p n (HOT) 151L (COLD)

ï01t O © ©

© O

K -36-F STK. * 31005

4O9. (HOT) 15 n (COLO)

1350 \

BK -42-B (135-K1)

STK. *14649 BK- 49-B STK.432544

40n(HOT) 15 n(COLD)

1350 \

BK -55-B STK.* 31198

409. (HOT) 150 (COLD)

1709. \\(_Q 185n

BK -61- B (BK -61-H) 5TK. *31585

K -6I -F STK.* 31019

409- (HOT) 259- (COLD)

40n (HOT) 25 it (COLD)

0 0 1

0©1501L 286 n

0 © © O

K-61- H STK.* 32109

B -86-A STK.* 33793

40n (HOT) 29n (COLD)

\O O 175n oimitee

O©6 01. © o 260 -XI

STK .*30300

409. (HOT) 20n (COLD)

495- K1 STK.*30599

4On. (HOT) 15 n (COLD)

755'.

27--_ (HOT 1021. (COL

K-83747-6 (BK- 36-8)

STK. 3 31577

(1.OT) 30;_(COLD)

51ofL

J `loon

K-85277-3 STK.* 32247

40n (HOT) 15 a (COLD)

40sL (HOT) 15n (COLD)

2.301. \

210 n

K-85277-4 STK. * 32850

K-85277-5 STK. *32849

O4 (HOT) 5A (COLD)

O4O O o © © o

9ÄjCÓ ó)

10011

M-86892-1 STK.* 33811

40.11040T) 404 (NOT) 159.(COLD) 15.n. (COLD) 0

O © (909 Q ©

© O 205 0.

M-86892-2 STK.* 33812

28Or- 280:_ \

2809.

M-86892-3 STK. 33813

205n.

loon

1451E

M-86892-4 STK. % 33947

2309_ i 3709-

M-86892-6 M-86892-7 STK.* 34563 STK. *34458

4On (HOT) 309- (COLD) 4369-

(HOT)

M-86892-8 STK.* 34605

40.9- (HOT) 8309. IS:. (COLO) (NOT) 1359-

809.

100,9.

O0 0©

o © © Q 4O: (HOT) , Isn(cOLq, 400. (HOT)

15fi (COLD)

M-86892-9 M-86892-10 STK. * 35000 STK. *35183

30A 440 n

1000 n

15004

22009.

M -86892-I1 STK. *37847

M-91462-1 STK. * 35748

4.5 n

M-91462-2 57K.* 35635

óO9-

18511.

340.n. 4804

M-91462-3 STK. * 37891

4609. Zoon \

4809- M-91462-5 STK. * 37983

o0 O ©

200n O© © O

M-91462-6 sTK. * 38289

559-

M-91462-7 MI -8159-I

300 n

OO O ©loon

O© 1000

M-91462-8 M-95178-10 STK. >R 39346 11-8159-2

2300n

K -920117-I STK.* 38702

K-920146-1 STK. * 39575


RCA PAGE 13-15

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i ©John F. Rider


16 RCA

Y

MODELS 24BT-1,24BT-2 Chassis RC -1004F

LI 3GA

ANT. TO GRID 1.5 X

(Goo KC)

BOTTOM VIEW OF TUBE SOCKETS

RCA MFG. CO., INC.

CONV. GAIN 22 X I 6X- 120 X I .9X L 28 X

(600- 455 KC) (455 KC) (455 KC) (455 KC) (400 n) MEASURED WITH 1.5 V. FIXED BIAS

L2 0 4A

- CI

C9 C10 3-25 Ì1_442.2

O. I

RI 3.5 MEG.

T

IA7GT IST DET. G. OSC.

0 0 0...--.,0

so S.. G. 50V

C._

* -9v. (Goo KC) - 15V. (1500 KC)

- 3.5 V. APPROX. MAX AVC.

P-923033-1 24BT1,2 (RC 1004F)

IST I.F. TRAN,.

I NSGT I. F.

,_ ..., calk",

s 02 ÿ i IP 2 o LE 90v.

Ó TRANS.

-l--i---

IHSGT 2NDDET.-AF. ecAVC.

ú 1úRN

C12# #C13 15-90 LS óL6 15-90 uuz ,121. R3 L__ -----J

WM or RED-

:C2 .05

R2

220

_1 1.5V. FIXED RIAS

DATA FOR

G

L

90V.

r C14

15-90 LT

1 , I2.4

R4 V1M 10 MEG.

Ió C3 -_Y

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GRN

ß ytCIS po L3

15-90

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.0018

/ A ñ

64 V.

RG _ VOL.CONTR

I MEG.

R7 lo MEG.

OSCILLOGRAPH CONNES VERTICAL "HI' TO THIS POINT VERTICAL 'O' TO CHASSIS.

20X (400 ni)

RB íS 1 MEG.

5Q50T OUTPUT

R9 2.2 MEG.

JREQUENCY RANGE 540-1,720 kc

INTERMEDIATE FREQUENCY 455 kc

Cathode Ray Alignment is the preferable method. Connections for the oscillograph are shown in the diagram.

Output Meter Alignment.-If this method is used, connect the meter across the voice coil and turn the receiver volume control to maximum.

Test Oscillator.-For all alignment operations, connect the low side of the test oscillator to the receiver chassis, and keep the output as low as possible to avoid AVC action.

Electronic Voltmeter.-The electronic voltmeter in the Chanalyst or VoltOhmyst provides an unexcelled output indicator. It should be connected to the AVC bus.

Pre -Setting Dial.-With gang condenser in full mesh, the pointer should be adjusted so that it is horizontal.

Step Connect high side gtest of test osc. to-

Tune osc. to-

Turn radio dial to-

Adjust the follow - ing for maximum

peak output

1 I -F grid

in series with .01 mfd.

455 kc Quiet point between 550 and 750 kc

C14, C15 (2nd I -F Trans.)

2 1st Det. grid in series with

.01 mfd. C12, C13

(1st I -F Trans.)

3 Antenna terminal in series with

220 mmfd.

1,720 kc

Tuning condenser

rotor plates all out

C17 (osc.)

4 1,300 kc 13 t0 0

1c C9 (ant.)

Precautionary Lead Dress. - 1. The lead from the 3Q5 plate to output transformer should be

dressed under clip and away from audio input leads. 2. Keep AVC lead connecting Cl away from the 1A7GT plate. 3. Keep blue plate leads coming from IF transformers short and

close to the chassis. 4. All filament wires should be dressed close to chassis.

CI611 10

MED.

TO FIL.

LA edN

52 -ED SW- ON

VOL. CONT R.

RIO wNTE _39O

B YELLOW

BATTERY CABLE PLUG (PRONG VIEW)

APPROX. GAIN DATA USING RCA RIDER CHANALYST

T1

VOLTAGES SHOULD HOLD WITHIN *20Y. WITH RATE O BATTERY SUPPLY.

* MEASURED WITH CHANALYST OR VOLTO H MYST.

BATTERY DRAIN 25 amperes ,B 14 m.3.

MAX. POWER OUTPUT 3 wat -

LOUDSPEAKER (5 -inch PM) Identification number RL -85-6 .... 92322-1 Voice coil impedance at 400 cycles 3 ohms 3 ohms

\ C9 -ANT 1300 Kc C12 -C13 Z C -c

455 t415

KC 455 KC.

+v IST.I.F

TRANS

ADAPTER CABLE

(z) THREE SEPARATE PLUG-IN BATTERIES

CHASSIS

BATTERY CABLE

BATTERY PACK

(1) '4-B' PACK BATTERY

24BT1-2

(3) THREE SEPARATE TERMINAL BATTERIES


RCA PAGE 13-17

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MODELS 25BK,25BT-3 Chassis RC -1004B CV -42 Electrifier

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18 RCA MODELS 25BK,25BT Chassis RC -1004B Electrifier CV -42

BLACK GROUND

RCA MFG. CO., INC.

'A -B" PACK BATTERY 1.5v. "A"- 90 V. "B"

' L-- - - - - -

1

BLUE/ ANTENNA

WHITE JBROWN

\ 4- ADAPTER 'I

CABLE.

ül i

BAT TERY CABLE

"...se -7z R YELLOW +45

45

45

ALTERNATIVES THREE SEPARATE THREE SEPARATE

PLUG-IN BATTERIES TERMINAL BATTERIES

Precautionary Lead Dress:- -

1. All filament wires should be dressed close to chassis.

2. Keep AVC lead cónnecting .1 Mfd. Filter to Ant. Coil away

from 1A7GT plate.

8. Keep grid lead coming from first IF transformer short.

4. Keep Blue leads coming from IF transformer short and close

to chassis.

5. Keep grid leads of 1N5GT and 1A7GT tubes away from each

other.

BLUE

ANT

GND

l fi \\ SHOWN WITH

GANG AT MAX. CAPACITY.

DRIVE CORD

POWER SUPPLY 05-125 V.

SO -60.., OR DC.

Circuit of CV -42 Elettrifier

ANT. COIL

C19 .05 BLUE,

ANT

AND

ADD THIS CAPACITOR 220 MMF.

DRUM

34. TURNS

C19 .05

ADO THIS JUMPER

A" SOLDER TO CHASSIS

Remove any external ground connections when using the Electrifier.

CAUTION: Turn power switch off (counter -clockwise) when installing or replacing tubes or batteries.

DO NOT TURN THE "BATTERY -ELECTRIC" SWITCH TO ELECTRIC POSITION WHILE THE RECEIVER IS

CONNECTED TO BATTERIES.

On a DC power supply, if no reception is obtained, reverse the plug in the outlet and retuve. Om an AC supply, reversal of the plug may reduce hum. CAUTION! Do not touch Radio Chassis unless power plug is removed from sobket.

Step Connect high

side of test osc. to- Tune

test -ose. to- Turn

radio -dial to- Adjust the f ollow- ing for maximum

peak output

1 I -F grid, in series with

.01 mid. 455 kc

"A" Band, Quiet point

between 550 and 750 kc

C14 and C15 (2nd I -F trans.)


.01 mid. C12 and C13

(1st I -F trans.)

3

Antenna terminal in series with

220 mfd.

18 me 18 me C17 (Osc.)

4 1720 kc

Tuning condenser


C22 (Osc.)

5 600 kc 800 kc C29

(Rock )

6 1300 kc 1900 kc signal

C9 (Ant.) C25 (Det.)

7 Repeat steps 4, 5, and 6

8 Antenna termina(

in series with 300 ohms

11.5 me1.5nß 11.5 me C94 (Ant.)

TO PLATES AND SCRes.%

51

CABLE PLUG (PRONG VIEW) TERMINAL MARKINGS APPLY WHEN USING CV42 ELECTRIEIER

owner 2150 OERAF IF 30567 1NSGT INSET

52 s A

SwITCN ANN/NAGLE CONTROL

R1 2.2 Meó

R/4 050

53

RE IST DET05C INERT 1A -76T

Rtl RIO 390 390

C23 10 MFD.

CIE lo MFO

Simplified Diagram of Filament Circuit when using CV -42

Hum Modulation on Model 25BT9 When Using CV -42 "Electrifier."

The following changes should be made in cases where hum modulation is experienced when operating Model 25BT3 from a CV -42

electrifier power unit. It is not necessary to remove the chassis from the cabinet to make these changes.

(1) Connect a 220 mmfd. molded mica capacitor in series with the blue antenna lead as shown.

(2) Disconnect the black ground lead and C19 from the bottom lug on the antenna coil. Connect a jumper from this lug to chassis. Connect the black ground lead to C19 and tape the joint.

ORIGINAL CONNECTIONS 2SBT 3

NEW CONNECTIONS 2 Err The original and revised connections are shown at left.


RCA PAGE 13-19

RCA MFG. CO., INC. MDDEI. 25BP, Chas .RC -527D

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©John F. Rider


20 RCA

MODEL 25BT-2 RCA MFG. CO., INC. Chassis RC -1004A CY.42 Electrifier

POWER SUPPLY 1 "A" "B" 11-90 volt pack. Model 25BT2 can be operated on 105-125 volts AC, 50-60 cycles,

or 105-125 volts DC. by means of a RCA CV -42 Electrifies-. BATTERY DRAIN MAXIMUM POWER OUTPUT 3 watt "A" 3 amperes "B" 10 m.a. (Switch at "Battery Saver" position) "C" 14 m.a. (Switch at "Maximum Output" position)

POWER CONSUMPTION With CV -42 Electrifier Unit 22.6 watts

LOUDSPEAKER (5 -inch PM) Voice coil impedance at 400 cycles

RL -85-6 92322-1 3 ohms 3 ohms

Step Connect high side gtest of test osc. to-

Tune osc. to-

Turn radio dial to-


peak output

1 I -F grid

in series with .01 mid.

455 kc Quiet point between 550 and 750 kc



01 mfd C12, C13

(1st I -F Trans.)

3


200 mmfd.

1,720 kc

Tuning condenser


C17 (osc.)

4 1,300 kc 1,300 kc

signal C9 (ant.)

5 455 kc Quiet point


Adjust C22 for minimum output

on strong 455 kc signal

Precautionary Lead Dress.- The lead from the 3Q5 plate to output transformer should be dressed under clip and away from audio input leads.

2. All filament wires should be dressed close to chassis. 3. Keep AVC lead connecting Cl to antenna coil away from the

1A7GT plate. 4. Keep blue plate leads coming from I.F. transformers short and

close to chassis. 5. Keep yellow leads connecting to oscillator coil away from trap coil. 6. Keep grid lead of 1N5GT RF tube away from 1A7GT grid.

1.

ANT. TO GRID 3X IX

(600 KC) (6OO KC)

DO NOT CONNECT INSGT TO GROUND WHEN R.F USING ' ELECTRI FIER'

BOTTOM VIEW of ruse SOCKET.

RI 3.3 MEG

- 3.2 V. APPRO%. MAX. AVG.

VOL. -

OH VOL. CONTROL

CIO 0-442.2

CONY. GAIN 24 X -+ .4x

(6OO- 435 KC) (455 KC) MEASURED WITH 1.5 VOLT FIXED

WIELD

t

e R12 5600

L11 28A

C22 10-70

I( -9V. (600KC) -13V.(1500KC)

BATTERY CABLE PLUG

(PRONG VIEW)

IA7GT IST OCT Et 05C.

LS C11 ßA

0 136.6

S3 FRONT

I ET TRANS.

POWER SUPPLY 105-125 V.

SO -60,- OR DC.

Remove any external ground connections when using the Electrifier.


DO NOT TURN THE "BATTERY -ELECTRIC" SWITCH TO ELECTRIC POSITION WHILE THE RECEIVER IS CONNECTED TO BATTERIES.

1 40X (4 400...)

BIAS

Sox I .1X 55 KC) (455 KC)

INS OT I. F.

[LO

I

22x APPROX. GAIN (400...) MTA MEASURED

WITS RCA RIDER CHANALYST

IIA5GT 3Q5GT 2HD OET-AR & AVC. OUTPUT

/ 2 N I.F. 90V. TRANS.

Ir

R4 IO MEG.

94 REAR'

OSCILLOGR.

VETVOTL TO THIS POI., VERTICAL`O" Tb CHASSIS

1 MEG

.001aI

R6-1ME6 VOL.CONTR

° C20 3 0 25 390 MED.

-7.4V. BATTERY SAVER POSITION -5.2V. MAX. OUTPUT POSTION

POWER SW. VIEWED FROM FRONT SHOWN IN P061TION No I

POSIT ON I_ BATTERY SAVER PO `ION 2- MAX OUTPUT -BATTERY POSITION 3- AC -DC OPERATION

R9 2.2 MEG.

VOLTAGES SHOULD HOLD WITHIN 420% WITH RATED SUPPLY VOLTAGE

M. MEASURED WITH GHANA LYST OR VOLTOHMYST.

P-923022-3 256,2 (RC 1004A)


RCA PAGE 13-21

MODEL 25X, Chas.RC-100

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©John F. Rider


22 RCA 11ODELS 26X -1,26X-3 Chassis RC -1014A RCA MFG. CO., INC.

FREQUENCY RANGE Broadcast 540-1,720 kc Short Wave 8.7.15.6 me


PILOT LAMP Mazda No. 51, 6-8 volts, 0.2 amp.

POWER OUTPUT Undistorted 0.9 watts \laxitituln 1.4 watts

LOUDSPEAKER Rl. -81132 "PM," or RL -86B1, 'E11." Size 5 -inch V.('. Impedance 4 ohms at 400 cycles

POWER SUPPLY RATING 195-125 volts, AC, 50 or 60 cycles, or DC Precautionary Lead Dress 1.

2.

3.

4. 5.

ti.

30 watts

Dress output tubeplate lead to speaker and output bypass denser away from terminal board and yellow lead in cable.

Dress brown and yellow leads front 2nd I.F. transformer away front output plate and bypass condenser. Dress .02 capacitor C12 away front output capacitor C16. Dress all leads or parts as far as possible away from oscillator coil. Dress lead front C13 to band switch down along front apron of chassis. Dress lead front trimmer condenser on loop to S.W. Ant. coil around outside of rectifier tube. Other leads between rectifier and R.F. tube.

con -

`05(

1200CC t/ ®D5C7 6600KC

/!ó *w+Mw 1 eVE TRAG

AN7. toa / 9.SMC 4551(C

ANT. 4`

ID

C 22(Td4) 15MC.

O

e C21

C20

e C24

15MC.

.F. C28,C29d55Kt. TRtilANS.

125A7

C30 C31 455KC 2RI.LF.

TRANS.

ANT TO GRID

17 4X -

( GOO KC )

0 SHORT WAVE ANT. WIRE IN BKK OF CAINNET

La 1 JANT

NT. 9SMC

LOOP

1.25X (DOO KC)

25G7 RF

R17 20 .1M

Steps Connect high side

of the test oscillátor to-

Tune test osc. to- Turn radio

dial to- Adjust the follow - ing for maximum

peak output

1

I.F. grid in series with

0.1 mfd.

455 kc Quiet Point at 1,700 kc end of dial

C30, C31 2nd I -F trans.

2 1st det. grid

in series with 0.1 mfd.

C-28, C-29 1st I -F trans.

3 R.F. grid


C-27** Wave trap

4 Ant, terminal in series with

47 mmf. (link open)

15 me C15," Ban me

d C-24 (osc.)* C-22 (ant.)

5 9.5 me 9.5 me

"C" Band L-10 (osc.) L-5 (ant.)

6 Repeat steps 4 and 5.

7 Ant. terminal in series with

220 mmf. (link open)

1,300 kc 1,300 kc A" Band

C-25 (osc.) C-23 (ant.)

8 600 kc 600 kc A Band C-28 (osc.)


( w 1C23 - ANT. 1300KC

CON V GAIN I 40 x 1- B X 200 X

(6D0-4S5KC)I(455KC) (455KC) MEASURED WITH SV. FIXED BIAS

*Use minimum Callao ty peak if two peaks can be obtained. **Adjust C-27 fór minimum signal with 455 kc applied to R.F.

grid.

12 SA7 BOTTOM VIEW OF TUBE SOCKET5

IsTDET.b OSC. 150 0.2

* -2V (LOoKc) -Av (*30000 -OSv(BMC1 -4v (I6NC)

SV

r -

ené C2B1 K I

LL13 LIA aeGr

rT1n

RA RS

2,000 15MEG.

C4 4T

125K7 LF.

Note. -Oscillator tracks 455 kc above signal ou all bauds.

J X _I(455 KC )

52

SO X (400

12SQ7 2!O DET.-A.F.-AVC.

Z'TP IF TRANS

©eo

0 ei 4dr

15X (400ti)

35L6 GT OUTPUT


Say

CIS 5

1 GRIEN Rene

-C29 C3D1 75-160 75-1G0'e

RED 1 LIS L. FIvELLCW

xSV APPROK NAK AVC

.=1 BLACK

C51 I

79- t4 J

C,>L .Doer 7

VÓLCONTROL 500,000 C12

11.02

C 1

v_ RED

2AOR BLS

BLUE Hn

gee 1 C21 °` ^'S,=rf` TS:2. á g(¡ #C22-

no FaLS , its 7c35

<O L j I.01

LC LOOP 1.5a

7

Sv FIVES I

BIAS FOR 1- AANT GAIH -

Ì23 DATA

-10

35Z5GT RECT.

t, 11.11 © A 6A550 01 ©

CES

SuPt v O C2t-Aso -Goo

FRONT 1SrANA¢OOADCAST(Lco..1 5 QjSANDADROADST NORwAITc(

H SNOWN tr.

OSTI ~- PNONO O N BAND SPREAD SNORT JAiN

N e PHCNc (1E.,cRw1TONG) N)

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* MEASURED WITH CHANALYST OR VOLTOHMYST

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R S23034-4 2G01 (RC 1014)

R M. SPEAKER

CLOSE LINK FOR LOOP OPERATION CHASSIS

OROUND

©John F. Rider INDICATES COMMON WIRING INSULATED FROM CHASSIS


RCA PAGE 13-23

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MODEL 261-4, Chas .RC -1014B


24 RCA

MODEL 26X-4 Chassis RC -1014B RCA MFG. CO., INC.

FREQUENCY RANGE Broadcast 535.1,600 kc Short Wave 8.7.15.8 me

Intermediate Frequency 455 kc

PILOT LAMP Mazda No. 51, 6-8 volts, 0.2 amp.

POWER OUTPUT Undistorted 0.9 watts Maximum 1.4 watts

LOUDSPEAKER RL -81B2 "PM," or RL -86-B1 "EM." Size 5 -inch V.C. Impedance 4 ohms at 400 cycles

POWER SUPPLY RATING 105-125 volts, AC, 50 or 60 cycles, or DC 30 watts

Push Button

i /.NTTNNA-_

..... l, V. 4 3 2 1

-050ILATOK APMTKNT3 , AD.AASTM[NTS

sT5Oo rT3O0 TÓs 1590 /4201420030 1100 KC KC KC KC KC

EXT. AN?.- f 2 3 y-NECOIC-PLATER CONNECTION Tee get

) CONNECTION

REMOVE LINK' WHEN IRING EXT ANTES

o

The station push buttons connect to separate magnetite -core oscillator coils and separate antenna trimmers which must be adjusted for the desired stations. Use an insulated screwdriver or alignment tool such as RCA Stock No. 31031. Allow at least five minutes warm- up period before making adjustments.

In the event that the receiver is to be used with an external antenna use one or two feet of wire (as an antenna) to ensure sharp

3 2 1

PUSH-BUTTON RANGES One station between approximately 540-1,100 kc One station between approximately 610-1,250 kc Two stations between approximately 750-1,420 kc One station between approximately 950-1,560 kc

Adjustment peaking during the final adjustment procedure. For loop operation, the link should be strapped across terminals on back of set. In either case the procedure is as follows:

1. Make a list of the desired stations, arranged in order from low to high frequencies.

2. Turn the range selector to "A" band, and manually tune in the first station on the list.

3. Turn range selector to "PB" position, push in station button No. 1 (extreme left). Then adjust the No. 1 oscillator core to receive the station.

4. After oscillator core is set correctly, adjust No. 1 antenna trimmer for maximum output.

Clockwise adjustment of cores and trimmers tunes the circuits to lower frequencies.

5. Adjust for each of the remaining stations in the same manner.

8. Make a final careful adjustment of the oscillator cores and antenna trimmers.

On the 950 to 1,560 kc push-button, the higher frequency stations may be received with L24 either in or out (oscillator frequency either 455 kc below or 455 kc above the station frequency). The adjustment with this core in its out position (oscillator frequency 455 kc above the station frequency) is the correct one.

Alignment Procedure Test Oscillator.-For all alignment operations, keep the output as

low as possible to avoid a.v.c. action.

Output Meter Alignment.-If this method is used, connect the meter across the voice coil, and turn the receiver volume control to maximum.

Calibration Scale.-The glass tuning dial may be easily removed from the cabinet and temporarily attached to the dial backing plate for quick reference during alignment.

Power Supply Polarity.-For operation on d -c, the power plug must be inserted in the outlet for correct polarity. If the set does not function, reverse the plug. On a -c, reversal of the plug may reduce hum.

C28,C29-455KC.

LOOP w C23-ANT.1300KC

Steps Connect high side

of the test oscillator to--

Tune teat osc to- Turn radio

dal a to- Adjust the follow - ing for maximum

peak output

1 I.F. grid




2 1st det. grid


C-28 C-29 lst I -F trans.

3 R.F. grid


C-27 Wave trap


47 0303!. (link open)

15 me 15 me

C" Band C-24 (osc.)* C-22 (ant.)

5 9.5 me 9.5 me

"C" Band L-10 (ac.) L-5 (ant.)



220 mmf, (link open)

1,300 kc 1,300 kc

A" Band C-25 (osc.) C-23 (ant.)

8 600 kc 600 kc A" Band C-26 (osc.)


*Use minimum capacity peak if two peaks can be obtained. **Adjust C-27 for minimum signal with 455 kc applied to R.F.

grid.

Note.-Oscillator tracks 455 kc above signal on all bands.


RCA PAGE 13-2e5

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MODEL 27K,Chas.RC-567 RCA MFG. CO., INC.

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28 RCA MODEL 28T,Chas. RC -569

RCA MFG. CO., INC.

Test-Oscillator.-For all alignment operations, connect the low side of the test -oscillator to the receiver chassis, and keep the output as

low as possible to avoid a -v -c action. Electronic Voltmeter.-The electronic voltmeter in the Chanalyst or

VoltOhmyst provides an unexcelled output indicator. It should lie connected to the AVC bus, and the test -oscillator output adjusted to produce several volts of AVC.

Calibration for Alignment.-The dial calibration for alignment purposes can be set up in two ways:

1. The dial may he very easily removed from the cabinet. The condenser plates should then be turned into full mesh, the pointer adjusted to the scratch at the left end of the dial backing plate, and the dial placed on the frame so that its extreme left calibration mark coincides with the pointer. The dial may be held in place with scotch tape. In this manner the actual receiver dial is used for alignment. When alignment is finished, the scale should lie replaced.

2. A calibration scale is attached to the tuning drum. The correct setting of the gang, in degrees, for each alignment frequency is given in the alignment table. Check the position of the drum, making sure that the 0 degree scale mark is horizontal with the gang in full mesh.

Pointer for Calibration Scale.-If method (2) is used, improvise a

pointer for the calibration scale by fastening a piece of wire to the chassis, and bend the wire so that it points to the O degree mark un the calibration scale when the plates are fully meshed.

C9 -A DET 1500 KC.

( L'

?. CIO- B DIT. 6.1 MC.

BOT TOM

i

C 11-C'DET 15.2 MC.

ee- C3- 6'ANT 6.1 MC.

&I_CI-C'ANT- 15.2 MC

te_C 12 2C' DE T. 9.5 MC.

50419

Á OSC 0 KC.

VIEW

C 17 -"C'OSC. 15.2 MC.

17

29 T q

L I2 -'A oSC.l3 6o0 KC

Cathode -Ray Alignment is the preferable method. Connections for the oscillograph are shown in the schematic diagram.


External Antenna.-For best reception on "C" band with an outside antenna, adjust C2 for peak output on a station in the 31 -meter

band.

Steps Connect the high

side of the test-osc. to-

Tune test 06c. to- Turn radio dial to-

Adj. the following for max. peak

output

1 I -F Grid

in series with .O1 mfd.

456 kc "A" Band

Quiet Point between

550-750 kc

L-15 and L-16 2nd I -F Trans.

2 Det. Grid


L-13 and L-14 1st I -F Trans.

3 Ant. terminal in series with 200 mmfd. (link open)

1,500 kc 1500 kc (160°)

"A" Band

C-19 (osc.) C-9 (Det.)

C-5 (on loop)

4 600 kc 600 kc (30.5°) L-12 Rock Gang

5 Repeat (3) and (4)

6

Ant. terminal in series with

22 mm fd. (link open)

6,100 kc 8,100 kc (181°)

"B" Band

C-18 (osc.) C-10 (Det.) Rock Gang Gang C-3 (ant.)

7 15,200 kc 15,200 kc (167°)

"C" Band

C-17 (et.) Rock

(D Gang

C-1 (ant.)

8 9,500 kcC-12 9,500 kc (28.6°)

C-2 (ant.) (Det.)

Rock Gang

9 Repeat (7) and (8)

°Use minimum capacity peak if two peaks can be obtained. Note-Oscillator tracks 455 kc above signal on all bands.

LI3-BOTTOM Lt¢ -TOP 4S5 KC.

LIS -BOTTOM L16 -TOP 455 'KC.

Tt 1

LikPMONo. JACK

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180

I II 11 Illy

POLICE

SPECIAL 2.3

55 A STAr1DARD

C SHORT WAVE 9.3

1 l

2.5

AIRCRAFT 90M

3.0 3.5 l l l l 1 t l 1

AMATEUR 60M AIRCRAFT 49M

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1 l l l a l t I a a l 1 l 1 l 1 1 1 l 1 1 1 1 1 I

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0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180


RCA PAGE 13-29

MCOEL 28T, Chas .RC -569 RCA MFG. CO., INC.

Ric p Art O iu.4 ;44

n.LL Ni T- {OET M MfD1YM1 DM - e' Si{MOYIO M4{{cöl'

OFF LOUD SpaCCM

POWER-VOLU TUNING RAE NO CONTROLME TONE CONOTROL CONTROL CONTROL

I

DIAL POINTER ANTENNA-GROURO 0 0 0 0

TERMINAL BOARD g

1--i- ( 1 LINK PUSH SUTTON, TRIMMERS PU LLEV

CORD DRIVE

DRIVE CORK " DRUM

O 1 0 _-g)__®__©__¡ 1-J 0

SHOWN WITH GANG AT MAX. CAPACITY SPRING 2

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3 TURNS

Insist on genuine factory

`-J PNONO-TELEV.-F.M. POWER CHASSIS JACK CORO

Replacement Parts -tested parts, which are readily identified and may be purchased from authorized dealers.

STOCK No.

DESCRIPTION Unit List Price

STOCK No.


31025 33014

38368

38357 38363

35791

36424

38360

12814 14021 12948 13057 12720 34699 34700 13003 12694 38830 38831 30882 30303 33584

4937 36248 32787

4839 31581 38367Coil-Antenna 3603311 38358 38315 37638 38366 38364 38404 34662

35788 35871

38,859 38361 38365 31580

CHASSIS ASSEMBLIES (RC -569)

Board -"Antenna -Ground" board... Capacitor -Electrolytic, comprising 3 sections of

10 mfd., 450 volts, and 1 section of 20 mid., 25 volts

Adjustable trimmer (50-350 mmfd.) Cator coil for antenna

Capacitor -Mica trimmer -2-20 mmfd. Capacitor -Mica trimmer comprising 2 sections

of 8-80 mmfd. Capacitor -Mica trimmer comprising 3 sections

of mmfd. Capacitor -Mica trimmer comprising 1 section

of 10-160 mmfd., 2 sections of 25-250 mmfd., 2 sections of 50-400 mmfd., and 1 section of 100-540 mmfd... ..

Capacitor -Mica trimmer comprising 1 section of 50-350 mmfd., 1 section of 5-50 mmfd., and 2 sections of 2-20 mmfd

Capacitor -5.6 mmfd. Capacitor -22 mmfd. Capacitor -33 mmfd. Capacitor -68 mmfd. Capacitor -100 mmfd., moulded Capacitor -100 mmfd., unmoulded Capacitor -120 mmfd. Capacitor -180 mmfd. Capacitor -220 mmfd. Capacitor -226 mmfd. Capacitor -630 mmfd. Capacitor -2,200 mmfd. Capacitor -.0035 mfd. Capacitor -.005 mfd. Capacitor -.01 mid. Capacitor -.02 mfd. Capacitor -.05 mid. Capacitor -0.1 mfd. Cell -Bias cell

Coil -Loop primmarar y coìl Coil -Oscillator coil Coil -Push button oscillator coil -high frequency Coil -Push button oscillator coil -low frequency Coil-R.F. coil Condenser -3 -gang variable tuning condenser Control -Volume control and power switch Cord -Pointer cord (approx. 60 -in. overall

length) Core -Adjustable core and stud for oscillator coil Core -Adjustable core and stud for push button

oscillator coils Cup -Coil mounting cup and bushing Drum -Condenser drive drum Frame -Dial frame complete -less dial Holder -Bias cell holder

.25

1.90

.25

.25

.40 .50.20 1.10

,75 ,35 .35 .35 .35 ,35 .30 .30 ,35

.35

.45

.20

.40

.25

.25

.20 .30 .25

1.00 50 1.00 .30 .30

1.75 3.65 2.00

.25 .15

.55

.20

.50 1.75

.15

35798 38356

5040 31373 13220 34765 35885 30694, 14075 30436 35875 12266 30650

30648 30649 30992 35797 31364 35787 31251 31418 12007

38362 38384 38369 35636 35790 35588

35959

35969

38817 38373

5039 38374

38376 38375 37334 38378 38377 35814 11765 34317 33774 30900 34053

Indicator -Station selector indicator Loop -Antenna loop complete -less supports Plug -4 -contact female plug for speaker cable Pulley -Drive cord pulley Resistor -56 ohms, } watt Resistor -100 ohms, } watt Resistor -470 ohms, 2 watt Resistor -3,900 ohms, * watt Resistor -8,200 ohms, } watt Resistor -12,000 ohms, * watt Resistor -12,000 ohms, 3 watt Resistor -39,000 ohms, * watt Resistor -56,000 ohms, } watt Resistor-270,000 ohms, j watt Resistor -470,000 ohms, * watt Resistor -2.2 meg., * watt Resistor -10 meg., } watt Shaft -Tuning knob shaft Socket -Dial lamp socket Socket -Phono input socket Socket -Tube socket Spring -Pointer cord spring Spring -Retaining spring for oscillator coil core

and stud Switch -Range switch Switch -Selector switch Switch -Tone switch Transformer -First I.F. transformer Transformer-Secorrtd I.F. transformer Transformer -Power transformer -105-120 volts,

25 cycle Transformer -Power transformer -105-120 volts,

50-60 cycle --less shields Washer -"C" washer for tuning knob shaft

SPEAKER ASSEMBLIES (92196-3)

Coil -Field coil -1,060 ohms Cone -Cone complete with voice coil Plug -4 -prong male speaker plug Transformer -Output transformer

MISCELLANEOUS ASSEMBLIES

Bezel -Push button bezel Button -Push button Clip -Dial clip .

Decalcomania -Control panel decal-Pkg. 5 Dial -Glass dial scale Knob -Control knob Lamp -Dial lamp .

Marker -Station selector marker Mounting -Speaker mounting hardware Spring -Retaining spring for control knobs Spring -Retaining spring for push button

.20 2.60

.30

.08

.20

.20

.25 .20 .20 .20 .35 .20 .20 .20

.20

.20

.30 .20 .15 .25 .05

.02 2.85 2.90 1.00 1.70 1.60

6.30

3.75 .02

2.10 1.75

.30 1.65

.75

.20

.15

.02 1.40

.25

.15

.35

.30

.05

.02

ALL PRICES ARE SUBJECT TO CHANGE OR WITHDRAWAL WITHOUT NOTICE.


30 RCA MODEL 341, Ch.RC-1001E

C25

T10 °

RCA MFG. CO., INC.

CONVERSION GAIN 4X

CONVERSION

1

Ix I 100X- f 0.6X (600KC I (000-455 KC.) (4.55 KC.) (455 KC) (455 KC.)


1 CI .035 I

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APPRQX GAIN 1OXDATA USING ) RCA RIDER

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105 ,02

CIS r - 500 I

I- I' R4

2tctao0

RS 470,000

C

3V BIAS FOR I + GAIN DATA

CHAS SIS GROUND

1 COMMON WIRING INSULATED FROM CHASSIS

VOLTAGES SHOULD HOLD WITHIN *20; WITH I17 V. AC SUPPLY

Mt MEASURED WITH IS CHANALYST OR VOLTONMYST

FREQUENCY RANGE

Broadcast Band Short Wave Band 8.9 mc to 12 mc.


117V Ac DC

535-1,720 kc


side of test- oscillator to-

Tune test-osc. to-

Turn radio dial to-

Adjust the fol - lowing for max. peak output-

1 12SK7 grid

in series with 0.1 mid.


C10, CO 2nd I -F

Transformer

2 12SA7 grid


C8, C7 1st I -F

Transformer

3 Antenna term. in series with

47 mmf. 10 mc 10 me C21 (osc.)

C23 (ant.)


200 mmfd. 1,800 kc 1,600 kc C14 (osc.)

5 RaLoop diation

1,300 kc Resonance on Signal C15 (ant.)

6 Radiation LoopRock 600 kc 600 kcC22 Osc.

in

It is recommended that this step be repeated using a received station of known frequency.

Use minimum capacity if two peaks ctt-sec. CTS-OSe. ,e rc. eso nc.

", AnT cW

can be obtained.

35ë5GT RECT.

S

J575GT"--

C IF 30

MFD

FIELD

LI? ` 50 MFD.

3

ºx3015-4 IRC Io01e)

PILOT LAMP Mazda No. 51, 6.8 volts, 0.2 amp. POWER OUTPUT Undistorted .9 watts Maximum 1.3 watts LOUDSPEAKER

Type 5 -inch electro dynamic V.C. Impedance 4.0 ohms at 400 cycles POWER SUPPLY RATING 105.125 volts, AC 50 or 60 cycles, or TIC 25 watts

5 60 10 80 100 120 150 F.

3f77 10.5 11.5 25m I

mminzummormimmipanimmizorm The dial scale drawing shown is a full size

reproduction. It can be used as a direct substitute for regular dial scale in

alignment procedure.

VG

Jn

i


RCA PAGE 13-3I

MODEL 28X, Chas.RC-1002

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32 RCA

MODEL 28X,Ch.RC-1002 RCA MFG. CO., INC.

FREQUENCY RANGES Standard Broadcast 595-1,720 kc

Short Wave 8.7-15.6 me

Intermediate Frequency 455 kc

Thermal relay cuts in the dial lamps after the set warms up.- This set incorporates a thermal relay to control the dial lamps. When

the set is "off," the relay contacts are closed. This shorts out the

two lamps. When the set is turned "on," the heater current flows

through the relay element R24. This heats up and causes the relay

contacts to open, permitting the heater current to flow through the

two dial lamps and light them. In normal operation, the lamps. light

about a half -minute after the set is turned on.

PULLEY --(-71

DRIVE CORD

SHOWN WITH GANG AT MAX. CAPACITY

Alignment Output Meter Alignment.-Connect the meter across the voice coil,

and turn the receiver volume control to maximum.

Test-Oscillator.-Connect the low side of the test -oscillator to the receiver chassis, through a .01 mid. capacitor, and keep the output as low as possible.

Antenna.-The set is equipped with a built-in loop antenna. If an outdoor antenna is used, it may be connected to the `ANT" terminal on rear of cabinet. It should not be longer than 100 feet, including lead-in. If it is longer, connect a 100 to 200 mmf. capacitor in series with the lead-in.

Power -Supply Polarity.-For operation on d -c, the power plug must be inserted in the outlet for correct polarity. if the set does not function, reverse the plug. On a -c, reversal of the plug may re-

duce hum.

Phono Attachment.-A jack is provided on the rear of cabinet for connecting a Phono Attachment into the audio -amplifying circuit. The cable from the Phono Attachment should be terminated in a Stock No. 31048 plug to fit the jack.

Dial Pointer Adjustment.-The dial pointer should be set at the left hand end dial marks, with the gang in full mesh.

L 12 -ANT. 9.5 MC. -_

( BOT TOM)

I. 14 C-OSC 11.5 MC. rl

C51 c-osc 15 MC.

4® C>-0

C2

C27

\C2! 1O ® ÌS

MC

6567

a C 52 A -05C 1500 KC. / / C 33

el19 C26 WAVE TRAP 455 KC.

T. 1ST I.r TRANS

Kcs ac.ss

2 No. I.F TRANS

es x

C36 -C37 455 Sc

LOUDSPEAKER 92136-2 or 92136-8 Type PM EM Size 9k -inch 91 -inch

"Ellipticon" "Ellipticon" Voice Coil Impedance at 400 cycles 4 ohms 9 ohms

POWER OUTPUT RATING

Undistorted 2.5 watt Maximum 4.0 watt

POWER SUPPLY RATING 105-125 A.C. 50-60 cy. or D.C. 45 watts

Height Cabinet Dimensions (inches)

101 Chassis Base Dimensions (inches) Overall Chassis Height

Width Depth 15 .... 9Ii

12} .... 6 9¡

tex111811Prir PHONO JACK i/®

3

Procedure

C90 -ANT 1300 KC

TO L12

To 53

TO S2 TO C9 TO L11


side of test osc. to-

Tune test osc. to-

Range Switch to-

Turn radio dial to-

Adjust the follow - ing for max. peak

output

1 I -F grid

in series with .01 rnfd.

kc A

Quiet Point near

C36, C37 2nd I.F. Trans.

455 middle of dial C34, C35

1st I.F. Trans. 2 Det. grid


3 Ant, lead in series with

15 me C 15 me C-31 (osc.)* C-29 (ant.)

9.5 me C 9.5 me L14 (osc.) L12. (ant.) 50 mmfd.

Repeat steps 3 and 4.

5 Antenna terminal

1,300 kc A 1,300 kc C-32 (oec.) C-30 (ant.)

600 kc A 600 kc C-33 Rock in 6 in series with 200 mmfd

Repeat steps 5 and 6. 7

8 R -F grid


455 kc A low en o{ Bind

C-2655

*Oscillator should track on high frequency side of signal.

If two peaks are obtained use high frequency (minimum capacity peak).

**Feed a high signal level of 455 kc into R.F. grid and adjust C-26 for minimum signal.

Critical Lead Dress 1. Dress all AC filament and power wiring down close to chassis and

as far as possible from all audio grid or plate wiring. 2. Dress all leads or parts as far as possible away from oscillator coil. 3. Dress audio coupling capacitor C38 from volume control to grid

of 6SQ7 away from filament wire connecting No. 8 pin socket 5

and No. 8 pin socket 7. 4. Dress lead from trimmer condenser on loop to S.W. ant, coil

between rectifier and R.F. tube and away from other coil leads. Dress IF plate and grid leads' back into shield can to keep exposed length as short as possible.

(c)John F. Rider www.americanradiohistory.com

RCA PAGE 13-3j

RCA MFG. CO., INC. MODEL 28X5,Ch.RC-1002A

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2 roe'

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34 RCA

MODEL 28%5,Ch.RC-1002A RCA MFG CO., INC.

LOUDSPEAKER Type Elliptical 9x6 inches Perm. Mag. V.C. Impedance 4 ohms at 400 cycles

POWER OUTPUT RATING Undistorted 2.5 watt

4.0 watt Maximum

POWER SUPPLY RATING 105-125 A.C. 50-60 cy. or D.C. 45 watts

Thermal relay cuts in the dial lamps after the set warms up.- This set incorporates a thermal relay to control the dial lamps. When the set is "off," the relay contacts are closed. This shorts out the two lamps. When the set is turned "on," the heater current flows through the relay element R24. This heats up and causes the relay contacts to open, permitting the heater current to flow through the two dial lamps and light them. In normal operation, the lamps light about a

half -minute after the set is turned on.

950 750 750 610 54.0 T0 TO To TO TO.

1560-1420-14-20- 1250 1100 KC KC KC KC KC

7.e g e OSCILLATOR ADJUSTMENTS

e zgxS

Push Button

The station push buttons connect to separate magnet -te -core oscillator coils and separate antenna trimmers which must be adjusted for the desired stations. Use an insulated screwdriver or a ignment tool "such as RCA Stock No. 31031. Allow at least five minutes warm-up period before making adjustments.

In the event that the receiver is to be used with an external an-

tenna use one or two feet of wire (as an antenna) to ensure sharp p,raking during the final adjustment procedure. 1. Make a list of the desired stations, arranged in order from low

to high frequencies.

Alignment Output Meter Alignment.-Connect the meter across the voice coil,

and turn the receiver volume control to maximum.

Test-Oscillator.-Connect the low side of the test -oscillator to the receiver chassis, through a .01 mfd., capacitor, and keep the output as low as possible.

Antenna.-The set is equipped with a built-in loop antenna. If an outdoor antenna is used, it may be connected to the "ANT" terminal on rear of cabinet. It should not be lor.ger than 100 feet, including lead-in. 1f it is longer, connect a 100 to 200 mmf. capacitor in series with the lead-in.

Power -Supply Polarity.-For operation on d -c, the power plug must he inserted in the outlet for correct polarity. If the set does not function, reverse the plug. On a -c, reversal of the plug may reduce hum.

Phono Attachment.-A jack is provided on the rear of cabinet for connecting a Phono Attachment into the audio -amplifying circuit. The cable from the Phono Attachment should be terminated in a Stock No. 31048 plug to fit the jack.

Dial Pointer Adjustment.-The dial pointer should be set at the left-hand end dial marks, with the gang in full mesh.

L12 -ANT !.5 MC. -. .BOTTOM)

l 14 C-OSC 5.5 Mc.

C 31 C. 03C 13 MC.

41©

\C2, C . ANT. 15 MC

CD

C25

C27

C 52 A oSC 1300 KC. /

C35 A oSC

-600 KC. i 1 ¡v,cJy

C 26 WA./E TRAP

' 455 KC

IST. IF TRANS

LP /

2ND. I.F TRANS.

e, ea C34 -C35 c3a-C37 43e KC. -s5 KC.

es

DRIVE CORD --"-


PULLEN

Adjustment 2. Turn the range selector to "A" band, and manually tune in the

first station on the list.

3. After turning range selector to "PB" position, push in station button No. 1 (extreme left). Then adjust the No. 1 oscillator core to receive the station. It may be necessary to maintain ap- proximate tracking between antenna and oscillator to receive weak stations.

4. After oscillator core is adjusted properly, adjust antenna trimmer No. 1 for maximum output.

Clockwise adjustment of cores and trimmers tunes the circuit. to lower frequencies.

5. Adjust for each of the five remaining stations in the same manner.

6. Make a final careful adjustment of the oscillator cores and antenna trimmers.

On push-button No. 5, the higher frequency stations may be obtained with the oscillator core No. 5 either in or out. (Oscillator frequency either 455 kc below or above the signal.) The out position should be used so the oscillator is 455 kc above the signal.

Procedure


side of test osc. to-

Tune test. oec. to-

Range Switch to-

Turn radio dial to-


output

1

I -F grid in series with

.01 mfd. 455 kc A

Quiet Point near

middle of dial


2 Det. grid


C34, C35 1st I -F trans.

3

Ant. lead in series with

m 50 mfd.

15 me C 15 me C31 (osc.) C-29 (ant.)

4 9 5 me C 9.b me L-14 (we.) L-12 (ant.)

Repeat steps 3 and 4.

5 Antenna terminal

in series with 200 mmfd.

1,300 kc A 1,300 kc C-32 (an .) C-30 (ant.)

6 600 kc A 600 kc C-33 Rock in


8 R -F grid

in series with 455 kc A d low of dial C-28

.61 mfd.

"Oscillator *Oscillator should track on high frequency side of signal. If two peaks are obtained use high frequency (minimum

peak). *Feed a high signal level of 455

for minimum signal.

capacity

kc into R.F. grid and adjust C26

Critical Lead Dress 1. Dress all AC filament and power wiring down close to chassis and

as far as possible from all audio grid or plate wiring. 2. Dress all leads or parts as far as possible away from oscillator cod. 3. Dress audio coupling capacitor C38 from volume control to grid

of 6SQ7 away from filament wire connecting No. 8 pin socket 5 and No. 8 pin socket 7.

4. Dress lead from trimmer condenser on loop to S.W. ant. coil between rectifier and R.F. tube and away from other coil leads.

5. Dress I -F plate and grid leads hack into the shield can to keep exposed length as short as possible.

©John F. Rider


RCA PAGE 13-35

MC®EL 29K,Ch.RC-570; RCA MFG. CO., INC. 29K2,Ch.RC-570C

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36 RCA MODELS 29K,Ch.RC-570; 29X2,C11.RC-570C

RCA MFG. CO., INC.

POWER SUPPLY RATINGS Rating A 105-125 volts, 50-60 cycles, 100 watts Rating B 105-125 volts, 25-60 cycles, 100 watts

Calibration Scale on Indicator -Drive -Cord Drum-The tuning dial is fastened in the cabinet and cannot be used for reference during alignment, therefore a calibration scale is attached to the indicator - drive -cord drum which is mounted on the shaft of the gang condenser. The setting of the gang condenser is read on this scale, which is calibrated in degrees. The correct setting of the gang in degrees, for each alignment frequency, is given in the alignment table.

As the first step in R.F. alignment, check the position of the drum. The 135° mark on the drum scale must be vertical, and directly over the center of the gang -condenser shaft when the plates are in minimum capacity position. The drum is held to the shaft by means of plastic cement which must be securely fastened when the drum is in the correct position.

To determine the corresponding frequency for any setting of the calibration scales, refer to the accompanying drawing which shows the dial with 0-180° calibration scales drawn at top and bottom.

Pointer for Calibration Scale.-Improvise a pointer for the calibration scale by fastening a piece of wire to the gang -condenser frame, and bend the wire so that it points to the "0" mark on the calibration scale when the plates are fully meshed.

Dial -Indicator Adjustment. - After fastening the chassis in the cabinet, attach the dial indicator to the drive cable with indicator at the 540 kc mark, and gang condenser fully meshed. The indicator has a spring clip for attachment to the cable,

C36

RECT.

L15 -BOTTOM LIG- TOP

/455 K[.

651(7 () L17. BOTTOM LIe - TOP 455 KC

C37

T2

SRoww

C30 C31

Model 491(2 Speaker Connections

r)TrIFPWISE SAME AS 29K EUCEPT C 25 - 470 MME C?. -.015 MED.

C 33 - . nl MFr '0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 160

HIGI FREo SPeAKER External Antenna,-When using an External Antenna, Peak C3 JIll1LLLLl

for max. output on a station in the 31 -meter band,

LOUDSPEAKERS (RL 703-1) Models. 29K and 29K2 Type 12 -inch electrodynamic V.C. Impedance - 2.2 ohms at 400 cycles

(RL 81B-6) 291(2

.. 5 -inch Perm. Magnet

.. 3 ohms at 400 cycles

Steps

Connect the high aide of

test-osc. to-

Tune test-osc. to-

Range Switch

Turn radio dial to- following

the for

max. peak output

6SK7 I -F grid in

series with .01 mfd

455 kc "A" Point near 160°

L17 and L18 (2nd(2nd I -F Trans.) -

2

6SA7 Det. grid in

series with .01 mfd.

L-15 and L-16 (1st I -F Trans.)

S Ant. section of Gang

Condenser

1,500 kc "A"

160° C-.12 (cac.)

4 600 kc 90.5° L-7 (osc.)

5

Ant. terminal "A"C-4

in series with 47 mmf.

link open(Rock 6,100 kc "B" 181° C-11 (osc.)

C-5 (ant.)

6 1b,200 kc "C"

167° C-10 (osc.) (ant.)

7 9,600 kc 32° C-3 (ant.) Gang)


9 Fasten chassis in cabinet, see that link is closed on antenna terminal board, indicator at left end of dial scales with gang at maximum capacity.

10 A radiation

loop consisting of two turns of

18 inches in diameter located 4 to 6 feet from

receiver

1,500 kc

"A"

I,500 kc signal

C-1 (ant.) on loop

11 600 kc 600 kc L-7 (am.) (Rock Gang)


'Use minimum capacity peak if two peaks can be obtained.

LOW FRED SPEAKER

HEAD PHONES 2000 OR 300D 1L

TO AUDIO CHANNEL OF CHANALTST OR AUDIO AMPLIFIER

"Phase Checker," using Headphones.

M)IKF

Note: Oscillator tracks above signal on all bands.

IEr1.il WM AMATte. MIM AMO.R 41M

2.3 2.5 3.0 3.5 4.0 5.0 6.0 727

55 60 70 80 100 120 140 160 11 MUDS )S MODS AMATEUR IT METERS

9.3éë:- = 2:10 II g:12:;:;: 13 14 15:;:

0 10 20 30 40 50 60

. , - 70 80 90

Phasing Speakers in 291(2 For correct tone, it is ESSENTIAL that the two speakers operate

"in phase." so that the two cones move In and out together. It is necessary to check the phasing whenever a new speaker, cone,

field coil, or output transformer is installed, or whenever the speaker connections are altered in any way.

The recommended procedure is as follows: 1. Hook up a "phase checker," using headphones or PM speaker

units as shown. Connect the checker to an audio amplifier that has an output meter. (The audio channel in the Chanalyst is excellent for this purpose.)

2. Feed a 400 -cycle modulated signal into the receiver. Turn volume up to medium. Hold both units of the checker in front of the large speaker in -set- Throw the toggle switch to each position and note which position gives maximum output on meter. Mark this position of the switch "in phase." Mark the other position "out of phase."

3. Place one unit of the phase checker in front of each speaker in the set. Throw the toggle switch to each position and leave it at the position that gives greatest output on the meter. Note the switch marking for this position. If it says "in phase," the set speakers are correctly phased. If it says "out of phase," reverse the leads to the voice -coil terminals of the small speaker in the receiver.

100 110 120 L30 140 ISO 160 170

2- BPI() SPEAKERS 3TK' 37807

D.P. D. T. TOGGLE SAN.

BP -10 OUTPUT TRANSFORMER 5TK_ 3780G

TO INPUT OF AN AUDIO AMPLIFIER ,

OR TO AUDIO CHANNEL OFCHANALYST, OR TD 200 MICROAMP. A.C. METER

"Phase Checker," suing small PM speakers.

180

©John F. Rider


RCA PAGE 13-37

MODEL 351, Ch.RC-1001C

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38 RCA MODEL 36%,Ch .RC -462A

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©John F. Rider


RCA PAGE 13-39

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40 RCA

MODEL B-52,Ch.RC-1004D

BATTERY DRAIN

RCA MFG. CO., INC. 3 amperes

10 m.a. (Switch at "Battery Saver" position)

14 m.a. (Switch at "Maximum Output" position)

POWER CONSUMPTION 22.5 watts

With CV -42 Conversion Unit

LOUDSPEAKER (5 -inch PM) RL -85-6 92322-1

Voice coil impedance at 400 cycles 3 ohms 3 ohms


DO NOT TURN THE "BATTERY -ELECTRIC" SWITCH TO ELECTRIC POSITION WHILE THE RECEIVER IS

CONNECTED TO BATTERIES.

Step Connect high side of test osc. to-

Tuns test ose. to-

Turn radio dial to-


peak output

1 I -F grid


455 kc Quiet point




.01 mid.

C12, C13 (1st I -F Trans.)

S


200 mmfd.

kc

Tuning er co1,720

rotoro plates all out

C17 (osc,)

1,300 kc 1,300 kc

signal C9 (ant.)

5 455 kc Quiet point


Adjust C22 for minimum output

on strong 455 kc signal

9.2 V. APPROX-. MAX. AVC.

-1 1.5 V. FIXED BIAS FOR /' GAIN DATA

Precautionary Lead Dress. - 1. The lead from the 3Q5 plate to output transformer should be

dressed under clip and away from audio input leads.

2. All filament wires should he dressed close to chassis.

3. Keep AVC lead connecting C1 to antenna coil away from the

1A7GT plate. 4. Keep blue plate leads coming from I.F. transformers short and

close to chassis. 5. Keep yellow leads connecting to oscillator coil away from trap coil.

6. Keep grid lead of 1N5GT RF tube away from 1A7GT grid.

POWER SUPPLY 1 "A" - "B" 1U-90 volt pack.

Model B-52 can be operated on 105125 volts AC, 50-60 cycles,

or 105-125 volts DC, by means of CV -42 Conversion Unit.

C22 DET. C IT- o3C. 455 KC. 1720 RC.

L-_/

1

ANT. TO GRID CON V. GAIN 5X 1 X 24 X I .4X --- 150 X

(600 KC) (600 KC) (600- 455 KC) (455 KC) ( 455 KC) MEASURED WITH 1.5 VOLT FIXED BIAS

BOTTOM VIEW OF runt 2_

SOCKETS

L2 a6 s

5.25

SI -

ON VOL. CONTROL

0-642.2

I NSGT R.F

NIELO

-t-

7V

.tA 40

es.l® © ce

R12 5600 LII 200.

C22 IO -7o

1,4 -9v. (600 1LC )

-13V.(1500 KC)

CIT 2-20

C IB 10 5s' WMRE MCD.

1A7GT 1sT OCT Q 05C.

R/3 3.3 MEi

52

M UAW

RED BATTERY

CABLE PLUG (PRONG VIEW)

y

/WV.

TRAN3. I M r=

OWI, C1 5-520,

RS L GB M .AAv-

mc .0C2

U

IS

L(. 20. 120.

FRED

14

SS FRONT

3+L

1, C2: 10

IN5GT I. F.

CS -ANT. 1500 KC. C12 -C19

455 KC.

/, IbT I.F TRANS.

C 14-C IS 455 KC.

`T2RAND.I.F

.OX (455 KC)

POWER SUPPLY 105-125 v.

00-1W, OE OC.

(400..)

11150T 2MD DET.-AF. a AVC.

T1 I

J

40 X -

22 X APPROX. GAIN (4o0 ,v) LATA MEASURED

WOK RCA RIDER CHANALYST

3Q 513T OUTPUT

54 REAR

f LIFO. RI -I 22

R14 R 10

sB0 SSO

Y1 C20

L 25 MFD.

i.4 V BATTERY SAVER Peen -tow -5.2 V. MAX. OUTPUT POSITION

POWER SW. VIEWED FRON FRONT SHOWN IN POSITION NO 1

POSITION 1_ BATTERY SAVER POSITION 2- MA%.OUTPUT- BATTERY POSITION 3- AC -DC OPERATION

VOLTAGES SHOULD HOLD WITHIN 420% WITH RATED SUPPLY VOLTAGE

* MEASURED WITH CNANALYST OR VOLTONMYST.

P-523022-3

eJohn F. Rider www.americanradiohistory.com

RCA PAGE 13-41

Ii 0 0

ANT. TO GRID 50 X

( GOO KC )

RCA MFG. CO., INC.

15 )( O.BX 200X Ix (600-455KC.) (455KC.) (455KC.) (455 KC.)

BOTTOM VIEW OF Tune SOCKETS.

MEASURED WITH -3V. FIXED BIAS ON AVC. BUS

12 5A7 ILT DET 6. OSC.

GIS

GI

LOOP

1ce

RI 22,000

R16 220,000

so v.

©rr,-,.,,© iT777 o.1

1]O 8o v. 80 v.

A ` to f`C>7

O/C. COIL Ce

b lUl 7-

-13 v APPROX /MAX. AVC. VOLTAGE

VOLTAGES SHOULD HOLD

® WITHIN ±20% WITH 117 V. AC SUPPLY )k MEASURED WITH

CHANALYST OR VOLTOHMY5T -1- GAIN DATA.

ILrI.F. TRANS. 455 K C. t0a I n

1 C650#o _, C7 75 1

ó 1 75-160 7A .7A

-1 s<AtK

R4 3.3 MEG

r

40X

MODEL 55X,Ch.RC-1003C

4.00 4v

125Q7 2ar CET. A.F Sc AVC.

0 17A

RS VOL.CONTQ 500,000 STOP AT 47,000

75- leo

CII BLK

- - 7 1201E

YEL. CIS -120 zJ m

C14 .02 4.7

HE6.

R/

I

APPROX. GAIN 14 X --+L DATA USING

400ív I RCA. RIDER CHANALYST.

50 Lb GT OUTPUT

4V.

R7 220,000

© -.71` © 225A.

4Bo v. EYE

CHASSIS GROUND

TO ANT. LEAD

3V. BIAS FOR

COMMON WIRING INSULATED FROM CHASSIS

Ac.

12 SK 7 I. F.

"RUN

35E5GT RECT.

110 V

CI8 .05

O

K

BLACK-. FREQUENCY RANGE 540-1,720 kc

t17 v. Intermediate Frequency. 455 k .

III

0n DIAL t) LNIP

1G 17 +.OY

RIS 1200



Tune test-osc. to-

Turn radio dial to-


output

1

I -F grid, in series with

.01 mfd. 455 kc

Quiet point 1,600 kc

end of dial

C8, C9 2nd I -F

Transformer


.01 mfd.

C8, C7 1st I -F

Transformer


100 mmfd. 1,720 kc Gang at

minimum CS (osc.)

4 Radiated signal 1300 kc Signal

Frequency Cl (ant.)


Phasing Speakers in Model 55X.- For correct sound quality, it is ESSENTIAL that the cones

of the two loudspeakers move in and out together. To check the phasing, connect a 111 -volt dry cell across the

secondary of the output transformer and observe, by sight or feel, whether the two cones move in the same direction. If one moves in while the other moves out, reverse the external connections to the voice coil of the permanent -magnet speaker.

3SZ5 GT RECT.

50LGGT OUTPUT

C18

R7

E.M.S. FIELD

C 20

C17

12A

WG

/777

2 -Pm SPEAKERS

vC

SPEAKER FRAME

R 925019-7 55x (Rc IooSC)

E. M. SPEAKER

N.C.

P. M. SPEAKER

3RPEAAM EaR

55 X

Above-Circuit of Model 55X Using one "PM" and one "EM" Speaker.

POWER SUPPLY RATINGS 105-125 volts, direct current, or 50-60 cycles 30 watts POWER OUTPUT (125 volts, 60 cycle supply) Undistorted 0.8 watts Maximum 1.2 watts

LOUDSPEAKERS RL -86-A3 5 -inch "EM," 4 -ohm voice coil RI.81-B2 .5 -inch "PM," 4 -ohm voice coil

Test-Oscillator.-For 1-F alignment, connect the low side of the test -oscillator to the common negative through a .01 mfd. capacitor, and keep the output as low as possible.

Pre -Setting Dial.-With gang condenser in full mesh, the pointer should be adjusted so that it is vertical.

Power -Supply Polarity.-For operation on d -c, the power plug must be inserted in the outlet for correct polarity. If the set does not function, reverse the plug. On a -c, reversal of the plug may -

reduce hum.


42 RCA

MODEL R-56 Phono RCA MFG. CO., INC.

POWER OUTPUT RATING

Undistorted 2.25 watts Maximum 4.50 watts

LOUDSPEAKER

RL -86-C1 5 -inch Electrodynamic V. C. Impedance at 400 cycles 4 ohms

PHONOGRAPH

Motor Self-starting Induction Drive Rim Drive, 78.25 R.P.M. Pickup Crystal

POWER SUPPLY

105-125 volts, 60 cycles 50 watts

PHONO JACK

50L6GT A.F

R1 9V. VOL. CONTROL OBI 1 MEG.. 11R2

50

e PICKUP

MC TOR 40 n

R3 820 M

RI 51

'^,A VIE VJ

MOTOR TURNTABLE OIL BOARD \

11 .A311 arm, IIIIWILI

1 TURNTABLE BEARING OIL

IDLER SPRING

C3 -.02

135V. 62 MA.

ON Ilell

À an -rte

R56

ï J

TI

145V- 5 MA.

R4 FIELD

68M iL RED 106OtL C5 16

220 V. 50Y6GT MFD, r BLK

w 68 MA.

REC T al1 GRì1 .74R5 I C -Ç02 MFD. MFD..

Y "J D

SOLGGT SOY6GT 125' .05C4

H.G.

° SI ON VOL. CONTR POwER

U U SUPPLY,

BOTTOM VIEW CF TUBE SOCKETS

IDLER __ MOTOR

SPINDLE

OIL PAD

OIL PAC

n

I

I

3.6 st ` EM.SPkR

COMMON WIRING CHASSIS INSULATED FROM GROL.N CHASSIS

M-95218-1 R56(RSI19)

STOCK No.


STOCK DESCRIPTION Unit

PList rice

AMPLIFIER ASSEMBLY 39688 Coil -Field coil 2.10

39684 Capacitor -Electrolytic, one section of 10 mfd., 39689 Coil -Neutralizing coil .25 250 volts, and one section of 16 mfd., 150 volts 1.10 39539 Cone -Cone, voice coil, center suspension, and

36248 Capacitor -.02 mfd., 700 volts .20 dust cap 1.20

32787 Capacitor -.05 mfd., 400 volts .20 43763 Capacitor -0.1 mfd., 400 volts .30 MOTOR ASSEMBLY 39500 Capacitor -16 mfd., 150 volts .50 38410 Control -Volume control and power switch 1.50 36402 Arm -Idler arm and stud for motor .25 11565 Resistor -16 ohms, } watt .20 20134 Ball -Steel ball for turntable bearing .06 39685 Resistor -120 ohnT, 3.1 watt .45 36404 Motor -105-125 volts, 60 cycle motor 4.75 30785 Resistor -150 ohms, 1 watt .22 36403 Mounting -One set of mctor mounting grommets, 14138 Resistor -68,000 ohms, } watt .20 spacers, and washers .10 30161 Resistor -820,000 ohms, } watt .20 36406 Plate -Idler arm guide plate for motor .10 33742 Socket -Phono input socket .20 36401 Plate -Motor plate complete with bearing and 31251 Socket -Tube socket .25 ball .50 39683 Transformer -Output transformer 1.35 30340 Retainer -Motor fan retainer .02

30585 Spring -Motor idler arm tension spring .06 PICKUP AND ARM ASSEMBLY 36399 Turntable -Turntable and bushing complete with

33591

34482 34768

Arm -Pickup arm only -less cartridge, and pivot shaft and base assembly

Base -Pickup arm base -less pivot shaft Bushing -One rubber and one metal bushing for

.50

.30 33726 36405 36274

spindle Washer -"C" washer for motor idler wheel Washer -Flat washer for motor idler wheel Wheel -Motor idler wheel and bearing

1.50 .02 .01 .55

pickup arm .15 39686 Crystal -Pickup crystal cartridge 4.25 MISCELLANEOUS ASSEMBLIES 34311 Ring -Retaining ring for pivot shaft .05 33974 Screw -Needle screw .10 38990 Foot -Cabinet foot .20 34481 Shaft -Pickup arm pivot shaft .70 38710 Knob -Volume control knob .15

SPEAKER ASSEMBLY 33530 Mounting -Rubber grommet, washers, and nut

for mounting pickup arm .10 (RL -86C-1) 39690 Screw -Finish screw and washer for mounting

32907 Cap -Cone center dust cap .02 amplifier (1 set) .05



RCA PAGE 13-43

RCA MFG. CO., INCMODELS TRK-90,Chassis KC -4H, KK-7H;TREr120,Chassis KC -4F, KK -7F

General Description The TRK-120 consists of a console -type, high -picture -

definition, mirror -viewing, five channel, Television Receiver and an eleven -tube, three -band broadcast radio receiver en- closed in a handsomely styled modern cabinet. Features of the Television receiver include: Twelve -inch Kinescope; Styrol (humidity -resisting) r -f and i -f transformer forms; black and white pictures; single station selector switch; tem- perature compensated condensers; iron core i -f and r -f tuning; double safety switch protection; safety -glass viewing

shield; extra large viewing mirror for wide angle viewing; automatic brightness control; and automatic volume control.

The TRK-90 is a direct viewing, high -picture -definition console -type, five channel, Television Receiver and an eleven tube, three -band broadcast radio receiver in a deluxe upright modern cabinet. Television features of this receiver are the same as for the TRK-120, except that a nine -inch Kinescope is used.

General Specifications Model TRK-90

Height 471/2 in.; Depth 24%6 in. Width. 311/2 in.; Weight. 200 lb.

Shipping Weight 283 lb.

Model TRK-120 Height 405/8 in.; Depth 197/8 in. Width. 345/8 in.; Weight. 198 lb.

Shipping Weight 275 lb. Power Supply Rating 105-125 volts, 60 cycles, 420 watts (Total) Fuse Rating-T5 and T7 (T7 and T8 in 50 cycle model) 3 amperes Fuse Rating-T6 (T9 in 50 cycle model) 3/4 ampere

Mechanical Specifications Video Chassis Base Dimensions 17 in. x 16 in SPU Chassis Base Dimensions 15 in. -x 131/4 in.

Electrical Specifications RCA TUBE COMPLEMENT

In KC -4F (TRK-120), and KC -4H (TRK-90) Video Chassis (1) RCA -6ÁC7 (5) RCA -6ÁB7 (9) RCA-6SQ7 (13) RCA -6ÁB7 (2) RCA -6J5 (6) RCA-6AB7 (10) RCA -6ÁC7 (14) RCA -6H6 (3) RCA-6AB7 (7) RCA-6AC7 (11) Kinescope* (15) RCA -6N7 (4) RCA-6AB7 (8) RCA -6H6 (12) RCA-6SK7 (16) RCA -6Y6 -G

In.KK-7F (TRK-120), and KK -7H (TRK-90) Socket Power Units

(23) RCA -5U4 -G Low Voltage Rectifier (24) RCA -2V3 -G

TELEVISION CHANNELS (Selector Switch Positions) 1 44 to 50 mc. 3 66 to 72 mc. 2 50 to 56 mc. 4 78 to 84 mc.

5 84 to 90 mc. Over-all Video Band Width 4 mc. Scanning Interlaced, 441 Line Horizontal (Line) Scanning Frequency (Sawtooth Wave) 13,230 cps Vertical (Field) Scanning Frequency (Sawtooth Wave) 60 cps Frame Frequency (Picture Repetition Rate) 30 cps

PICTURE SIZE (Approx. Mask Dimensions)

Max. Height 81/2 in. Max. Height 10 in.

TRK-90 51/2 x 71/4 in.

(17) RCA -6N7 (18) RCA -6N7 (19) RCA -6L6 (20) RCA -5V4 -G

(21) RCA -6N7 (22) RCA -6J5 `RCA -1803-P4 (TRK-120) *RCA -1804-P4 (TRK-90)

High Voltage Rectifier

TRK-120 73/8 x 93/4 in.

Precautions in Handling Kinescopes The Kinescope bulb encloses a high vacuum and, due to

its large surface area, is subjected to considerable air pressure. For these reasons, Kinescopes must be handled with more care than ordinary receiving tubes.

The large end of the Kinescope bulb - particularly that part at the rim of the viewing surface-must not be struck, scratched or subjected to more than moderate pressure at any time If the tube sticks, or fails to slip into its socket or deflecting yoke smoothly, investigate and remove the cause of trouble. Do not force the tube.

All RCA Kinescopes are shipped in special cartons and should always be left in the cartons until ready for installation in the receiver. Keep the carton for future use.

The RCA -1803-P4 (12 -inch) Kinescope is equipped with a protective lid and shield. Do not at any time remove the close -fitting cone -shaped section of the protective shield from the Kinescope. This section should be installed with the tube in the cabinet and is designed to protect the user while handling the glass bulb.

CAUTION: Do not open the shipping carton, install, remove, or handle the Kinescope in any manner, unless shatter- proof goggles and heavy gloves ape worn. People not so equipped should be kept away while handling Kinescopes. Keep Kinescope away from the body while handling.


44. RCA MODELS TEE- 90,TRK-120 RCA MFG. CO.. INC.


RCA PAGE 13-45

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RCA PAGE 13-47

RCA MFG. CO.,INC. MODELS TRK- 90, TRK-120

DEFLECTION YOKE CABLE

RADIO CHASSI (RC -427

ANT. LEA TO RAD CHASSI

GND. LE TO RADI CHASSI

TELE VIS SOUND CABLE

KINESCa CATHODI LEAD (YELLOV

TEL EVIS RECEIVE CHASSI; (KC- 4H

TELE VI5I I NTERLC SWITCH (52)

VBLOCK KINESCOPE 2ND ANODE MOUNTING SOCKET LEAD SCREW (X It) HI -VOLTAGE

YOKE 17 DEFL. V ,BLOCK /. MOUNTING YOKE I KINESCOPE BLOCK( LEADS

D 0, 5

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SPEAKER - M(X12) \ /2 F(((2Ì2)

` 5i

f/ 1

RADIO POWER SUPPLY UNIT

( RS- 83- E)

PILOT LAMP

/ H, G2 8 1ANODE NO.1)

RADIO POWER SUPPLY CABLE

-AC. CABLE TO

INTERLOCKS. e_g

DEFLECTION ANY LEAD GND. LEAD YOKE Tb RADIO TO RADIO CABLE CHASSIS CHASSIS

(YE LOW) (BLACK)

2ND. ANODE LEAD HI- VOLTAGE

(TEL. RECEIVER CHASSIS (KC -4F)

M (X2)

RCA -1603- P4 KINESCOPE \ PROTECTIVL

BHILLD

-SPEAKER CABLE

FEED BACK CABLE

FLX23) M (X 24)

TELEVISION INTERLOCK SWITCH

(51)

TELEVISION -POWER

SUPPLY CABLE

TELEVISION POWER SUPPLY UNIT (KK -7H)

x105-125 V.

AC. CABLE v 60 "v SUPPLY

TO TELEVISION POWER SUPPLY M -91112-I

Figure 3-Cabinet Wiring-Model TRK-90

YOKE SOCKET

HOR. CENT (R9

19 MOR. OUT.

WIDTH (R 94

le' NOR. OSC.

NOR..DISCH

-RI

17 NOR. SYNC AMP. VERT. SYNC. AMP

VERT LIN. (R 113

21 VERT. OSC. VERT DISCM.

HEIGHT(R IOB

22 VERT OUT

-Ri

-I I

VERT CENT (RII4)--. ±

co

o

CN C104

Arr.' 420 410

M (X4)

M(X6)

DEFL. YOKE

RADIO CHASSIS (RC -427F)

M(XIB)

M(X201

KIN. GRID LEAD

KINESCOPE CATHODE LEAD (YELLOW)

\TELEVISION INTERLOCK 5w. (S2)

KIM. KIN.CABLE SOCKET LEADS (H.

)

I I

mom 'FIXT) SPEAKER

, XIO 1'F(x9)'I

PILOT LAMP M(X14)

1_1 MIX121

SPEAKER CABLE

AC. CABLE ro

/ INTERLOCKS

FEED BACK CA B LE

1M(X24) (K 24) M

TELEVISION

-F SOUND CABLE

TELEVISION INTERLOCK SW. (SI)

IA (22)

F(X2UJ

RADIO POWER SUPPLY UNIT IRS- 83-E)

L -

PILOT 105-25 V. LAMP 60,v SUPPLY CABLE

RADIO POWER

SUPPLY CABLE

\AC. CABLE TO LEV. P VITEER SUPPLY

TELEVISION PO w ER

SUPPLY CABLE

TELEVISION POWER

SUPPLY UNIT (KK -7r)

M -91113-I

Figure 3a-Cabinet iring-Model TRK-120

NOR HOLO(R9ÿ ,Lfl.-FINE TUNING (C9) CONTRAST (R4 S)

VERT HOLD (R)oe) I I STATION BRIGHTNESS (Ret Ll SELECTOR

1 n (51,52, S3)

HOR DAMPING

T2 HOR.OUTPUT

TRANS.

cr.

o o (le

VERT. OUTPUT

T4 TRANS.

2 DET TRANS. ASSEM

OSC 1ST DET PI

HOR.OSC, TRANS.

2ND SYNC. SEA

make

Cae Cae Cal

I I

VERT. OSC. TRANS.

CB

12 IST SOUND IF.

P2

21"7)., L20 ADJ. ADJ.

FOUND I.F TRANS.

13 2140.

SOUND IF

L48)

ADJ.

P

.

2/ ND SOUND IF TRANS.

IS \` ELI SYNC.

SEP. L SYNC. AMP

C51 1 `/ C104 1 t4

OrKINESCOPE G SOCK

T l,6SQ7

L18.)

ADJ.

o SOUND 2 N0..

9 DET. NOISE I A.V.C.

LIMITER S TH. PIX. I.F.

TRANS.

L 3711

I

ADJ o

Ii

PI

L 28 ADJ

- -3 IST PIX I F

IST PIXIE At Left-Figure 5 TRANS. ASSEM. Top View Video Chassis

ADJ.

10 VIDEO AMP

e PIx.2 ND.

DET.

4 2140 PIX I F

211 THREE TRANS ASSEM SECTIONS

S 3RD PIX I F

3RD PIX IF TRANS

e 4TH PIX. IF.

4TH FIX IF. TRANS.

7 STH. P1)1

IF. KC -4F, KC -4H

RINGS

(Above) Figure 6 Recommended Type 6L6 Identification


48 RCA

MODELS TR11-90,TRK-120 Chassis KK-^F,KK-7H

óZ= w OO

/ O43 VOZ

/ £ i-'a Z / I-- 14)

Z=Oo QZ O Go Lu Q19 >z>. v>Ó I

C1.-1- rcá 1-'2N I'llI Q 0~ I

`ut i \ á U O I F ,n \ l'-.2

CC \ W I

m r----

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<a \ '/

<\ \ ai o`

w v0 OZB

1 I' \ \\ 01


RCA PAGE 13-49

RCA MFG. CO., INC. The finest television receiver built may be said to be only

as good as the antenna design and installation. It is therefore important to use a correctly designed antenna, and use care in its installation.

The RCA Double Dipole Antenna, Stock No. 9871, is recommended for use with these receivers. Both this antenna and the "V" antenna described below are especially designed

for a sufficient broad frequency response to cover the con- templated television spectrum with good efficiency and are 'therefore superior to a single Dipole type antenna.

When greater signal pickup, or where a shielding effect from noise sources or image reflections are desired, a reflector assembly, Stock No. 9872, may be added to the Stock No. 9871 Antenna to obtain an improved signal-to-noise ratio.

The RCA Double "V" Wire Type Television Antenna is an alternative type of antenna designed for television sight and sound reception. Two points of support are necessary. It serves adequately in suburban areas, but may not be suffi- ciently flexible in congested city areas where bad reflections and interference are encountered. Antenna Installation.

In most cases, the antenna should not be installed permanently on the apartment or residence roof until the quality of the picture reception has been observed on a Television receiver. A temporary transmission line can be run between receiver and the antenna allowing sufficient slack to permit moving the antenna. Then, with a telephone system connecting an observer at the receiver and an assistant on the roof to find an antenna location, the anténna can be positioned to give the most satisfactory results on the received signal. A shift of only a few feet in antenna position or direction may effect a tremendous difference in picture reception.

Whenever possible, the antenna location should be chosen or erected so the antenna is not only broadside to the transmitter but removed as far as possible from highways, hos- pitals and doctors' offices and similar sources of interference. Auto ignition and diathermy apparatus may cause noise interference spoiling the picture.

In mounting any antenna, care must be taken to keep the antenna rods or pickup wires proper at least i/4 wave length (at least 6 feet) away from other antennas, metal roofs and gutters or metal objects. Under certain extremely unusual conditions, it may be possible to rotate or position the antenna so it receives the cleanest picture over a reflected path. If such is the case, the antenna should be so positioned. However, such a position may give variable results as the nature of reflecting surfaces may vary with weather conditions, as a wet surface has been known to have different reflecting characteristics than a dry surface.

In short, a television receiving antenna and its installation must conform to much higher standards than an antenna for reception of International Short Wave and Standard Broad- cast signals because:

(1) Intervening obstacles have a pronounced shielding effect on the ultra -high frequency waves producing low intensity signals. Severe trouble with multi -path transmissions may be experienced, especially in congested city areas.

(2) The picture signal is comprised of a very wide band or range of frequencies, all of which must be received with good efficiency.

(3) It must be continually remembered that the discern- ment for the eye is much more critical than that of the ear.

Transmission Line RCA Victor has made available two types of exterior trans-

mission lines. One is a special low loss weather -proofed line having the correct surge impedance to match the RCA Victor Television antennas and the RCA Victor Television receivers. It is carried as Stock No. 9882 in 1,000,foot rolls. The second type is a standard weather -proofed line, also having the correct surge impedance for proper antenna and receiver matching. It is carried as Stock No. 12430 in 90 -foot rolls, Stock No. 12429 in 45 -foot rolls and is available in 1,000 -foot spools as Stock No. 9881. Use of improper lines may result in excessive loss or may lead to line reflections, resulting in multiple images or "ghosts," thus marring the reception.

MODELS TRK-90,TRK-120

For transmission line runs up to 200 feet, and where the signal strength on the antenna is relatively high, the Stock No. 12430, or Stock No. 12429 transmission line may be used. For all other applications the Stock No. 9882 transmission line is recommended. In some areas of very high. signal intensity, a lead coverer

transmission line may be advantageous.

Five -Television -Channel, Receiver Kinescope Installation (TRK-90).

1. Remove back cover of cabinet. 2. Remove the two screws which secure the wooden block,

on which the yoke is mounted, to the upper shelf, and drop this block and yoke away from the shelf.

3. Loosen the thumb screw in the center of the slotted block of wood on the top shelf, pull this block of wood towards the rear of the cabinet and turn it so that the "V" slot on the front end of the block is to your right.

4. Wearing gloves and goggles, carefully slide the Kine- scope on the "V" in the block, and turn both the block and the Kinescope so that the Kinescope faces the viewing window. Sl?de the Kinescope up to the mask in the window and fasten loosely in place by sliding the "V" block up to the bottom of the Kinescope face, and fastening it with the thumb screw.

5. Place the yoke änd the wooden block on which it is mounted, on the Kinescope neck, rotate the block 90° from its original mounting position in order to have it clear the top of the cabinet and slide it into position on the Kinescope neck. DO NOT FORCE YOKE. In some cases where the yoke lead is too short it may be necessary to loosen the "V" block and swing the Kinescope neck to the left in order to be able to place the yoke on the Kinescope neck without forcing.

6. Fit the upper part of the wooden yoke mounting block into the slot on the underside of the cabinet top and fasten the lower end of the block securely by means of the two screws. The Kinescope should be mounted loosely in ,place, so that the yoke is not forced on the Kinescope neck at any time.

7. Loosen the wing nuts on the yoke mounting bracket, and move the yoke forward on the neck of the Kinescope so that it pushes the Kinescope against the mask. Tighten the wing nuts to hold the Kinescope and yoke securely in this position. 8. It may be necessary to rotate the Kinescope, within the limits allowed by the high voltage second anode lead, with respect to the mask in order to obtain proper masking of the

edges on the Kinescope screen. Before rotating the Kine- scope, the screws holding the yoke mounting block should be loosened, so that the Kinescope neck will not be forced. 9. Move the "V" block forward so that it holds the bottom of the Kinescope in place. Tighten the thumb screw. 10. Place the second anode lead on the second anode cap at the side of the Kinescope. 11. After the receiver is operating, and if the picture is not squared with the mask, .using a screw driver loosen the clamping screws on the band around the yoke and rotate the yoke until the picture is squared with the mask, then tighten these clamping screws securely.

CAUTION: When removing the back cover of the cabinet, after the screws have been removed do not allow the cover to slide down on the neck of the Kinescope, or the neck of the Kinescope may be snapped off. Kinescope Installation (TRK-120).-Refer to figure 4.

1. Remove back cabinet cover. 2. Remove the top safety glass cover by removing the three wing nuts "E" at the two front corners and right rear corner of tue cover and loosening the wing nut "E" at the left rear corner of the cover. 3. Lift the cover straight upwards, taking care not to scratch the cabinet finish with the protruding screws or the cover itself.

4. Loosen the two wing nuts "F" on the yoke holding frame, and allow the yoke to drop down as far as possible.

5. Using gloves and goggles, open the Kinescope shipping carton and remove the top cover on the Kinescope.

©John F. Rider


50 RCA

MODELS TRK-90,TRK-120 RCA MFG. CO., INC. 6. Remove the Kinescope from the shipping carton (do

not remove the close fitting cardboard shield from the Kine- scope), and insert the Kinescope into the cabinet, guiding the neck of the Kinescope into the yoke. Do not force the neck of the Kinescope into the yoke, or the tube may break. Let the Kinescope down slowly so that it finally rests on the yoke.

7. Rotate the Kinescope and cardboard container (but not the yoke), so that the second anode cap at the side of the tube is towards the front of the cabinet.

8. Place the white rubber mask on the face of the Kine- scope, with the ribs on the mask facing upwards toward the mirror. Line up the mask so that it masks the edges on the Kinescope face. Then, if necessary, lift the Kinescope and rotate it so the mask is approximately squared up with the cover opening. The second anode cap should be kept towards the froht of the cabinet.

9. Replace the safety glass cover and wing nuts. Tighten wing nuts to hold the cover securely.

10. Loosen the wing nuts "F" on the yoke mounting bracket and push the two metal brackets, on which the bottom of the yoke rests, upward, until the rubber mask rests against the top cover. If the mask and the cover opening do not line up, rotate the cone -shaped Kinescope shield until they do. Tighten the wing nuts to hold the yoke and tube in this position. In some cases it may be necessary to loosen the four screws holding the yoke support to the wooden frame and shift the yoke support to make the mask and Kinescope line up symmetrically with the cover opening.

11. Place the second anode lead on the second anode cap at the side of the Kinescope.

12. After the receiver is operating, and if the picture is not squared up with the cover opening, the two screws "H" on the band around the yoke should be loosened, and the yoke rotated to square up the picture, then these screws should be tightened with a screw driver.

Focusing Control.-This is a screw driver adjustment located on the right side of the cabinet near the base.

Adjustments.-There are a series of screw driver slot ad justments at the rear of the TRK-120 (at the side of the TRK-90), used to obtain the proper picture size, centering, and vertical distribution. These adjustments are explained fully in the receiver operating instructions

Video Chassis KC -4F, KC -4H When it is desired to measure any voltages on this chassis,

the primary leads of the high voltage transformer T6 should be disconnected and taped together.

When any changes have to be made in the Video chassis, tilt lead and part locations should be replaced as closely as possible to the original positions.

Because of the special equipment and procedure necessary for the proper alignment of these receivers, the alignment will be covered in a supplementary booklet.

Refer to the booklet: Practical Television by RCA, for detailed explanations of circuit operation in a Television receiver. Service Hints:

1. Poor Horizontal Distribution of the picture elements may be due to a 6L6 tube. RCA -6L6 tubes of known recent manufacture are the only tubes recommended for the Hori- zontal sweep output circuit. By careful scrutiny, these tubes can be identified by the three "rings" or sections welded to-

gether at the base ring of the tube, as shown in Figure 6. If any other 6L6 tube is used in this position it will break down in a vèry short time.

2. If the picture "tears out" when the receiver is jarred it may be due to microphonic 6AB7, 6AC7 or 6J5 tubes.

3. The 6J5 oscillator tube should be removed without rocking it in its socket to loosen it, as the rocking motion may cause the 80.5 mmf capacitor to break off.

4. The coils in oscillator circuit should not be touched or moved or the alignment of the receiver will be disturbed.

5. The insulator on the filter capacitors may become dirty and break down to short out the high voltage.

6. The Video coupling capacitors C50, 53, 59 should be kept clear of chassis.

7. A gassy 2V3 -G tube may cause resistor R-137 to burn. Replace 2V3 -G tube, and resistor, if necessary.

8. Changing the position of the oscillator shield plate will disturb the alignment.

Calibration Scale

Eleven -Tube, Three -Band, Electric Tuning, AC, Superheterodyne Broadcast Receiver

III

0 IO 20 30 40 50 601170 II

80 90 100 110 1 150 140 150 160 170 180

aee, EASTERN NIGIOPIIIE

0M HONG KONG - N'IMONELD - ROMS LONDON - SO*EICTADY - MASSIG SIO - MON - /MAMS+MA 31 M

Raul - TOKYO - PTTTIILMOH LONDON - sown LONDON - ROME - PARIS UM IN - ITTSEPON NYISIN 25M PRAGUE AMTS 19M PAID

IMUN - LONDON N. YORK - PARIS

16M NUIrEN

Ill// - NrTI1URON LONDON - $CHEWY 13M NEW YORK

. . . . I . . I I . . e . . . I . . . . R . . . . R . . i . R . . . . I . . . . I

550 600 700 800 1000 1200 1400 1600

. I 2.5 3.0 4.0 5.0 6. 7.0

. I .0 . 1 . . .

120 M TROPICAL MOADCAST AMERICAN POLICI

AIRCRAFT 90M TROPICAL MOADCAST

AMATEUR 60 M AIRCRAFT 49 M ONOMNATI - TORONTO

KHAEAROVSR TROPICAL MEMO QTY- OIICA00 - N. YORK

MOADCAST HAVANA - IMAN - PITTISUION

MC

0 10 20 30 40 501 60 70 80 90 100 110 120 130 140 150 160 170 180

IIl11IIIIlI

Tuning Dial, and Corresponding 0-180° Calibration Scale

The corresponding dial setting for any reading of the calibration scale can be determined by drawing a line straight up

from this point; for example, 151° on the. calibration scale corresponds to a dial reading of 1,500 kc on "A" band. Read instructions under "Alignment Procedure.'-'


RCA PAGE 13-51

RCA MFG. CO INC MODELS TRK-90,TRK-120 Ch.RC-427(Receiver)

General Description Radio receiver chassis No. RC -427 is used in RCA Victor

Television Console Models TRK-90 and TRK-1[20. C t I C

IA AI The audio output of the television chassis is connected to

1

the audio input of the radio chassis by means cf jack X-17 B 6

and section S7 of the fidelity switch. The functions of this RANGE INDICATOR switch are tabulated on the following page.

A separate plug-in power unit, RS -83E, is used to supply 41414441441111:111 113I

heater to the Service data t z a o s e , e q and plate voltages radio chassis. and diagram for this power unit are shown below. pPoip

At Right-Location of Controls (Radio) soFT J'E`i1) ero

AQc

0,/, CODD 7 ,ò,1 my

POWER -VOLUME FIDELITY TUNING RANGE SEC Schrntatic Diagram, RS -83E CONTROL SELECTOR CONTROL SELECTOR

TI GREEN -RED TR. RED I

-_ i f. RECT 5V. 5 U4 G

FIL GREEN-FEDTR, RECT 3(O0 V.

1 BROWN PLATE loon© PLUG

3.5 I 10On + C1 o:CABLE 0 GA MFD.

10 HEATER gRowN Il -j I

b 6.5V -

PILOTP LAM

BFOwti-@LACK BROwrr 24 V. MOTOR BLUE BLUE 8R !í1 10 1n BLUE Bt Ac l< v 1

V.EI LOW- IEL LOW

YELLOW BREEN

REO BLACK- RED TR RED BLACK - iseo

Fidelity Switch (S4, S5, S6, S7) M 86727 RS 83E

- Switch Position For I -F

Amp. Audio Amp,

110-V. Supply Tele. for

Chassis Chassis Osc. +B Supply

Dial Lamps **

No. 1 (Counter-

clockwise) Victrola - Min. Highs Off Off On

No. 2 Victrola - Max. Highs Reduced Lows Off Off On

No. 3 Victrola - Full Range Off Off On

No. 1 Radio Sharp Min. Highs Max. Lows Off On On

No. 2 Radio SharpMax. Highs Reduced Lows Off On On

No. 3 Radio Sharp Max. Highs Full Lows Off On On

No. 4 Radio Broad Full Range Off On On

No. 1 Television - Min. Highs On Off Off

No. 2 Television - Med. Highs Reduced Lows On Off Off

No. 3 Television - Full Range On Off Off

* Controlled by switch (S12) on rear of fidelity switch. ** The 1st-I.F, heater is opened on television positions 1, 2 and 3.

©John F. Rider


52 RCA MODELS TRK.-90,TRK-120 RCA MFG. CO., INC. Chas .RC -427

RED RED -BLACK TR.

Connections and Colors of Loud- speaker and Cable

TRK-120 for 105-125 Volts - General differences are as follows:

Miscellaneous Data for Radio Chassis FEED BACK Xg CONNECTOR - -

PLUG (PRONG VIEW)

BROWN

RED-YEL. YELLOW

31I-643 BLACK TERMINAL BOARD

Chassis KC -41

1. Tube No. 21 formerly RCA-5V4G changed to RCA - 25Z6 and socket wiring revised.

2. Circuit changes are indicated on the schematic diagram (Fig. 9).

Chassis KK -71

I. Capacitors C-118 (80 mfd.) and C-119 (10 mfd.) added in parallel with C-110.

2. Capacitor C-128 (0.25 mfd.) added in parallel with resistor R-166.

3. Capacitors C-11'3 (0.03 mfd.) and C-114 (0.03 mfd.) changed to C-121 (0.1 mfd.) and C-122 (0.1 mfd.)

4. Power transformer (T-5).changed to (T-8) having a 25v. heater winding to supply the RCA -25Z6 horizontal damping tube.

5. High voltage power transformer (T-6) changed to (T-9).

6. Resistor R-165 is added. 7. Inductance L-50 is 100 ohms in this model. 8. An RCA -5T4 replaces the RCA -5U4 -G.

In addition Kinescope shielding is provided as follows: 1. A metallic conical section is installed in the cabinet to

shield the Kinescope bulb. 2. A double metallic cylindrical section is installed with the

deflecting yoke mounting assembly to shield the deflecting yoke proper. The accompanying illustration shows its assembly.

CAUTION: The conical shield is of the proper size to permit installing the 1803P4 Kinescope with its protective cardboard sleeve. The latter should never be removed.

To prevent Kinescope breakage, when installing a Kine- scope, the deflecting yoke and shield assembly must be in place. To- prevent breakage of Kinescope when removing the deflecting yoke and shield assembly the Kinescope must be removed first, Replacing or orienting deflecting yoke:

1. Remove Kinescope. 2. Loosen yoke support bracket wing nuts and remove

complete yoke and shield assembly. 3. Remove outer shield. Loosen yoke clamp screws to

permit removal or orientation of yoke. If it is necessary to orient yoke, pull yoke out so it extends about one inch. Tighten screws just enough to hold yoke but not too tight as it may be necessary to turn it in this extended position. Replace the inner shield and yoke in the yoke mounting brackets.

4. Replace Kinescope and protective glass cover. 5. Move the inner shield and yoke assembly vertically

until yoke is gently touching Kinescope bulb. Tighten yoke bracket wing nuts.

(1)

(2) (3)

Precautionary Lead Dress

All A -C leads should be twisted together and dressed awa`.y from parts in chassis to prevent hum pickup.

Keep pilot light leads away from 6R7 grid.

Yellow, green, .and black leads from fidelity switch to 1st i -f transformer must be twisted together and dressed away from chassis. The same applies to the 2nd i -f transformer leads.

Victrola Attachment A jack (X-16) is located near the antenna terminal board

for convenience in plugging in a Victrola Attachment. The cable from the Victrola Attachment should be terminated in a Stock No. 31048 plug to fit the jack.

50-60 Cycle Power Supply 6. Rotate yoke carefully with one hand to orient raster or

picture. 7. Remove Kinescope. 8. Remove carefully (so as not to disturb yoke adjustment)

the inner shield and yoke assembly. Place the latter on a flat surface with the extended yoke end flush to surface. Press inner shield gently down until yoke edge is flush with inner shield edge. Tighten yoke clamp screws evenly by first pull- ing one up and then the other.

9. Assemble outer shield to inner shield and yoke assembly so bottoms of shields are flush.

10. Replace complete shield and yoke assembly in the yoke support bracket.

11. Replace Kinescope and tighten protective glass cover. 12. Push gently complete assembly up flush against the

Kinescope bulb. Tighten wing nuts.

IMPORTANT: 1. The hole in the conical metallic shield must line up with the hole in the protective sleeve to permit connection of the second anode cable.

2. Do not jar or drop the shields and keep away from the loudspeaker field coil to prevent magnetization.

KINESCOPE (1ß03-P4)

YOKE CLAMP (STOC Kr 32897)

2 R.H. MACH. SCRS 6-32 X

DEFLECTING YOKE

PROTECTIVE SLEEVE

(DO NOT REMOVE FROM TUBE)

CONICAL METALLIC SHIELD.

SLOT FOR WING NUT

OUTER SHIELD

WING NUT 10-32

INNER SHIELD

DEFLECTING YOKE SHIELD ASSEMBLY

M-91125

Assenzbly Details, Showing Kinescope and Deflecting Yoke Shielding


RCA PAGE 13-53

MODELS TRK-90,TRK-120 RCA MFG. CO., INC.

IMPORTANT PRECAUTIONS A good ground should be connected to the receiver former have been unsoldered from the supply line,

at all times. and taped.

Always wear gloves and shatter -proof goggles when Use only one hand when working on the video or

handling Kinescope tubes. high voltage SPU chassis, and always connect a shorting lead to ground (first), then to the high side of

Do not eliminate the protection afforded by the both high voltage filter capacitors. interlock switches. Make no voltage measurements on the high voltage

ALWAYS replace the shield can over the 2V3 -G (7,300 volts) SPU chassis.

high voltage rectifier. The most dangerous portion of Work on a television receiver should not be at - the H.V. supply is the plate lead of the 2V3 -G tube. tempted by anyone who is not thoroughly familiar

Do not measure any voltages on the video chassis with the precautions necessary when working on high

unless the primary leads of the high voltage trans- voltage equipment.

TUBE COVER SAFETY PROTECTIVE GLASS MIRROR (5033070 HINGE (S#33262)-,, KINESCOPE MA KING CUSHION S3307G MOUNTED IN LID

5328IS ÿ1 j' HANGER SC W 4 __ J

7 F-17 / 10-32x I.t' -ß_.1_r

1 i WING NUT

*10-32 O LID MECHANISM N' r

I ¡

1 I

LID MECHANISM ADJUSTING SCREW ADJUSTING SCREW =

k ,; j ,"""

_,l ///'''1J}}Ayyy\\\

R SCREWS PYJ PI/ 10-32 X 14'

, I

I

A _ et

2 R.H. MACH} SCRS.

LOTTEDIBRACKET)

2RH.MACH SCRS. 4-20x1\^J

2WING NUTS r \ lO

1

I D.H.MCH. SCR +

1# WASHER

2LOCKWASHr \ WING NUT 10.3 Q 2 FLAT WASHERS \ / `-{ 1.DUBBER : IyWOOD 1 BRACKET

^ F. o \\ RUBBER WASHER

CENTERING 4r

\

KINESCOPE

/

/

RADIO CHASSIS

(RC -42/F) SLEEVE

FLAT WASHER O N 0 ®

1 WIDTH

TELEVISION CHASSIS

(KC -4F)

(Igp+-pq) \ \ \

\ \V

/

//

e LOCK WASH ER

SCREW

DETAILA"

® LINEARITY

0

PROTECTIVE SLEEVE \

(DO NOT REMOVE FROM TUBE)

/ + /

7

I

/

} -'} "--1L

r

2

2 R.H.

2 R.H.WOOD

-SEE DETAIL Ä SELF TAP SCRS. #14X 2°

MACH. SCRS.;-2OX if

SCRS. 14 X I O U HEIGHT Ii I

1 -J- YOKE CLAMP

IíD,I ('-",32897) I 40

©2RHMACH.CRS. í

6-32X t 2WING NUTS 10-32 OF FLAT WASHER

CING T .-YOKE CLAMP BRACKET - NUT SCREW

4 ,u19: AM /' \ij l'I i SEE

,' 2 SELF

E R.H. MACH.

2R. H. WOOD

DEFLECTING DETAIL 'f\'' YOKE

TAP SCRS.I4X2' SCRS.4- 2O XIi2"O

SCRS.I4x12 O

13-- -0--- T BUSHING , -FLAT WASHER d -LOCKWASHEP. ®f NUT LOUDSPEAKER

RL -70-S )

SPEAKER MOUNTING

DETAIL

INTERLOCK SWITCH

INTERLOCK SWITCH

FOCUS CONTROL

K \ 7r-- 4 TELEVISION-HIGH AND

LOW VOLTAGE- POWE R SUPPLY (K K-7 F )

1

POWER SUPPLY CHASSIS xz+ xzz -FUSE COVER (R5 -83-E) FOR RADIO CHASSIS -a ®

O //wry

3/4AMP. FUSE 3 AMP FUSE

H. MACH SCRS. 6 D.H. MACH. SCRS. óC j-20 X Ii }-20 X If

4 FLAT WASHERS G FLAT WASHERS 1...G13145- Z

©John F. Rider


54 RCA


RCA PAGE 13-55

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RCA MFG. CO., INC. ODELS TR& -90, Chas .RC -427G TRg-120, Chas .RC -427F

uni

6-1E A$ pp

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56 RCA.

MODELS TRK-90, TRK-120 Chas .RC -427G, 427F

Alignment Procedure (RADIO CHASSIS)

At Right-Tube and Trimmer Locations

Cathode -Ray Alignment is the preferable method. Connections for the oscillograph are shown in the chassis drawing.

Output Meter Alignment. - If this method is

used, connect the meter across the voice coil, and turn the receiver volume control to maximum.

Test -Oscillator. - For all alignment operations, connect the low side of the test -oscillator to the receiver chassis, and keep the output as low as possible to avoid a -v -c action.

Calibration Scale on Indicator -Drive -Cord Drum.-The tuning dial.is fastened in the cabinet and cannot be used for reference during alignment, therefore a calibration scale is at-

tached to the rear of the indicator -drive -cord drum which is

mounted on the front shaft of the gang condenser. The setting of the gang condenser is read on this scale, which is

calibrated in degrees. The correct setting of the gang in degrees, for each alignment frequency, is given in the alignment table.

As the first step in r -f alignment, check the position of the drum. The "0" mark on the drum scale must be vertical, and directly over the center of the gang -condenser shaft when the plates are fully meshed. The drum is held to the shaft by means of two set screws, which must be tightened securely when the drum is in the correct position.

RCA MFG. CO., INC.

C4 20MC

C9 1500KC

2n9 AUDIO AMPL

RE

Dsç

C2 1500KC

6K1 C15 1500KC

6J1

5111 ANT CI

DET C14

CI

CS GIOOKC

L 10

e

KC

6A8

212 DET -A F

AVC-50UELCH c]! ,c.9:

I¢ DET L12

455 KC

IU I F

6R1

LIE 3"_° IF POWER

455'' OUTPUT

TRANS 9

259 I.E

TELEVISION VICTROLA i 4

I;J I

516 X17 F

5

TRANS

6K1

6K1

INPUT SOCKET

X19

o o o

PHASE INV POWER OUTPUT

L14 ITRAN5J455KC

10

A G

To determine the corresponding frequency for any setting of the calibration scales, refer to the accompanying drawing which shows the dial with 0.180° calibration scales drawn at top and bottom.

Pointer for Calibration Scale.-Improvise a pointer for the calibration scale by fastening a piece of wire to the gang - condenser frame, and bend the wire so that it points to the "0" mark on the calibration scale when the plates are fully meshed.

Dial -Indicator Adjustment.-After fastening the chassis in the cabinet, attach the dial indicator to the drive cable with indicator approximately 1/16 -inch above end dots at low - frequency ends of bands with gang condenser fully meshed. See that pointer does not rub background screen or dial face. The indicator has a spring clip for attachment to the cable.


side of test- osc. to-

Tune test- osc. to-

Set tuning gang to-

Adjust the following- To obtain-

Turn fidelity switch to No. 3 radio (sharp).

2 6K7 2nd I -F grid

cap, in series with .01 mfd.

455 kc

Quiet point

on "B" band

L15, L16 (3rd I -F Trans.) Coincidental

images on cathode-ray oscillograph, or max. out-

put on output meter.

3 6K7 1st I -F grid


L13, L14 (2nd I -F Trans.)

4 6A8 1st Det. grid


L11, L12 (1st I -F Trans.)

5 Turn fidelity switch to No. 4 radio (broad). The cu rve on CRO should broaden out to a double peak and reduce gain nearly 50%.

6 Turn fidelity switch to No. 3 radio for the following adjustments. Back out the "B" and "C" oscillator trimmers, C5 and C4. Preset "A" band oscillator trimmer, C9, approximately an inch out.

7

Antenna terminal, in series with 100 mmf.

600 kc 600kc (31°) "A" band L10 (osc.) Max. Output

8 1,500 kc 1,500 kc (151°) " "A" band

C9 (osc.) C2 (ant.) C15 (det.)

Max. Output

9 600 kc 600 kc "A" band L10 (osc.)

Rock in for Max. Output

10 Repeat step No. 8.

11 Antenna terminal, 6,100 kc 6,100kc (140°) "B" band C5 (osc.) Max. Output f

12

in series with 300 ohms 20 mc 20 me (146°)

"C" band C4 (osc.) Rock in for Max. Output s

Follow "Adjustments for Electric Tuning "

* Use minimum capacitance peak if two peaks can be obtained. Note: The oscillator tracks 455 kc above the signal on all bands.


RCA PAGE 13-57

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58 RCA MODELS TRK-90,TRK-120 RCA MFG. CO., INC.

Electric Tuning Mechanism When a station button is pushed in, it completes the 24 -

volt circuit through the corresponding station -setting contact and one-half of the brass selector disc, which is connected to one side of the motor field coil. This energizes the motor, and the rotor is pulled forward,'engaging with the gear train that drives the tuning condenser and selector disc. The condenser and disc rotate until the insulation line comes under the particular station -setting contact, and the motor circuit is broken.

When the electric tuning mechanism is in action, the motor -supply voltage is fed into a diode rectifier circuit which applies a high bias to the first -audio amplifier. This prevents audio amplification and makes the set quiet or "mute" while the mechanism is operating.

LUBRICATE GEARS WITH PETROLEUM JELLY USE LIGHT MACHINE OIL ON GEAR BEARINGS.

ROLLER, 32066

GEAR MESH ADJUSTMENT STUD (SET FOR MINIMUM BACK -LASH AND FREEDOM FROM BINDING BY ROTATING

ELECT POLY TI C 60 MFD., 320 88 (50-60e.)

REMOVE SPRING WREN MOTOR IS OPERATED IN VERTICAL POSITION

MOTOR 32095 (50-6o.

ROTOR 15 PULLED FORWARD WHEN MOTOR IS ENERGIZED AND THE ROLLER ENGAGES THE DISC.

DAMPER .32093

KNOB SHAFT

KNOB SHAFT PULLEY,31271

_CONDENSER DRUM DRIVE CORD

KNOB SHAFT DRIVE SAND HUB,31239

DISC AND PINION, 32096

le 01- PLAY

+ \ LUBRICATE KNOB SHAFT BEARINGS WITH PETROLEUM JELLY

USE LIGHT MACHINE OIL AT MOTOR BEARINGS

C WASHER

Adjustments for With power turned off, disconnect the antenna transmission

line' and ground connection, turn fidelity control to radio (3rd radio position -6th position from full counter -clockwise). Remove the back from the cabinet and reconnect the antenna transmission line and ground connection. The two interlock switches on the side panels should not be touched and care should be taken not to press on them when making the push-button set-up. Then turn on power, set range -selector to "A," allow a few moments warm-up period and proceed as follows: 1. Make a list of the desired nine stations, arranged in order

from low to high frequencies. 2. Turn on power -volume control, turn range selector to

"A" band, and allow a few minutes for warming up. 3. Press down the "dial -tuning" (right-hand) button.

32231

LUG METAL WASHER

O SPRING SPRINGT CONTACT 31230 6ODY 31232 31231

maim' KgIMENE

32232 / 3M -EE]

NON

\ FIBRE

o FIBRE

WASHER

I

Components of Station Setting Contact

At Right-Dial Mechanism

The brass selector disc is fastened to the rear shaft of the tuning condenser by means of two set -screws. When the condenser is at maximum (plates fully meshed) the insulation line should be horizontal, with the operating -end at the left (viewed from rear). The brass is beveled at this end.

The selector disc should be set so that the contact -tip plungers in the station -setting contacts project not more than 1/16 -in. from the body of the contacts.

LUBRICATION Motor bearings and gear bearings; use light machine oil. Gear faces; use "Pure Oil No. 611" or petroleum jelly. Dial -indicator pulleys and rails; use "Castordag" or petro-

leum jelly. Selector disc; apply thin film of petroleum jelly.

PUSH BUTTON ADJUSTER PINS'

INSULATION LINE

GEAR BRASS `DISC

ANTENNA TERMINAL BOARD

TOG TO"A3- (ON BACK OF CABINET)

PILOT LIGMT

TELEV SION CONNECTOR

TO TELEVISION CHASSIS

VICTROLA CON N ECTOR

Color of Lead Station To Station -Setting Button Contact No. 1 Yellow -green No. 2 Black No. 3 Brown No. 4 Blue No. 5 Green

Electric Tuning

Color of Lead Station To Station -Setting Button Contact No. 6 Red No. 7 Red -black No. 8 Brown black No. 9 Red -yellow

4. Manually tune in the first station on the list.

5. Hold down the "dial -tuning" button and press down station button No. 1 (left-hand). Both buttons will stay down. Move station adjuster contact pin No. 1 to the insulating line on the disc at rear of gang. When the pin is correctly centered on the insulating line, the central dial lamp will go out completely.

6. Press down any other button in order to release the dial tuning button and station button No. 1. Tune to some other section on the dial, and then press down station button' No. I again; the electric tuning mechanism will function to tune in the first station, and the central dial lamp will stay on.

7. Repeat this process for the remaining stations.

INDICATOR DRIVE CABLE 32635

SPRING 1368 SPRING 31418

Il DRUM 31273

TUNING KNOB SHAFT PULLEY 31271

3TURNS

(TUNING CONDENSER IN FULL

K90600-0 RC-E2T

SPRING r INDICATOR 31279tÿ1 STRIP

ONDENSER DRUM DRIVE 1

CORD 32634

CORD 32634 I VBAND-SWITCH IN FRONT GROOVE OF DRUM) SHAFT PULLEY 31272

MESH POSITION) BAND DRIVE

INDICATORCORD


RCA PAGE 13-59

MWELS -90,TRñ-120 RCA MFG. CO., INC.

Replacement Parts Insist on lsuulns factory -tested paru, which are readily identified and may be purchased from aa/serlsed dealers.

STOCK No.


STOCK No. DESCRIPTION

Unit List Price

TELEVISION CHASSIS ASSEMBLIES 33208 Control -2.7 meg. "Height" control (R108) 1.00 KC -4F in TRK 120 (80 cycle) 4574 Plug -6 -prong male plug for Television chassis KC -4J in TRK 120 (50 cycle) power supply cable (X14) .48

KC -4H in TRK 90 (60 cycle) 16836 Plug -8 -prong male plug for Television chassis power supply cable (X12) .25

33387 Adjuster -Magnetite core and stud in tube for 14671 Resistor -SS ohms, } watt (R152) .20 high frequency oscillator circuit adjustment 35568 Resistor -Voltage divider comprising a 70, 7.4 (Used with L11, L12, L14, L15) .55 and 5 ohm section (R162, R163, R164).... .60

33835 Adjuster -Magnetite core and stud in tube, for 14074 Resistor -82 ohms, } watt (R64, R87, R14, high frequency oscillator circuit adjustment R21, R28, R34) .20 (Used with L13) .55 13428 Resistor -150 ohms, 4 watt (R39) .20

31259 Board -4 terminal antenna -ground terminal board .25 13454 Resistor -270 ohms, 4 watt (R141) .20 12884 Capacitor -Adjustable plunger type air trimmer 13219 Resistor -270 ohms, 2 watts (R97) .25

(C8) .60 30499 Resistor -470 ohms, 4 watt (R90, R95) .20 33097 Capacitor -4.7 mmfd. (neg. temp. coeff.) (C69) .35 35567 Resistor -Voltage divider comprising a 900- 33478 Capacitor -5.6 mmfd., 500 volts (C7) .40 3,100-6,600.7,800 and 1,470 ohm section 33476 Capacitor -8.2 mmfd., 500 volts (C8) .40 (R158, R159, R160, R161) 1.00 33381 Capacitor -8.2 mmfd., (neg. temp. coeff.) (C71) .40 14720 Resistor -1,000 ohms, 4 watt (R9, R65, R70, 33380 Capacitor -12 mmfd., 500 volts (C24) .40 R18, R41, R25, R31, R37, R42) .20 33100 Capacitor -18 mmfd., 500 volts (neg. temp. 14993 Resistor -1,200 ohms, 1/10 watt (R17) .15

coeff.) (C19, C23) .40 12267 Resistor -1,200 ohms, 4 watt (RI15) .20 33101 Capacitor -22 mmfd., (neg. temp. coeff.) (C64) .40 14499 Resistor -1,500 ohms, 4 watt (R8, R24) .20 33102 Capacitor -47 mmfd., (neg. temp. coeff.) (C30, 31920 Resistor -1,800 ohms, 1/10 watt (RIO, R23,

C35, C86, C72) .45 R30) .15 33103 Capacitor -88 mmfd., 500 volts (C31, C36, 12194 Resistor -1,800 ohms, 4 watt (R112) .20

C15, C25, C40, C44, C49) (neg. temp. coeff.) .35 11883 Resistor -2,200 ohms, 1/10 watt (R36) .15 33477 Capacitor -80.5 mmfd., 500 volts (Cl6) .45 13488 Resistor -2,200 ohms, 1 watt (R6) .22 33104 Capacitor -82 mmfd. (neg. temp. coeff.) (C21, 13031 Resistor -3,300 ohms, 1/10 watt (R19, R26) .15

C22) .45 12312 Resistor -3,300 ohms, I watt (R77, R87).... .20 33106 Capacitor -115 mmfd. (C5) .30 30150 Resistor -3,300 ohms, 1 watt (R7, R57) .22 33107 Capacitor -135 mmfd. (C4) - .30 12955 Resistor -3,900 ohms, 4 watt (R109) .20 12725 Capacitor -150 mmfd., 400 volts (C10, C87).. .35 35943 Resistor -3,900 ohms, } watt (R139) .20 33108 Capacitor -190 mmfd. (CS) .30 30146 Resistor -4,700 ohms, 4 watt (R83, R99) .20 12488 Capacitor -270 mmfd. (C81) ' .35 31789 Resistor -5,600 ohms, 1/10 watt (R12, R142,. 33109 Capacitor -320 mmfd. (C2) .30 R143) .15 33110 Capacitor -390 mmfd. (Cl) .30 12265 Resistor -8,800 ohms, } watt (R11, R140).. .20 31730 Capacitor -820 mmfd. (C123) .40 14075 Resistor -8,200 ohms, } watt (RI01, R102, 32788 Capacitor -820 mmfd., 400 volts (C84, C89) .40 R103) .20 12635 Capacitor -1,000 mmfd., 400 volts (C90) .50 14559 Resistor -10,000 ohms, } watt (R20, R27, RSS,

4881 Capacitor -3,300 mmfd., 400 volts (C102) .80 R13, R82, R84, R88, R100, R74, R147).. .20 34459 Capacitor -.0025 mfd., 1,400 volts (C124) .20 13097 Resistor -10,000 ohms, 1 watt (R79, R80)... .22 33584 Capacitor -.005 mfd., 1,200 volts (C11, C12, 13594 Resistor -15,000 ohms, 1/10 watt (R4S) .15

C13, C14, C18, C20, C26, C27, C29, C32, 35944 Resistor -15,000 ohms, } watt (R149) .20 C39, C94, C37, C38, C39, C41, C42, C43, 14284 Resistor -22,000 ohms, 1/10 watt (R71) .15 C45, C48, C47, C48, C52, C60, C82, CBS, 13998 Resistor -22,000 ohms, 3 watt (R47, R49) .20 C85, C67, C68, C70, C75, C98, C99, C100) .25 12738 Resistor -27,000 ohms, } watt (R91) .20

4937 Capacitor -.01 mfd., 1000 volts (C74) .25 11300 Resistor -33,000 ohms, 1/10 watt (R10) (early 4870 Capacitor -.025 mfd., 400 volts (C107) .20 production only) .15

30882 Capacitor -.05 mfd., 200 volts (C94, C95) .20 35945 Resistor -33,000 ohms, ; watt (R5, R13B)... .20 32787 Capacitor -.05 mfd., 400 volts (C28) .20 12412 Resistor -47,000 ohms, } watt (R99) (R10-

4888 Capacitor -.05 mfd., 400 volts (C91) .20 late production only) .20 4839 Capacitor -0.1 mfd., 400 volts (C7S, C53, C77, 12010 Resistor -68,000 ohms, 1/10 watt (R32, R38,

C78, C85, C59, C88, C103) .SO R69) .15 12484 Capacitor -0.25 mfd., 350 volts (C86, COS, 13715 Resistor -68,000 ohms, 4 watt (R6S, R66) .20

C101, C106, C80, C78, C105) .30 14138 Resistor -88,000 ohms, I watt (R15, R22, 12741 Capacitor -.5 mfd. (C57) .30 R29, R35, R40, R68) .20 32145 Capacitor -4 mfds., 450 volts -(Used in 50 cycle 14023 Resistor -82,000 ohms, 4 watt (R78) .20

chassis only) .70 30435 Resistor -82,000 ohms, 1 watt (R144) .22 33158 Capacitor -10 mfd., 150 volts, 20 mfd., 25 volts, 14560 Resistor -100,000 ohms, } watt (R72, R85,

(C97. C104) 1.00 R86, R89, R104, R145) .20 33878 Capacitor -10 mfd., 450 volts, 10 mfd., 450 30180 Resistor -120,000 ohms, ! watt (R4) .20

volts, 10 mfd., 150 volts (CI25, C126, C127) 1.85 12264 Resistor -220,000 ohms, } watt (R51, R111). .20 33160 Capacitor -10 mfd., 350 volts, 10 mfd., 150 12285 Resistor -470,000 ohms, 4 watt (R46, R59,

volts, 20 mfd., 25 volts, 20 mid., 25 volts R96) .20 (CO2, C79, C82, C93) 1.60 12488 Resistor -580,000 ohms, I watt (R151) .20

32045 Capacitor -15 mfd. (C96) .70 13730 Resistor -I meg., } watt (R1, R2, R76, R75, 33161 Capacitor -20-50 mfd.. 35 volts (C51, C108) 1.45 R73, R52, R60, R81) .20 33243 Coil -Oscillator coil with core and stud (L11).. .85 2546 Resistor -1 meg., 1 watt (R3) .22 35582 Coil -Il turn antenna coil, core, stud, and capa- 30206 Resistor -1.2 meg., } watt (R105) .20

citor assembly (C5, L9, L10) 1.10 5028 Resistor -1.8 meg., } watt (R107) .20 33647 Coil -2 turn antenna coil, core, stud and capa- 12679 Resistor -2.2 meg., 4 watt (R110) .20

citor assembly (C4t L7, L8) (yellow or purple) 1.10 33229 Roller -Rubber friction roller for oscillator con - 33648 Coil -3 turn antenna coil, core, stud and capac- denser drive. Part of range switch assembly .10

itor assembly (C3, L5, L8) (orange or white) 1.10 33165 Socket -2 -prong female socket for Video output 33845 Coil -5f turn antenna coil, core, stud and ca- to Kinescope (X3) .25

pacitor assembly (C2, LS, L4) (red or black) 1.10 33011 Socket -4 -contact female socket for Kinescope 33644 Coil -71 turn antenna coil, core, stud and capacitor assembly (Cl, Ll, L2) (brown or blue) 1.10 deflecting yoke (X1) .25

35820 Coil -Peaking coil (1.51, R158) .55 31251 Socket -8 -contact octal type socket "Hor.

.25 35821 Coil -Peaking coil (L52, R146) .55 18007 Socket -Ceramic octal socket for 6L6

"Ose." 35818 Coil -Peaking coil (L53, R148) .55 out" and 8J5 .65 95817 Coil -Peaking coil (L54, R150) .55 14278 Socket -Television audio output pin socket (X5) .15

35815 Coil -Peaking coil (L55, R154) .55 33227 Switch -Range switch with shield plate and 35819 Coil -Peaking coil (L56, R153) .55 mounting studs -less coils, condenser and fric - 35816 Coil -Peaking coil (L57, R155) - .55 tion roller (SI, 52, S3) 4.85 33228 Condenser -Oscillator "Fine tuning" condenser, 33330 Transformer-"lst det. Pl" I -F transformer

located on range switch (C9) 2.10 (L17, L18) (br. and br.) 2.80 33164 Control -Dual 1.2 meg. and 30,000 ohms 33331 Transformer -"1st det. P2" I -F . transformer -

"Vertical hold" and "Horizontal hold" con- (L19, L20) (brown and red) 2.80 trois (R106, R92) 2.00 33334 Transformer -"1st pix P1" I -F transformer

33206 Control -6 ohm tapped "Horizontal centering" (L21, L22, L23, L24) (brown , and green).. 2.50 control (R98) 1.50 33335 Transformer -"1st pix P2" (L25) or "2nd pix

33210 Control -20 ohm tapped "Vertical centering" P2" (L30) I -F transformer (brown and blue) 1.85 control (R114) 1.50 33338 Transformer -"1st sound" I -F transformer (L45,

33209 Control -5,600 ohm, "Vertical linearity" control L46) (orange and red) (Used in early produc- (R11S) 1.00 tion) 2.40

35568 Control -50,000 ohm "Brightness' and 4,000 33526 Transformer -"let sound" I -F transformer (L45, ohm "Contrast" dual control 2.00 L46) (red and white) (Used in late produc-

33207 Control -560,000 ohm "Width(' control (R94) 1.00 tion) 2.50

33516 Transformer -"Ind pis Pl" i -N ra,tstormer 33337 Transformer -"5th pia" I -F transformer (L37, (L26, L27, L28, L29) (orange and orange). 2.60 LS8) (brown and white) 1.80

33339 Transformer -"2nd sound" I -F transformer 32899 Transformer -Horizontal oscillation transformer (L47, L48) (orange and orange)..... 2.60 (T1) 1.75

33333 Transformer -"3rd pis" I -F transformer (1.;31.,9862 Transformer -Horizontal output transformer (T2) 17.50 L32, L33) (orange and blue) 2.40 32900 Transformer -Vertical output transformer (T4). 5.50

33336 Transformer "4th pis" I -F transformer (L34, 32898 Transformer -Vertical oscillation transformer L35, L36) (brown and black) 2.00 (T3) 1.75



60 RCA MODELS TRK- 90, TRK- 120 RCA MFG. CO., INC.


UnitList

Price STOCK

No. DESCRIPTION Unit List Price

3 -BAND RADIO RECEIVER CHASSIS RC -427F in TRK-120 (60 cycle) RC -427F in TRK-120 (50 cycle)

13698 12199

R20, R32, R31) 20 Resistor -1E0,000 ohms, 4. watt (R17) 20 Resistor -270,000 ohms, 1.watt (R15, R33, .

31863

RC -427G in TRK-90 (80 cycle)

Board-Antenna-ground terminal board .20 18020 12486

R34) S0 Resistor -470,000 ohms, 1 watt (R24) 22 Resistor -560,000 ohms, } watt (R21) 20 32232 Body-Station setting contact body and spring. .15 12013 _ Resistor -1 meg., 1/10 watt (R8) 15

32090 32635

Bracket-Motor mounting bracket Cable drive 60

40

24

13730 12679 31548

Resistor -1 meg., 1 watt (141, R2, R19) 20 Resistor -2.2 meg., } watt (R9) 20 Resistor-Voltage divider consisting of one 1,500,

--Indicator pointer cable - -in. length

14392 31353 31270

Capacitor -4.7 mmfd. (C46) Capacitor -15 mmfd. (C6) Capacitor -100 mmfd. (C41, C42)

.35

.40 35 14887

one 2;950, one 3,400, one 30 and one 3,165 ohm section (R25, R28, R27, R28, R29).... .90

Retainer-Drive cord pulley retainer 01 12720 Capacitor -100 mmfd. (C38, C16) 35 32086 Roller-Rubber friction roller for front end of 12724 Capacitor -120 mmfd. (C12, C21) 35 motor shaft 10 13003 Capacitor -180 mmfd. (C3, C17) 35 31233 Rotor-Station selector rotor disc-mounts on 12952 Capacitor -330 mmfd. (C39) 35 rear of variable condenser shaft 1 16 31433 Capacitor -580 mmfd. (C8) 35 5042 Screw-No. 8-32 set screw for drive pulley.... .03 31552 Capacitor -680 mmfd. (C19, C20, C23, C24) .. .40 14350 Screw-No. 8-32 square head set screw for rotor 32197 Capacitor -3,900 mmfd., 500 volts (C7) 55 disc, Stock No. 31233 03 31405

5107

33584 11315

4870 32787

4839

12484

12741 18530 32088

31263 31265 31296 31980

31783 31234

12714 31292

31971

31972

Capacitor -6,000 mmfd., 500 volts (C10) 75 Capacitor-.0025 mfd., 700 volts (C35, C36,

C55) .20 Capacitor-.005 mfd., 1,200 volts (C53) 25 Capacitor-.015 mfd., 400 volts (C31) 20 Capacitor-.025 mfd., 400 volts (C32, C50)... .20 Capacitor-.05 mfd., 400 volts (C27, C25).... .20 Capacitor -0.1 mfd., 400 volts (C22, C18, C26,

C34, C52) .30 Capacitor-.25 mfd., 350 volts (C13, C28, C48,

C45, C51) .30 Capacitor -0.5 mfd., 150 volts (C47) 30 Capacitor -20-20 mfd., 350 volts (C33, C49).. 2.00 Capacitor-Motor capacitor 60 mfd., 40 volts

(C30) 90 Coil-"A" band antenna coil (L1, L2) 95 Coil-"A" band detector coil (L6, L7) 1 20 Coil-"A" band oscillator coil (L10) 105 Coil-"B" and "C" band antenna coil (LS, L4,

L5) 80 Coil-"B" and "C" band oscillator coil (L8, L9) 1.05 Condenser -3 -gang variable condenser (C1, C11,

C14, C2, C15) 8 45 Condenser-Air trimmer condenser (C9) 50 Condenser-Double section trimmer capacitor 3-30

mmfd., each section (C4, C5) 40 Contact-Push button switch contacts comprising

11 contacts riveted on insulating strip 65 Contact-Push button switch contacts comprising

14 contacts riveted on insulating strip 1 25

3.1681 31364 31251

14278

31279 13638 31970 31232 12007 31418

33447

31979 31968

31565

31551

31549

32231

32094

Shaft-Dial drive knob shaft 20 Socket-Dial or electric tuning set-up lamp socket .20 Socket-Octal type Radiotron or power supply socket 45

Socket-Pin socket for phono or television input with mounting plate, (X16) (X17) .25 Spring-Band indicator tension spring .03

Spring-Indicator drive cord tension spring.... .08. Spring-Push button switch lock bar spring... .05 Spring-Station setting tip spring .01 Spring-Stud retaining spring for I -F adjuster.' .02 Spring-Variable condenser drive cord tension

spring .05 Switch-H. F. tone 'control phono -radio -television and power switch (84, S5, S6, S7, S12).... 2.65

Switch-Range switch (Si. S2, S3) 1.55 Switch-Station selector push button switch complete 3.95

Transformer-Ist I -F transformer complete (L11, L12, C19, C20, L19) 2.40

Transformer -2nd I -F transformer complete (L13. L14. C23, C24, L20) 2.40

Transformer -3rd I -F transformer complete (L15, L16, C41, C42) 2.10

Washers-Comprising one metal washer, two fibre washers and one solder lug or retainer for station setting body .03

Washers-Assorted washers for mounting damper on motor shaft .10

31231 33446

Contact-Station setting contact tip 08 Control-"Power-volume control" - 1} meg. ' 'POWER SUPPLY UNIT

(R12. S10, S11) 2 00 TELEVISION AUDIO RECEIVER 32634 Cord-Band indicator and variable condenser drive RS -83E in TRK-120 (60 cycle)

cord 10 RS -83E in TRK-120 (50 cycle) 31269 Core-Core and stud for 1st, 2nd, or 3rd I -F RS -83E in TRK-90 (80 cycle)

transformer 15 32093 Damper-Flywheel for rear end of motor shaft.. .25 14531 Capacitor -25 mfi. filter capacitor (Cl) 1.55 32096 Disc-Friction disc and pinion gear 35 33606 Plug -8 -contact male plug for power supply cable 32091 Drive-Friction drive gear assembly 150 (X20) - .45 31273 Drum-Variable condenser drive drum 70 31251 Socket-5U4G Radiotron socket .25 31239 Gear-Knob shaft drive gear and hub 85 33445 Transformer -110 V. 60 cycle power transformer 31532 Indicator-Band indicating strip (Model TRK-12 (Ti) . , . 10.30

only) 15 31304 Indicator-Band indicating strip (Model TRK-9 7,500 VOLT TELEVISION POWER,

only) 15 UNIT 31480 Lamp -6.3 volt electric tuning set-up lamp Mazda Kk-7F in TRK-120 (60 cycle)

No. 47 20 KK -7J in TRK-120 (50 cycle) 11891 31969

Lamp -6.3 volt dial lamp Mazda No. 44 .17 Lockplate-Push button switch lockplate compris- KK -7H in TRK-90 (60 cycle)

ing 10 contact locks in 1 strip 75 33016 Bushing-Porcelain bushing and spring Cable-Insulated 32095 Motor-Electric tuning drive motor complete 33288

.25 connector complete with cable

for Kinescope (2nd anode) (M1) 525 2.10 31228 Plate-Station selector contact plate - less 30036 Capacitor-.005-.005 mfd., 1,000 v. (C115,

plungers 45 C116) 1.16 31227 Plate-Station selector mounting plate-mounts 33018 Capacitor -0.03 mfd., 7,500 volt (C113, C114) 3.75

on rear of variable condenser 50 34331 Capacitor -0.1 mfd., 7,500 volt (C121, C122) 12493 Plug-Female connector for speaker cable (X9). .30 (Used in 50 cycle model only) 7.50 31271 Pulley-Drive pulley fastens on station selector 18388 Capacitor -0.25 mfd., 600 volt (C128) .35

knob shaft 25 32400 Capacitor -20 mfd., 450 volt (C111, C112) 1.05 31280 Pulley-Indicator pointer drive cord pulley. .10 33023

.. Capacitor -80-10 mfd., 400 volt (C109, C110,

31272 Pulley-Range switch pulley 20 C118, C119) 2.80 14720 Resistor -1,000 ohms, } watt (R7) 20 14854 Choke-Filter choke (L49) 1.80 12267 Resistor -1,200 ohms, } watt (R6) 20 32940 Choke-Filter choke (L50) (Used in TRK-120, 12312 Resistor -3,300 ohms, } wait (R5) 20 50 cycle only) 3.75 14559 Resistor -10,000 ohms, } watt (R10) 20 35887 Choke-Filter choke (L50) (Used in TRK-90 12695 Resistor -15,000 ohms, } watt (R14) 20 and TRK-120, 60 cycle only) XX 12738 Resistor -27,000 ohms, } watt (R13) .20 30314 Clip-Plate connector for 2V3G Radiotron.'... .03 12454 Resistor -33,000 ohms, 3 watt (R3, R4) 20 3037 Control-Focus control, 400,000 ohms (R129) 12266 Resistor -39,000 ohms, } watt (R23) 20 (Used in TRK-90 only) 1.00 12286 Resistor -56,000 ohms, } watt (R30) 20 33971 Control-Focus control, 400,000 ohms (R129) 14560 Resistor -100,Q00 ohms, } watt (R11, R16, (Used in TRK-120 only) 1.00

33002 Coupling-Flexible bronze coupling .10


RCA PAGE 13-61

MODEL; TRK-90, TRK-120

RCA MFG. CO., INC.

10907 34527 33015

32937

Fuse -3. ampere, 250 volt :08 Fuse -1 ampere glass type fuse .18 Insulator-Stand-off insulator only - less hard-

ware .30 Knob-Focus control knob .20


Unit List

Price 33244

33166

35897 33501

33502

Plug -2 -prong male connector for A.C. power cord (X22) .45

Plug -2 -prong male plug for Kinescope grid - cathode cable (X4) .............. .20

Resistor -60 ohms, 10 watt (R165) 30 Resistor -330,000 ohms, 1W (1.000V.) (R126,

R130) .20 Resistor -470,001 ohms, 1W (1,000}7.) (R127,

33363

31456

32$15

33019

Connector -2 -prong female connector, used on interlock cable (X21)

Cover-Eight protective covers for push button markers .

Cushion-Kinescope masking cushion (Model TRK-120 only)

Cushion-Kinescope masking cushion (Model TRK-90 only)

145

08

2 30

190 R137, R166) .20 33643 Cushion-Television chassis mounting cushion 33593 Resistor -560,000 ohms, 1 watt (1,000V.) with screw, spacer and washer (sufficient for

33554. (R128) .20

Resistor -820,000 ohms, 1W (1,000V.) (R131, 35894 one chassis)

Decalcomania-"1-2-3-4-5" decal 40 10

33024 18007

R132, R133, R134, R135, R136) .20 Shaft-Bakelite shaft for focus control .50 Socket-Ceramic octal base socket and retaining

35890 35893 35891

Decalcomania-"Contrast-Brightness" decal.... Decalcomania-".Fine Tuning" decal Decalcomania-"Horizontal and Vertical Holding"

.05 05

33245 31251

ring for high voltage rectifier .65 Socket-Kinescope socket, less cable (X11) .35 Socket-Octal base 5T4 rectifier, or television

decal 35896 Decalcomania-"Power-Volume, tone, tuning,

range" decal

05

20

12143 power supply socket (X13) .25

Socket -6 -prong television power supply socket 35392 35892

Decalcomania-"RCA Victbr" decal Decalcomania-"Station selector' decal

05 05 (X15) .50 35895 Decalcomania-"Victrola-Radio-Television' decal .10 32909 Support-Rectifier socket, plate, and stand-off in- 33442 Dial-Three-band glass dial scale 125 sulator assembly..... 2.00 35889 Escutcheon-Dial escutcheon less buttons, button 32939 Transformer-Filament power transformer (T7), shaft and dial scale 2 60

105-125 volts, 60 cycle (Used in TRK-90, 32083 Frame-Dial frame with screen less pointer, car- TRK-120, 60 cycles and TRK-120 50 cycles) 5.65 riage and rod

32938 Transformer-Low voltage power transformer 33074 Glass -61 by 81 inch safety protective glass ,1.20

(T5), 105-125 volt, 60 cycle (Used in. TRK- (Model TRK-90 only) 2 40 90 and TRK-120, 60 cycles only) 10.00 33076 Glass -8i by 11k inch safety protective glass 34302 Transformer-Low voltage power transformer (Model TRK-120 only) 3 90 (T5), 105-125 volts, 50 cycle (Used in TRK- 33282 Hinge-Piano type lid hinge and 'crews 2 50 120, 50 cycle only) 10.00 33468 Knob-Radio tuning, volume or range selector

9861 Transformer-High voltage power transtormer knob 15 (T6), 105-125 volts, 60 cycle (Used in TRK- '33470 Knob-Television "Contrast," "Hor. hold" or 90 and TRK-120, 60 cycle only) 22.50 "Fine Tuning" knob 20

35888 Transformer-High voltage power transformer 33471 Knob-Television "Brightness" or "Vert. hold" (T6), 105-125 volts, 50 cycle (Used in TRK- knob 25 120, 50 cycle only) XX 33472 Knob-Television "Station selector" knob 25

33469 Knob-"Victrola-Radio-Television-Fidelity selec- tion" knob 20

11891 Lamp -6.3 V. pilot lamp, Mazda No. 44 17 31589 Marker-Complete set of call letter markers.... .35 31458 Marker-"Dial Tuning" push button marker... .01

SPEAKER ASSEMBLY 31457 Marker-"Victrola" push button marker 01 RL -70F-5 33075 Mirror -20} by 141 in. viewing mirror 9.00

33225 Nut-Speed nut for mounting high frequency 31825 Cap-Cone center dust cap .02 coil assemblies 01 11469 Coil-Hum neutralizing coil (L21) .30 4577 Plug -2 -prong male plug for power supply cir- 11234 Coil-Speaker field coil (L17) 3.85 cuit (X24) 45 31275 Cone-Speaker cone assembly (L18) 1.50 33244 Plug -2 -prong male plug, used on interlock 31567 Plug -3 -prong male feed back cable plug (X8). .15 cable (X22) .45 31539 Plug -5 -prong speaker plug (X10) .25 33166 Plug -2 -prong male plug for Kinescope grid - 31556 Speaker-Speaker complete (RL -70F-5) 13.45 cathode cable (X4) 20 31557 Transformer-Speaker output transformer (Ti). 3.20 32816 Plug -4 -prong male plug for deflecting yoke

cable (X2) .20 12493 Plug -5 -prong female speaker cable plug (X9). .30

4574 Plug -6 -prong male plug for Television chassis power supply cable (X14) 48

MISCELLANEOUS ASSEMBLIES 16836 Plug -8 -prong male plug for Television chassis TRK-120 power supply cable (X12) 25 TRK-90 31542 Pointer-Station selector pointer with carriage.. .35

31287 Rod-Dial frame pointer slide rod 15 31358 Button-Station selector push button. .15 32083 Screen-Dial frame diffusing screen with rivets. 1.20 33676 Cable -17}' -inch shielded audio lead with plugs 4560 Screw -1-20 by 11. in. long, machine screw,

33480 (X6, X18) (Model TRK-9 only) .85

Cable -38 -inch shielded audio lead with plugs (Model TRK-12 only) (X6, X18) 1.30 33517

washer and lockwasher for chassis mounting (12 required)

Sleeve-Bell mouth sleeve for screw -driver ad- 06

34600. Cable-Kinescope cable and socket (TRK-120 only) 2.50 14270

justments (Model TRK-90 only) Spring-Knob spring for Stock Nos. 33468,

05

34601 Cable-Kinescope cable and socket (TRK-90 only) 3.25 30330

33471, 33472, 33469 knobs Spring-Knob spring for Stock Nos. 33470,

05

33246

33605

33597 32897

Cable-, Low capacity Kinescope grid cable (Model TRK-120 only) 1.25

Cable-Low capacity Kinescope grid cable (Model TRK-90 only) 1.35

Cap-Blue pilot lamp "Bulls Eye" .20 Clamp-Deflecting yoke clamp assertrbly .65

33384 31522 31478

9857

knob Switch-Interlock switch and cover Support-Left hand lid support Support-Right hand lid support Yoke-Deflecting yoke complete with cable and

4 -prong plug (L43, L44, R62) 17

03 55

2 25 2 20

50 4573 Connector -2 -prong female connector for power

supply circuit (X23) .30

XX-Price upon application to your RCA Parts Distributor.



62 RCA MODEL R-91 Phono.

RCA MFG. CO., INC.

General Description and Service Data The model R-91 Electric Victrola consists of a crystal pickup,

a four tube audio amplifier, a five -inch dust -proof dynamic speaker, and a motor turntable mechanism all combined in a hinged -top, table type walnut veneer cabinet. Any record, up to and including the 12 -inch size, may be played on this instrument.

The crystal pickup unit is securely sealed in a metal casing, against extreme changes of climate. If failure occurs due to a defective crystal unit, no attempt should be made to repair it, but a new replacement crystal unit should be installed.

Phonograph Motor The synchronous motor used in this instrument is designed to be

simple and foolproof. The parts that may require attention are plainly shown in figure 2. The motor' is started by turning "on" the power switch and giving the turntable a clockwise spin with the hand. Smooth starting and running will be insured by keeping the bearings well cleaned and oiled.

Hum and Vibration.-A small amount of hum when starting, decreasing to a negligible amount when running, is normal. If excessive vibration occurs it may be due to:

1. Insufficient lubrication, or any failure that will cause binding. 2. Leather washer not oiled. (Check to make certain that the

leather washer is above the steel washer.) 3. Motor not properly supported from motor board. 4. Burrs on poles of rotor or stator. Remove with fine emery

cloth. 5. Stator should be free to rotate between limits of damping

assembly. Removing Rotor.-The rotor and turntable assembly simply rests

on the ball bearing at bottom of vertical bearing. Remove by lifting upward.

Rotor Adjustment.-Remove motor from cabinet. Loosen the three screws that hold the rotor to the turntable, insert three 16 -mil shims at equal distances around the gap between the rotor and stator, and then carefully tighten the three screws. The top of rotor must be flush with top of stator; add additional steel washers beneath the stator if necessary.

Pilot Lamp.-To replace pilot lamp, remove the screws from the small raised block at the front of the motor board, and remove the wooden block. The pilot lamp compartment is then accessible.

POWER SWITCH TONE CONTROL

'11111:111111111

Bñ

MIR VOLUME CONTROL

BK616 POWER OUTPUT

RECTIFIER

CD CD 6F5

BALLAST TUBE

POWER SUPPLY RATING A-5 105-125 volts, 50 cycles, 65 watts A-6 105-125 volts, 60 cycles, 65 watts POWER OUTPUT Undistorted 1.5 watts Maximum - 2.0 watts LOUDSPEAKER Type Electrodynamic Voice Coil Impedance 4.9 ohms at 400 cycles

Moron BOARD Motor Manual Starting Synchronous Turntable Speed 78 r.p.m.

PICKUP Type Crystal Impedance . 80,000 ohms at 1,000 cycles

LEATHER WASHER SHOULD BE OIL SOARED, DOES ABOVE STEEL WASHER.

6F5 AUDIO

OIL BALL BERRI NG USE LIGHT OIL

TURNTABLE HELD ON SHAFT BY RETAINING RINGE WASHER

AIR GAP SS .DIS r.000TE GA MUST BE UNIFORM.

OIL OUTER BEARING SURFACEUSE LIDHT OIL.

0 L INNER SEARING SURFACE:, USE LIGHT OIL.

Figure t-Motor Details

25L6 cs OUTPUT ns MED

PICK-UP

WV -115.0' VV MOTOR

IME4 MCD

/'IT'r1 VOLUME CHASSIS cONTROL

RI > I M[S

COMR'T LAMO

DEG

SLS

BALLAST RESISTOR

RT MAN. ensCOL

D

BK GIB

HEATERs

VOLTAGE AMPLIFIER

Figure 3-Tube Layout -.UC Hunan" o/ each coJ

Iw 110 vols o U oh*e

.2-

1-Motor Coil and Pickup Wiring

Figure 5 Wiring and Socket Voltages

NOTE: Values with star (A) are operating voltages in circuits with high series -resistance, and when measured will read lower depending on the voltmeter loading.

Measurements made to chassis uniess otherwise indicated, volume control at minimum. Values should hold within approximately ± 20% with 117 -volt a -c supply.

DIDAIN-- RLACE

CANA PLW--

l

R6

C2 .005 MED.

RS 2Tq000R

1

2526 RECT. º4

C7 40 MEO.

ISO n

CIELO ce

40 MEO

/ON TONE ) \ oNTR

-BROWN

SPEAKER CONNECT6N3

Figure 4 Schematic Diagram

52 TONE CONTROL

SWITCH

025 MCD

N MUM colt_

c4

U51í1

V. C. L2

Z=.

CATHODE CURRENTS

(1)6F5 0.2 INA

(2)25L6 50MA (3) 2526 53MA* *TOTAL RECTIFIED CURRENT

BOTTOM VIEW- REAR OF CHASSIS

C4

H-NJVC-o


RCA PAGE 13-63

MODELS R-93B,R-93C RCA MFG. CO., INC. Phono

General Description These instruments employ a crystal pickup unit which depends upon torsional vibration to provide the necessary output

voltage. The crystal unit is contained in a metal case, securely sealed against extremes of climate. An offset mounting for the pickup head gives an ideal tracking angle between the needle and record grooves.

The motor Is a manual starting, synchronous type, designed to operate with good regularity of speed at the standard 78.26 r.p.m. Mechanically, the motor consists of a laminated stator having a large number of salient poles; a laminated rotor with a corresponding number of poles, which is affixed to the turntable; and two field coils, installed on the stator to furnish the energizing magnetic flux. The rotor, stator, and their bearing assembly are mechanically isolated from the turntable, motor mounting, and cabinet by adequate flexible couplings and supports.

A volume control unit is associated with the record player, and its output is terminated in a twisted -pair cord with a pin -plug connector.

The two models are electrically and mechanically similar; they differ in that Model R -93B has a molded plastic cabinet, whereas Model R -93C has a veneer wood cabinet.

VOLTAGE RATINGS MOTOR AND PICKUP

A-6 105-125 volts, 60 cycles, 9 watts Type of Motor Synchronous (Manual Starting)

Y Turntable Speed 7.8 r.p.m.

A-5 105.125 volts, 50 cycles, 9 watts Type Pickup Crystal Pickup Impedance 80,000 ohms at 1,000 cycles

B-2 105.125 volts, 25 cycles, 9 watts Average Output Voltage. 1i/2 volts at 1,000 cycles with 250,000 ohm load

C-5 200-250 volts, 50 cycles, 9 watts Volume Control Resistance 250,000 ohms

RCA VICTOR RECEIVERS -DETAILS OF LEAD CONNECTIONS

MODEL METHOD OF CONNECTION GREEN YELLOW RED BLUE SHIELD SWITCH

5BT, 5T, 5T1, 6T4, 5T5, 5T6, 5T7, 5T8, 6K, 61(1, 6T, 6T5, BBK, 8BK6, BBT, 8BT6, 8K11, 8T2, 8T11 85T5, 86X4, 86T, 86T4, 86T44, 86BK, 86BT, 85BK, 85BT

Term. Board 1 2 Tape Tape 3 f

6BK, 6BK6, 6BT, 6BT6 Term. Board 1 2 Tape Tape 3 t t 7K, 7T, 7X, 7X1, 8K, 8K1, 8T, 81'10, 87K1, 88K, 812X, 810T4, 813K, 816K, 811K, 87EY, 87X, 87Y, 810T, 810K, 812K

Term. Board 1 2 Tape Tape 3 t

6K2, 6K3, 6K10, 6T2, 6T10, 7K1, 7X1, 86T3, 87T1,

Term. Board 2 1 Tape Tape 3 T

Tg -7, T9-8 Term. Board 2 3 Tape Tape 1 t

9K, 9K1, 9K2, 9K3, 9K10, 9T, 10K, 10K1, 10K11, l0T, 10T11, 13K, 16K

Term. Board 2 1 4 3 3 t t

C6-12, C7-14, C8-19, C8-20, T6-11, T7-12, T8-18, T9-10

Grid Clip Grid Cap Tube

Grid Clip Tape Tape Chassis t

C11-3, C13-3, C15-4 Adapter 1st Audio Cathode

Cathode Socket Contact

I -F Cathode *

I -F Cathode Socket Contact

Chassis t t

C6-8, T6-7 Adapter Grid Cap Tube

Grid Clip Tape Tape Both Adapter Cathode Terms.

t

85E Wired On R5 § R69=46 º2,000 4) 'Tape Tape Chassis t

85BT6 Wired On R5 § Junction of jR10&-R14

2 Ow

Tape Tape Chassis t

86X Wired On R5 § R11 2.2meg Tape Tape Chassis t 85T1 Wired On R5 § Junction of

R16 & R11 22,uoa m - Z. 2.nr

Tape i,

Tape Chassis t

851' Wired On R5 § 2

mR22 Tape Tape Chassis t

t Add Jumpers Jl and J2 to Phono -Radio Switch if not present. t t Remove Jumpers J1 and J2 to Phono -Radio Switch if present.

§ Open circuit between R5and other resistors named, and wire -in cable as instructed. See Figure 4.

* Use a second adapter. a Rs in 'ere volurq¢ coptrol.


64 RCA MODELS R-93B,R-93C

RCA MFG. CO., INC.

CONNECTING RECORD PLAYER TO RADIO RE- CEIVER-In connecting this player to the radio, care must be exercised to connect it at a point where sufficient gain is between it and the speaker to give normal output. Usually two or more stages of audio amplification are required. The radio part must be thoroughly disconnected or "killed" when playing records, else the radio signals will be heard with the record's music. Attention should be given to the possibility of introducing hum and feedback voltage into the

CABLE TO RADIO CNABSIJ

MOTOR DROWN FOR IIO VOLT- 60 C VC LE CONNECTION

Figure 1-Wiring Diagram

radio when connecting the player. A radio -phonograph switch, Stock No. 9824 is recommended for a switching system. Its connections are shown in Figure 1. With it, radio or phonograph may be selected by simply turning the switch.

BOTTOM VIEW OF

STATOR

RED YELLOW

IO VOLTS- 6OCYCLES a2O VOLTS -50 CYCLES

IO VOLTS- SO CYCLES

Figure 3-Motor Coil Assembly and Connections

When the radio is equipped with a phonograph terminal board, the player is easily connected. One should follow the instructions pertaining to that particular radio. In general, the player's output should be applied to the grid circuit of the first audio tube in the same manner as the second detector is connected. Use a switching arrangement that grounds the radio as it connects the phonograph.

When using the radio phonograph switch Stock No. 9824 on radios using a 6B'7 or some similar tube for second detector, the yellow and green leads are connected in series with the grid cap connections of this tube. The green lead is connected to the grid cap.

RECORD PLAYER SWITCH JUMPERS-Some record player switches do not have jumpers J1 and J2 attached. When the switch is so connected and turned to phonograph position, the voltage developed by the pickup is fed into the radio receiver through the green wire and shield, and at the same time the yellow wire is connected to shield. The jumpers J1 and J2 permit the yellow lead to kill radio by connection to shield. The jumpers should be removed where the yellow lead connects in such a position as to shord bias batteries, etc. Check the switch to be used for the method chosen and use the jumpers accordingly.

FROM SECOND DETECTOR i

O J W r

VOLUME CONTROL

REAR VIEW

.Ch ARM Ge

u

Z W W

O

0 Iv

d

?t,

I

0 J _W

2

CABLE FROM RADIO PHONOGRAPH SWITCH

TO AUDIO AMPLIFIER

©RCA MFG. CO.,INC. SN- 803-0

Figure 4-Typical Connections to Radio Receiver Volume Control

STOC DESCRIPTION Unit List

Price STOCKNo DESCRIPTION

Unit List

Price

MOTOR ASSEMBLIES Base-Motor damper, bearing

31039 Turntable-Finished turntable top plate only- less rubber mountings .95

31045 4083 Washer-Leather washer .02 support, and cup assembly .60 14231 Washer-Metal spacing washer .02

31046 Bearing-Bearing assembly .70 31041 Cap-Rubber spindle cap .05 31047 Cushion-Rubber cushion for bearing .15 PICKUP AND ARM ASSEMBLIES 31035 Motor -110 volt, 25 cycle-less mounting (M1) 9.50 31034 Motor -110 volt, 50 cycle-less mounting (M1) 8.90 31049 Base-Pickup arm pivot shaft and base assembly .65

9841 Motor -110 volt, 60 cycle-complete with mounting (M1) 6.50

31050 9842

Crystal-Pickup crystal and needle screw Pickup crystal and arm complete with mounting

3.75 4.95

31040 Mountings-Turntable top rubber mountings 12539 Screw-Pickup needle screw .22

sufficient for one turntable .25 31038 Rotor-Turntable and rotor lamination assembly MISCELLANEOUS ASSEMBLIES

31037 complete for 25 cycle operation

Rotor-Turntable and rotor lamination assembly 4.55

31055 Cabinet-Model R -93B cabinet with bottom complete for 50 cycle operation 4.55 cover-less rubber feet 2.05

31036 Rotor-Turntable and rotor lamination assembly complete for 60 cycle operation 4.55

31051 3961

Foot-Rubber foot for cabinet Knob-Volume control knob

.04

.10 31044 Stator-Stator assembly complete with coils and 31054 Mounting-Pickup arm mounting nuts, washer,

laminations for 25 cycle operation 3.10 and rubberspacer .15 31043 Stator-Stator assembly complete with coils and

laminations for 50 cycle operation 2.50 31053 Mounting-Motor mounting screw assembly

complete .30 31042 Stator-Stator assembly comprising coils and

laminations for 60 cycle operation 2.50 31048 31052

Plug -2 -contact male plug for output cable... Volume Control and on -off switch (Rl, Si)...

.15 1.50



RCA PAGE 13-65

MOTOR 78 r.p.m. POWER SUPPLY RATINGS 105-125 volts, 60 cycles 105-125 volts, 50 cycles 105-125 volts, 25 cycles

TURNTABLE HELD ON SHAFT BY RETAINING RING AND WASH E'....jtGAP MUST BE UNIFORM

LEATHER WASHER SHOULD BE OIL SOAKED - GOES ABOYÉ STEEL WASHER

OIL BALL BEARING USE LIGHT OIL

o1.,.,EW

,2:T..

AIR GAP IS .016"

LUBRICATE OUTER AND

INNER BEARING SURFACE

WITH LIGHT OIL

ROTOR CENTERING CALIPERS A special calipers (Stock No. 36950) is now

available for quickly and accurately centering the rotor in these motors.

Exact centering is essential for minimum hum and "wow." The precision of manufacture of these calipers provides checking and centering with an accuracy of .0005 inch.

RCA MFG. CO., INC.

Electrical and Mechanical Specifications CRYSTAL PICKUP

Synchronous ( Manual Starting)

10 watts 10 watts 10 watts

Impedance Average Output Voltage

MODEL R -93F Phono. 2nd Edition

100,000 ohms at 1,000 cycles 11 volts, at 1,000 cycles

Across 250,000 ohms load Cabinet Dimensions 3 x 9¡ x 112 inches Weight 61 lbs. (net), 81 lbs. (shipping)

At Left-Fig. I

At Right-Fig. 2

Lower Left-Motor Coil Connections

Lower Right- R-93F Schematic

Diagram

Rotor Centering Calipers

Motor Data Smooth starting and running will be insured by keeping the

bearings well cleaned and oiled. Hum and Vibration-A small amount of hum when starting,

decreasing to a negligible amount when running, is normal. If excessive vibration occurs, it may be due to: 1. Insufficient lubrication, or any failure that will cause binding. 2. Leather washer not oiled. (Check to make sure that the leather

and steel washers are arranged in proper sequence, as shown in the drawings.)

3. Motor not properly fastened in cabinet. 4. Burrs on poles of motor or stator. 5. Slight eccentricity of rotor or spindle. 6. Loose laminations of the stator. 7. Improper horizontal alignment of the rotor and stator (per-

taining only to the type motor shown in Figure 1). Correct

A6960-0

ROTOR ml stnnia:

LEAT STEEL iwSHER ¡ STEEL

EWHINERR STEEL WASHER

LEATHER WASHER SHOULD 6e OIL SOAKED GOES DETWEEN STEEL WASHERS

LUDRICATE INNER SEARING WITH LIGHT OIL

51

C

PICKUP

TIURNTADLE HELD ON SHAFT ET

RETAINING RING d HASHER

AIR GAP IS OIS = OW MUST

ISE UNIFORM

DRICATE OUTER SEARING WITH LIGHT GREASE

VOL CONTROL efflooA

K-90602

To use the calipers, lift out the turntable and rotor, slide the caliper onto the rotor shaft, and adjust the calipers to fit the internal radius of the rotor. Rotate the calipers and check for run out, or widening of the radius. Tap the edge of the rotor to move it in the desired direction. Recheck and tap as necessary until rotation of

the calipers indicates accurate centering.

horizontal alignment is as shown in the motor assembly drawing. The position of the stator is raised or lowered by adding or removing washers below the leather washer. In the type motor shown in Figure 2, no adjustment is necessary because correct horizontal alignment is provided by the design of the motor.

The damper spring must fit without binding or chattering, in the slot in the stator. The stator must be free to deflect in either direction between the limits of the damper spring. Any binding in the washers or stator bearing which prevents the movement of the stator may cause speed variations in the motor. The damper spring must exert equal force in restoring the stator to its mid -position when the stator is deflected manually in either direction.

Tone Compensation Because of the widely varying frequency characteristics of various

types of audio amplifiers with which the Player may be used, it may be desirable in some cases to make refinements in the pickup circuit of the Player to compensate for the characteristics of the amplifier. The following circuits show means of making such refinements.

In Figure 3, R1 controls the low -frequency response; larger values of R1 give increased lows: For maximum low -frequency response, remove R1. R2 controls pickup output, smaller values of R2 giving increased output. Cl controls high -frequency response; to increase highs, increase Cl.

C1 -82MME

CRYSTAL PICKUP

Where a decrease in high -frequency response may be desired (for example, as an aid in reducing "needle scratch" on worn records), the circuit in Figure 4 is applicable. In this circuit, C2 acts as loading on the pickup and is also a controlling factor on the high - frequency response. Smaller values of C2 give more pickup output and also more highs. R3 gives a sharper high -frequency reduction; increasing R3 decreases highs.

The suggested values shown in Figures 3 and 4 should serve as a basis from which slight alterations may be made to suit individual cases.

R3-22,00011

C2 CRYSTAL 2700

PICKUP MMF.

180,00011 VOL.

CONTROL


66 RCA MODEL R-93FPhono 2nd Edition

Connecting

RCA MFG. CO., INC.

Record Player to Radio Receivers

This Record Player consists of a motor -turntable mech anism, a crystal pickup unit and a volume control with motor switch. The player may be connected to the audio amplifier system of practically any type of radio receiver for the reproduction of records.

For convenience in connecting the player to receivers with out the conventional phono -jack, a new type switch (Stock No. 9824-A) is recommended.

This switch may be used for quickly connecting Record - Players, Television Attachments, Frequency -Modulation At- tachments, Microphones, and similar devices into the audio amplifier of the receiver.

The great majority of receivers in use have a grid -cap type

Stock No. 9824-A Record -Player Switch

1st -audio tube, and the new switch is designed for rapid connection to the grid cap, without removing the chassis from the cabinet. On other receivers, the switch can be readily installed by means of socket adapters or connection into the audio circuit.

The new switch is designed to provide:

1. Changeover from radio to record player, with retention of the original tone quality, and without introducing hum.

2. Suppression of radio on the "phono" position.

3. Maintenance of all original bias conditions in the radio circuit.

Complete instructions are furnished with the switch.

A í®

'RADIO"

lUI

PHONO"

Lj PHONO _ JACK

SHIELDED CABLE

9824 A SWITCH

4/

BLACK CABLE FROM 9824A SW.

SHIELD EX T.

GRID CAP BLACK-

BROwN

FIRST AUDIO TUBE 1

A typical hook-up as used on receivers with a grid -cap 1st -audio tube. (On a.c.-d.c. sets, a .25 mf d. condenser should be connected in the cable shield lead.)

Methods of connecting receivers (without the grid -cap 1st -audio tube) thru the use of adapters, etc. are explained in detail in the instructions packed with each switch.

Replacement Parts Insist on genuine factory -tested parts, which are readily identified and may be purchased from authorized dealen.

STOCK No.

DESCRIPTION Unit List

Price STOCK

No. DESCRIPTION

Unit List

Price

MOTOR ASSEMBLIES (See Figure 1) 33346 Coil -Motor field coil .65 (110 volts, 25 cycle) 33350 Frame -Motor mounting frame and bearing cup (110 volts, 50 cycle) assembled

Frame frame, lami- .45

31045 Base -Motor support, damper, and bearing cup 33344 -Rotor spindle shaft and nations assembly .60 2.45

31046 Bearing -Bearing assembly .70 34480 Hanger -Rubber hanger for mounting motor... .10 31041 Cap -Rubber spindle cap .05 34479 Lamination -Stator laminations and bearing 31047 Cushion -Rubber cushion for bearing .15 assembled -

1.30 32077 Motor -110 volt, 25 cycle -less mounting 14.60 33041 Ring -Retaining ring for turntable .06 31034 Motor -110 volt, 50 cycle -less mounting.... 8.90 31039 Turntable .95 31040 Mountings -Turntable top rubber mountings PICKUP AND ARM ASSEMBLIES

sufficient for one turntable .25 32073 Rotor -Turntable and rotor lamination assembly ,33591 Arm -Pickup arm only -less cartridge, base and

complete for 25 cycle operation 7.70 cable .50

31037 Rotor -Turntable and rotor lamination assembly 34481 Arm -Pickup pivot arm and shaft .70

complete for 50 cycle operation 4.55 34482 Base -Pickup mounting base .30

32072 Stator -Stator coil, laminations, and weights for 33122 Crystal -Pickup crystal cartridge and needle 105-120 volts, 25 cycles 5.00 screw 3.75

31043 Stator -Stator assembly complete with coils and 33123 Damper-Viscoloid damper for pickup armature .15

laminations for 50 cycle operation 2.50 34311 Ring -Retaining ring for pivot shaft ...... .. .05

31039 Turntable -Finished turntable top plate only- 33529 Screw -Needle screw .10

less rubber mountings .95 MISCELLANEOUS ASSEMBLIES 4083 Washer -Leather washer .02

14231 Washer -Metal spacing washer .02 31051 3961

Foot -Rubber foot for cabinet Knob -Volume control knob

.04

.10 MOTOR ASSEMBLIES (See Figure 2) 31054 Mounting -Pickup arm mounting nuts, washer,

(110 volts, 60 cycle) and rubber .spacer .15 30244 Bushing-Rubbcr bushing for turntable center. .25 31048 Plug -2 -contact male plug for output cable .15 33345 Cap -Rubber cap for turntable spindle........ .15 33359 Volume control and switch 1.50



RCA PAGE 13-67

Turntable Rim Driven

MOTOR

RCA MFG. CO., INC.

MODEL R -94B Type Self-starting Induction Turntable Speed 78 r.p.m. (Adjustable) Turntable Diameter 10 inches D -C Resistance 110 volts, 60 cycles, 96.3 ohms;

110 volts, 50-60 cycles, 72.3 ohms

POWER SUPPLY RATING A.6 105-125 volts, 60 cycles, 25 watts A-5-6 105.125 volts, 50-60 cycles, 25 watts

General Description The RCA Victor Record Player Model R -94B consists of a self-

starting motor turntable mechanism, a crystal pickup, an aurally compensated volume control, and a motor switch. This record player can be adapted to play records through the audio amplifier -loudspeaker system of practically every type of radio receiver. The cabinet is of walnut veneer, and has a hinged lid, which locks in the "open" position -but should be closed while records are being played. Any record up to and including the 12 -inch diameter size may be played on this instrument. An automatic switch turns the motor "off" when the end of a record has been reached.

Service Data The crystal pickup unit is thoroughly sealed in a metal casing,

against extreme changes of climate. The offset mounting of the crystal unit in the pickup arm insures ideal tracking between needle and record grooves. If failure occurs due to a defective crystal unit, no attempt should be made to repair the unit, but a new replacement crystal unit should be installed.

The turntable drive, is a self-starting, variable -speed, governor -type, induction motor. The motor speed adjusting screw is located under

LIODEL R -94B Phono

MODEL 0-3

PICKUP Type Crystal Impedance 80,000 ohms at 1,000 cycles Volume Control Resistance 250,000 ohms Average Output Voltage 12 volts at 1,000 cycles

across 250,000 ohm load CABINET DIMENSIONS Height 7.13/16 inches Depth 12-31/32 inches Width 151 inches Net Weight 122 pounds Shipping Weight 18 pounds

the turntable, which must be removed for speed adjustment. The motor speed should be 78 r.p.m., and may be checked by placing a piece of paper between a record and the turntable, with the paper protruding beyond the edge of the record, and then counting the number of revolutions of the turntable per minute. The motor is designed to be simple and foolproof in operation. Occasionally, however, lubrication and certain adjustments may be required. These are illustrated and explained in figure 1. In addition, an application of oil to the felt pad, which rubs against the governor disc, will insure smooth operation.

The turntable is started by pushing to the rear the motor starting lever, which appears to the right of the turntable. The adjustment on the automatic motor stopping switch should be made so that the switch will snap to the "off" position when the needle in the pickup head is 15 inches away from the center of the turntable. The locking screw and details of the switch mechanism are shown in figure 2.

The volume control is of the potentiometer type, tapped to give aural compensation at low volume settings. The output lead from the volume control is a single shielded wire, terminating: in a small, male, pin plug. See figure 3. This pin plug fits into the female jack receptacle on most of the RCA Victor 1939. "90" series of radio receivers.


Unit List

Price STOCK

No. DESCRIPTION Unit List

Price

MOTOR ASSEMBLIES 14559 Resistor -10,000 ohms, I watt (R2) .20 11703 Governor -Motor governor complete 3.05 12264 Resistor -220,000 ohms, I watt (RS) .20 30475 Motor -105-125 volts, 50-60 cycle (M50).... 22.76 13573 Screw -Motor mounting screws, washers and 14800 Motor -105-125 volts, 60 cycle (M50) 19.75 30100

rubber cushions Spring -Tension springs for automatic brake - .30

PICKUP AND ARM ASSEMBLIES 31213 one long and one short spring

Support -Lid support -

.08

.40 31212 Base -Pickup arm pivot shaft, trip lever, and 14804 Switch -Motor switch -located on automatic

base assembly .95 brake (S1) .60 31050 Crystal -Pickup crystal and needle screw 3.75 14801 Turntable 4.36 31211 Pickup and arm complete -less rubber mount- 31108 Volume control (Rl) 1.00

12539 ing and nut

Screw -Pickup needle screw 7.10 ACCESSORIES

MISCELLANEOUS ASSEMBLIES

.22 9824 Switch and cable assembly - for use with re -

ceivers requiring a switch for changing from Phonograph to Radio -complete with mount -

14803 Brake -Automatic brake complete 2.95 ing screws, washers, and knob 1.00 4870 Capacitor -.025 mfd. (Cl) .20 14179 Adapter -Special octal base adapter with grid

11704 Damper -Turntable rubber damper and damper connection (pin No. 5) split and a 2,700 ohm plate .25 resistor internally connected from cathode (pin

31051 Foot -Rubber foot for cabinet .04 No. 8) to shell (pin No. 1), 3 terminals on 13085 Hinge -Lid hinge .22 side 1.85 3961 Knob -Volume control knob .10 14180 Adapter -Special octal base adapter with grid

31054 Mounting -Pickup mounting nut, washer, and - connection (pin No. 5) split, 2 terminals on rubber cushion .15 side 1.60


105-125 volts, 60 cycles constant speed motor 78 rpm.

Mechanical Reproducer

Lubrication. -Motor drive bearings should be lubricated with a good grade of oil at least twice a year.

Caution. -Keep all rubber drive parts free from oil.

IDLER SPRING

01t. \\

MOTOR \\ BOARD

OIL.

MOTOR SPINDLE

IDLER

/ OIL

0-3 PHONOGRAPH MOTOR

MODEL O-3

OL

TURNTABLE SPINDLE

Electric Motor Driven Portable

STOCK No.


39526

39530 39531 39533 39528 39534 39527 39532 39529

33691

33678 33680 36574 36575 36577 33692 33690

30368 39522 33694 33684 33689 39523 33688

MOTOR ASSEMBLY Motor -Complete motor including mounting

plate, spacers, screws, washers, and nuts Plate -Idler wheel plate Retainer -Retaining clip for turntable spindle Retainer -Retaining clip for idler wheel Spindle -Turntable spindle Spring -Idler wheel tension spring Turntable Washer -Fibre washer for turntable spindle.... Wheel -Idler wheel and tire

MISCELLANEOUS ASSEMBLIES Arm -Tone arm -less neck, base, washer, ring,

screw and lockwasher Cover -Needle cup cover Cup -Needle cup Foot -Cabinet foot (glide) Handle -Carrying handle _(black) Hinge -Cabinet lid hinge Neck -Tone arm neck Screw -Screw and lockwaaher to fasten neck on

tone arm Sound Box Spring -Conical spring to hold turntable. .

Support -Cabinet lid support Support -Sound box support Support -Taper tube support Switch -Motor switch Washer -Tone Arm Bearing washer and retain-

ing snap ring

5.25 .90 .02 .02 .30 .02

1.50 .02 .90

1.35 .30 .15 .10

1.40 .40 .70

.10 3.00

.90

.15

.35

.60

.10


68 RCA

MODLE R -94B Phono RCA MFG. CO., INC.

Connecting Record Player to Radio Receivers A table giving methods of connecting the Record Player to various

types of audio systems is shown in the following text. Also included are the model numbers of the various RCA Victor Receivers to which the particular method shown applies. The data given in the table requires that an RCA Stock No. 9824 "Radio" -"Phono" switch be used for switching from radio to phonograph, as desired. For ease in connecting the "phono" lead to the Stock No. 9824 switch, the male plug on the end of the shielded lead should be removed by unsoldering, or cutting it off.

In general, the Record Player must be used with radio receivers having at least two stages of high -gain audio amplification. The Record Player output should be connected to the grid of the first audio tube, and at the same time the output of the radio receiver portion of the chassis should be shorted or opened, to prevent radio signals being heard while the Record Player is in operation. CONNECTING RECORD PLAYER TO:

1939 RCA RADIO RECEIVERS OF "90" SERIES :

Plug male jack on end of Record Player into female receptacle on receiver chassis. Push or turn "Phono" switch to "Phono" position, and operate Record Player according to instructions.

RADIO RECEIVERS HAVING "PHONO" TERMINAL BOARDS. 9924

!, qq p 5T

SWITCH

A l- E I ITI T I vrION4O VvoSEwwN ' '

O I I!I II Wild s r'` -1 GREEN

eLUE [ ( t r' , , I_ YELLOw ,

SHIELD TO TERM

NIELD

TAPE END OF REO AND BLUF DS

IM RECEIVER S FSWIPPEw Y'[ TERMINAL,Fa

n P440º

RCA Radio Receivers to which the above illustration applies 5T1, 5T4, 5T5 5T6, 5T7, 5T8, 6T5, 8T2, 8T11, 8K11, 85T5, 86E, 86K, 88'Ií, 86T1, 86T4, 86K7, 86T44, 87K, 87T, 87K1, 87K2, 87T2, 88K, 810K, 810K1, 810T, 810T4, 811K, 812K, 813K, 816K, 811T.

For following Receivers, Yellow lead should go on Terminal No. 1, Green lead on Terminal No. 2: 6K2, 6T2, 6K3, 6T10, 7T1, 7K1, 85T8, 86T3, 87T1, 86T2, 86T6, 6K10.

Insulate shield of switch wires from chassis, on following RCA Receivers: 5T, 6T, 6K, 6K1, 7T, 7K, 7X, 8T, 8K, 86X4, 87EY, 87X, 87Y, 8T10, 7X1, 8K1.

Receivers having a Four Terminal Board: 9K, 9T, 9K1, 9K2, 9K3, 9K10, 10T, 10K, 10K1, 13K, 15K. Reverse Red and Blue leads to Terminal Board of C9-6, T9-9, T8-16, C8-17.

PMONO

RADIO RECEIVERS USING 6C5 OR 6J5, 6C5G OR 6J5G. TUBE FOR FIRST AUDIO AMPLIFIER.

STOCK Nº 9824 r RADIO-P,IONO SWITCH

STOCK N9 1 STOCK Ng 1 (REAR VIEW) 14179 1 14180 1 -PHONO' POSITION

r TGAEEN

SHIELD1

ei - 1 BLUE I I Er NMFD. L J

RED NOTE- WHEN STOCK N4 14179 15 USED AND TUBE 15 OF 'G' TYPE CARE MUST BE TAKEN TO SEE THAT

SHIELD TERMINAL Nº 1 IS GROUNDED ON TUBE _ SOCKET. WHEN STOCK Nº 14180 IS USED RED LEAD SHOULD BE TAPED.OMITC. 5ß540B

Stock No. 14179 Adaptor opens grid circuit, and inserts 2.700 ohm resistor in cathode of 6C5 or 6J5 tubes, for bias on Phono reproduction.

Stock No. 14180 Adaptor opens grid circuit of 6C5 or 6J5 tube. Stock No. 14180 Adaptor necessary for RCA: C11-1, C13-2,

T10-1, C11-3, C13-3. Stock No. 14179 Adaptor necessary for RCA: C15.3, C15-4.

ELLOW

PHONO LE

RADIO RECEIVERS WHOSE FIRST AUDIO AMPLIFIER TUBE IS OF THE GRID CAP TYPE.

TAPE REMO,"

GRID _

LEAD

SHIELD)

LLOW

RED TAPE Cam BLU

NOTE'- THIS METHOD FOR USE ONLY WHEN BIAS FOR THE TUBE IS OBTAINED BY MEANS OF CATHODE RESISTOR MSL404

RCA Receivers for which above method applies: 125, 128, 128E, 224E, 225, 226, T6-1, C6-2, T6-9, T7-5, C7-6, T7.12, C7-14, T8-14, C8-15, T8-18, C8-19, C8-20, C9-4, T9-10.

STOCK Nº 9824 SW ITCH

(EAR PHONO- ONO POSITION

GRES

ONO EAD

RADIO RECEIVERS WHERE RECEIVER VOLUME CONTROL IS TO BE USED TO ALSO CONTROL "PHONO" VOLUME.

RADIO RECEIVERS WHOSE FIRST AUDIO TUBE IS OF THE GRID CAP TYPE. AND FIXED BIAS FOR TUBE IS OBTAINED THROUGH GRID LEAD.

.2S MFD CAPACITOR

NOTE- REMOVE BLUE ANO RED LEADS CONNECT YELLOW LEAD TO TERMINAL SHOWN.

SPEED ADJUSTMENT (SCREW) TO DECREASE SPEE TURN CLOCKWISE

RB- SPEED ADJUSTMENT LOCK NUT

TURN SPEED ADJUSTER SO THE FEL WILL PROTRUDE )46"WHEN ALL THE WAY IN. ADJUST GOVERNOR SO AS TO LEAVE As" BETWEEN FELT AND DISC, THEN SECURE BY MEANS OF GOVERNOR SCREW.

ADJUST SO THAT SHAFT IS FREE TO ROTATE WITHOUT END PLAY

REMOVE TO TAKE OFF GOVERNOR

POWER CORO

OIL 7, KEEP FILLED WITH LIGHT OIL TO INSURE SMOOTH OPERATION

Figure 1 -Motor Adjustments ADJUST SWITCH 70 r/fIP WHEN NC£DLC IS ON I I4 S6 RAO. FROM E OF MOTOR SPINDLE.

DO NOT CHANGE THIS ADJUSTMENT

FFCA PG CD.INC M-BIT4-P

Figure 2 -Motor Switch Adjustment

BROWN'

BLACK CRYSTAL PICKUP I

(BOTTOM VIEW)

BOTTOM VIEW

RI VOL. CONTROL 230,000 n

C I .025 MFG..

SHIELD EXTENSION

OUTPUT PL G

Figure 3 -Wiring Diagram


RCA PAGE 13-69

RCA MFG. CO., INC.

Output Meter Alignment.-Connect the meter across the voice coil, and turn the receiver volume control to maximum.

Test-Oscillator.-Connect the low side of the test -oscillator to the receiver chassis, through a .01 mid. capacitor, and keep the output as low as possible.



Tune test-osc. to-

Turn radio dial to-


output

1


.01 mfd. 455 kc

Quiet point 1,600 lac

end of dial

L8 and L9 2nd I -H

transformer

2 1st Det. grid


L6 and L7 1st I -F

transformer



minimum C25 (osc.) C31 (osc.)


Frequency C23 (ant.)


TURNTABLE

DRIVE WHEEL

MOTOR SPINDLE

MOTOR

NEEDLE PACKAGE HOLOER

TURNTABLE SPINDLE

PICKUP REST

NeEDLE SCREW

CUP FOR USED NEEDLES

PICKUP ARM

MODEL V-105,Ch.RC-517C

FREQI'ENCY RANGE 540-1,650 kc


PILOT LAMP 1-Mazda No. 51, 6-8 volts, 0.2 amps.

POWER SUPPLY RATING 105-125 volts, 50 cycles 5ß watts 105-125 volts, 60 cycles 55 watts

LOUDSPEAKER (RL -SIB -4) Type 5 -inch electrodynamic V.C. lmpedince 4 ohms at 400 cycles

Phonograph Motor Service Data:- The phonograph motor is of the self starting synchronous type and

operates the turntable through friction drive between the motor drive spindle and the rubber tired idler on the rim of the turntable.

The motor should be lubricated once or twice a year by placing a few drops of S. A. E. 20 (or equivalent) on the turntable spindle and saturating the oil retaining felt pads on the motor shaft with S. A. E. 10 oil. Caution-The motor drive spindle and the rubber tire on the idler must be kept clean and entirely free from oil and grease at all times.

Power Supply.-Although this model employs an ac -dc chassis, it is not suitable for use on d.c., as this would damage the motor.

ANT. TO GRID CONV. GAIN II

0.41( II

O.BX Nt. lox (GOO KC.)

1OOX(600-455KC)1(455KC.)+-160K (455KG.) (451.iKr1.)-

MEASURED WITH 3V. FIXrD flln i 125A7

1ST.DET. - OSC.

m

(=>

C8 .00

Q o

Loo P

L2 LOOP

LI

C23* -1C22 3-I0

T¢365RiW 22.1-1

j ¡U 3 L3 C31 m RED 3-10

g1 71 c.25

10 T45_170 X MAY.. AVC APPROX.

BL,K YEL.

G <N© 7: V.

¢c 5 80v L6 L7 F ! C

12r;K 7

78V.

C26; _ C27 100 8

A e.8n D ,

I.F.

ú

PHONO RADIO

LOUD -SOFT /Fit/LIN I MELLOW MELLOW'S

VOLUME PHONO- RADIO \TUNING CONTROL POWER -TONE CONTROL

CONTROL

4OX (4Oon.)

12SQ 7

2ND. DETAF, AVC.

1( Bev

LB L9

IC & a

C281 I 1023 R3 120 33 Al ñ 10n.i

$OV.

(Goo KC -9v. (1500 K .)

C0.1 RIS

3V. BIAS 1 rNVti FOR GAIN T _ 220 M m7 DATA

Top VIEW C25 -05C 1560 KC.

C 23 -ANT. 1300 KC.

VOLTAGES SHOULD HOLD WITHIN t 20% WITH 117 V. AC. SUPPLY.

ìF MEASURED WIT H CHANALYSTOR VOLTO/IMYST

I

CHASSIS GROUND

COMMON WIRING INSULATED FROM CHASSIS (B-)

C31-OSC\ 1560 KC

1ST. I.F. 2ND. I.F.

(TRANSI. íTRANSS. 12 ® I I2 12507

L6 -BOTTOM LB -BOTTOM L7 -TOP L9- TOP 4.35 KC. 435 KC.

C 20 1 220 I

R4 2.2 MEG.

R15 500 M VOLUME CONTR.

ó5 I RADIO- PHOI'Or TONE $,POWER SWITCH. SHOWN IN OFF P05IT ION -

121647M -C17 '.015

ö8 ._1(PICKUP_

MOTOR

C30 1001

C15 0025

C7

005

RI7 47M

SI FRONT r I

I

220M

f. C9 o1

R9 120

14. I4X ( 400 Ad) APPROX. GAIN DATA USING RCA RIDER CHANALYST

50L6 GT OUTPUT

4V

RIO 470M

IOV. C11 85v. .025

i RED

Iii50,`v I L10(11

RII l l

1500 BLUE

i

REO

GI4

SOED

56ME6.

50L6G 12 123K1 7 12507

4 3 Ì\ 3 -4-

> 35Z5GT RECT.

C12

DIAL LAMP

0.25

ºI 52

REAR

P-84667-2 VIOS (RC517C)

OR'Ni Ct3

MFD

POWER SUPPLY 117 V.


70 RCA

MODEL V-135,Ch.71C-517H RCA MFG. CO., INC.

POWER bUTPUT Undistorted 1.6 watts Maximum 'S watts Pilot Lamp (1) Mazda No. 51, 6.3 volts, 0.20 amps.

POWER SUPPLY RATING 105-125 Volts, 60 Cycles 65 watts

LOUDSPEAKER (RL86B6) Type 5 -inch Electrodynamic V.C. Impedance 4 ohms at 400 cycles



Tune test-osc.

to-- Turn

radio dial to- Adjust the follow - ing for max. peak

output

1 I -F grid, in series with .01 mfd.

455 kc Quiet point

1,800 kc end of dial

L8 and L9 2nd I -F

transformer


.01 mfd.

LB and L7 1st I -F

transformer

3 Ant, terminal in series with



4 Radiated signal 1,300 kc Signal

C3 (ant.) )


CS -OW. 1600 1C

LOOP

C6- OSC. ~1600 KC.

C3 -ANT. 1210o KC.

18- BOT. LS -TOP 455 KC.

2 12SK1

PHONO. JACK

-t2X50x -I (600-455KC)

MEASURED I2SA7

1ST. PET. & OSC. BOTTOM VIEW Of TUBE SOCKETS

L2 LOOP

LI

C Q oBÑJi

C, - C34C4A;=.. ,005 3-10 9-365

3V. 1 - FIXED BIAS NR T}

GAIN DATA I

m

R2

0 .6:

22M

H

3

12SQ1

Frequency Range 540-1,600 kc Intermediate Frequency 455 kc

PICKUP TURNTABLE. RECORD SUPPORTS MOTOR BO ARD

r - TURNTABLE

SPINDLE

; iáf'; rT-:.t:.____. 1- -+ - t- +

>---?Ii--- ; -- 1

MOTOR SPINDLÈ'?

IDLER WHEEL

`.' .. .+.í.

/17s I MOTOR,SY `

\I MOTOR e-'i r

I CABLE'- TWO SHIPPING BOLTS \CONNECTWILif

. WITH RED HEADS

CHASSIS r - -ï_ ; TWO CHASSIS BOLTS i -^ ICNUP LEAD r--"" t CONNECTION:

st

ri -

CHASSIS; BOARD

R I I

IS

O ex 200X I X - (4S5Kc) (4 551(C) I (455 -KC)

WITH 5V. F1XHD PIA3 ---- 1'l SK-/

1.1.

95`/O

) N© 15T. I.F. 95 TRANS.

ó -F-1 b _ ici $ - IIo

LG L7 D' 711 79. M

á *12V. (1500 KC) l9 - eV. (550 KC) L3

m

RG 33

2 HD. I.F. TRANS .

FOUR CHASSIS BOARD SCR WS R -sa,

) 40X (400 ti )

FIELD

750n Rio 330.n.

12Sß7 2ND. DE T., AF., AVC.

irr 52V.

D1 ó

1Ó 1

_ p 1C15 `1r, 120

I A -L8 LS 1- -- - 70 7n J

RED I d á CS C6 +C7 ó p3 -,O T3 -10T7.5_,70

L4 LS ER 7n

C II 0.1 - C1.5

.005 -

R9 1200

R7 47 M

C16 220

C 25 .0025

1(- -15V. APPROX MAX. AVC

C2 -- RI

0.1 220 M

PHONO JACK

C9 0.1

R4 82 C10 Isr,o

CATHODE CURRENTS I) 12547 - - - 11.0 MA.

(2) 1251(.7 - - 14.0MA. (3) 12507 - - - .4MA. (4) 3"-6GT -

- - 48. OMA. 15) TOT. ' RECT - - 74.0 MA.

1 CB

T0015

RB 2.2 MEG.

C21 -.05

Ç,120. CONN5 VERTICAL'HI" TO THIS TERMINAL VERTICAL' 0" TO CHASSIS.

R13 220 M

12X (400 ,v)

IC24 .01

35L6GT OUTPUT

-45v

C 2G .035

II


II7V. 125V.

Buie TI M.C.

R14 RIS 150 470 M

= C

R12 4.7 MEG.

820

PICKUP

RS VOL.CONTR,

500 M

SI FRONT

z

w I I .

SI REAR

-+o

x Raó3ft` 2b5V m 9 330 F1EL0

750,1.Ç I

g 1

`IC12 O

1.--11' 1 MFl). 1='

II '20 `619 1 ei (I

T7I MFU. MFD. m

RII IS

PILOT LAMP

{-92233-I ti/ t! /1G

v135 (HCSI7 H)

1604.21

RED

V. (1 lJ

E.M svKe

i VOLTAGES SHOULD

HOLD WITHIN WITH 117 V. AC. SUPPLY.

* MEASURED WITH CHANALYST OR VOLTOHMYST.

GET ILáA7 15357 IL507

2 I 9

SOY6 GT RECT.


RCA PAGE 13-71

x2 00 0

RCA MFG. CO., INC. MODEL V-140,C$.RC-572A

OO O O O O O 11i ó 1['1 ('N O CO 111

Wt

. 00UÙ 032!

n,¡) )-O á = s

00 o, 4

_Jr Ny Of

[ZNN Jn i

U)

e u

N

u 11

V

a

Ei

m0 - N

ª-1 UoT

4", mó CfN

>x> c12&3

*Q4

p u0d0 r z :+

mNO ó ,..ii,' -q UO

cr ao º^o U

r r; X Qo

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cú e

cp

03T2

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vMt 1 m úM1 a32 I ~ ji)419

J co

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U W

o

M

; Io

N m

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© © eabo o ,, © oo

ÿ C/? Ch

"1:: _ á - b'^ Ch

o ó d

-, ó ÿ c:

ó v :_

L NQ ' Tl W 4G ?ç

(-,..,.z,.°

ö b G t= mr é O s a

_eÉc Ñó °j U H ç r V a H J ,,, a C 0:3 _ 0 (.2 t ?a 4- CO O ti

= 0 z w' riE-lPj ° .á_c á. t ÿ q U J :Y h L

IqOj Ó Ó 3 O . o! ._ Z t-... ÚÚ COMl/:

V, a W ""

// ó wrx.4

nó

ió


72 RCA MODEL V-140,Ch.RC-572A RCA MFG. CO., INC.

Alignment Procedure Cathode -Ray Alignment is the preferable method. Connections for

the oscillograph are shown in the schematic diagram. Output Meter Alignment. -1f this method is used, connect the

meter across the voice coil, and turn the receiver volume control to maximum.

Test -Oscillator. - For all alignment operations, connect the low side of the test oscillator to the common negative, and keep the output as low as possible to avoid a -v -c action.

Electronic Voltmeter. -The electronic voltmeter in the Chanalyst or VoltOhmyst provides an unexcelled output indicator. It should be connected to the AVC bus, and the test -oscillator output adjusted to produce several volts of AVC.

Calibration Scale. -The glass tuning dial may be easily removed from the .cabinet 'and temporarily attached to the chassis for 'quick reference during alignment. In the event that only the chassis is

-returned for service, and the cabinet with its tuning dial is left in the customer's, home, the scale printed in this service note can be used as an accurate and convenient substitute for the regular dial. With gang in full mesh, move the dial pointer to a point 1/16 inch to left of reference mark at left hand end of the dial backing plate. Place the dial under the pointer so that the extreme left scale graduation coincides with the pointer. Use scotch tape to hold the dial in place.



Tune test-osc. to-

Turn radio dial to-

Adjust the follow - ing For max. peak

output


.01 mfd. 455 kc


end of dial

L9 and L10 2nd I -F

transformer


.01 mfd.

L6 and L7 1st I -F

transformer

S Ant. terminal in series with

200 mmfd. 1,720 kc Gangat

minimum C10 (osc.)


Frequency Cl (ant.)

5 Radiated signal near 600 kc Frequel ncy (Rock gang)

6 Repeat steps 3, 4 and 5.

Critical Lead Dress: 1. Lead from 6SK7 i -f plate to last i -f transformer to be dressed

close to chassis and under all other leads. Prevents i -f beats.

2. 22,000 ohm R-10 i -f to audio isolating resistor to have end connecting to last i -f transformer as short as possible. Prevents i -f beats.

3. First audio grid coupling capacitor C-23 and C-24 to be dressed close to chassis and away from heater wiring. Prevents hum.

4. Dress phono power leads away from phono socket.

2516 GT

26

BK ,1 is BALLAST

K- 83747 (

L9- BOTTOM L10-TOP 455 KC

CI -ANT. Icon Kc.\

t5 -O SC. boo KC

L0 -BOTTOM L . TOP

00000 JACK 455 KC

FIELD

1- B 5ooss

CIo-osC 1710 KC

LOOP

B

SIMPLIFIED SCHEMATIC VOLTAGE DOUBLER CIRCUIT

V-140

Replacement Parts

STOCK No.

DESCRIPTION Unit List

Price STOCK

No. DESCRIPTION

Unit List Price

CHASSIS ASSEMBLIES 14560 Resistor -100,000 ohms, 4 watt .20 (RC -572-A) 14583 Resistor -220,000 ohms, * watt .20

14649 Ballast -Ballast tube resistor .80 30651 30648

Resistor -270,000 ohms, 4 watt Resistor-470,000ohms, * watt

.20

.20 37846 Capacitor -Electrolytic -30 mfd., 150 volts.... .50 30649 Resistor -2.2 * watt .20 37845 Capacitor -Electrolytic comprising 1 section of 30931 Resistor -4.7 meg., 4 watt .20

50 mfd., 250 volts, 1 section of 10 mfd., 250 35862 Shaft -Tuning knob shaft .20 volts, and 1 section of 30 mfd., 150 volts... 1.00 31365 Socket -Dial lamp socket .30

12720 Capacitor -100 mmfd., moulded -35 33742 Socket -Phono input socket .20 34699 Capacitor -100 mmfd., unmoulded .30 31251 Socket -Tube socket .25 31813 Capacitor -120 mmfd. .30 31418 Spring -Drive cord spring .05 36616 Capacitor -220 mmfd. .30 31261 Spring -Retaining spring for oscillator coil core 12537 Capacitor -560 mmfd. 35 and stud .01 33806 Capacitor -.0015 mfd. .25 39492 Switch -Toni switch 1.30 34459 Capacitor -.0025 mfd. .20 35636 Transformer -First I.F. transformer 1.70

4838 Capacitor -.005 mfd., 1,000 volts .25 36615 Transformer -Second I.F. transformer Tube

1.60 33584 Capacitor -.005 mfd., 1,200 volts .25 14649 .80 -Ballast tube resistor

Washer -"C" washer for tuning knob shaft 14393 Capacitor -.01 mfd. .30 33726 .02 36248 Capacitor -.02 mfd. .20 32787 Capacitor -.05 mid. .20 AUTOMATIC RECORD CHANGER 32786 Capacitor -0.1 mfd., 300 volts .25

4839 Capacitor -0.1 mfd., 400 volts .30 See sepaiate Service Bulletin RP -182 Record 30965 Capacitor -0.25 mfd..... .30 Changer. 39491 Coil -Loop primary coil .40 SPEAKER ASSEMBLIES 39487 Coil -Oscillator coil .75 (RL -79B-6) 39489 Condenser -Variable tuning condenser 3.40 38408 Control -Volume control and power switch 2.00 31825 Cap -Dust cap .02 32634 Cord -Drive cord (approx. 33 -in. overall lgth.) .10 37850 Coil -Field coil -500 ohms 1.70 36093 Core -Adjustable core and stud for oscillator coil .15 39495 Cone -Cone complete with voice coil 1.10 39493 Indicator -Station selector indicator. .20 5118 Plug -3 -prong male plug for speaker .25 37982 Insulator -Phono socket insulator .04 37844 Transformer -Output transformer 1.70 39490 30868

Loop -Antenna loop complete Plug -2 -contact female plug for motor cable

1.80 .35 MISCELLANEOUS ASSEMBLIES

5119 Plug -3 -contact female plug for speaker cable .25 38354 Clamp -Dial clamp .15 36230 Pulley -Drive cord pulley .04 39497 Deca comania-Control panel decal .15 14649 Resistor -Ballast tube resistor .80 36386 Decalcomania -Trade mark decal (His Master's 38859 Resistor -15 ohms, 1 watt .22 Voice) .25 30785 Resistor -150 ohms, 1 watt .22 35467 Decalcomania -Trade mark decal (RCA Victrola) .05 36743 Resistor -1,800 ohms, 2 watt .25 39496 Dial -Glass dial Ccale .90 30694 Resistor -3,900 ohms, * watt .20 13085 Hinge -Cabinet lid hinge .22 30734 Resistor -5,600 ohms, i watt .20 35814 Knob -Control knobs .25 22993 Resistor -6,800 ohms, 1 watt .22 31480 Lamp -Dial lamp .20 30492 Resistor -22,000 ohms, } watt .20 39351 Mounting -Spring mounting hardware for motor - 30409 )Resistor -27,000 ohms, } watt .20 board (2 required) .25 12454 Resistor -33,000 ohms, } watt .20 38873 Spring -Conical mounting spring for motorboard .05 12412 Resistor -47,000 ohms, } watt .20 30900 Spring -Retaining spring for knobs .05 14023 Resistor -82,000 ohms, * watt .20 39545 Support -Lid support .40

ALL PRICES ARE SUBJECT TO CHANGE OR WITHDRAWAL WITHOUT NOTICE


RCA PAGE 13-73

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74 RCA

25M 19m

1

SPINDLE

RECORD SUPPORT ¡ TURNTABLE START -REJECT BUTTON

Refer to RP -158 Service Note for

The dial scale drawing shown is a full size reproduction. It can be used as a direct substitute for Automatic Mechanism.

regular dial scare in alignment procedure.

P:CKIJP TURNTABLE: .tOTOREIOARD

E PlNDt.I - 1

7 '17.4/4e.?! lüir si . MOTOR - 4 1 1

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TERMINAL BOARD LIN .

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ZIIASSIS LOOP ANTENNA

CHASSIS MOUNTING BOARD

CG

MODEL V-175, Ch.RC-532' RCA MFG. CO., INC.


Test-Oscillator.-For all alignment operations, connect the low side of the test -oscillator to the common negative wiring, and keep the output as low as possible to avoid a -v -c action.

Electronic Voltmeter.-The electronic voltmeter in the Chanalyst or Voltöhmyst provides an unexcelled output indicator. It should be connected to the AVC bus, and the test -oscillator output adjusted to produce several volts of AVC.

CS/ cw C -05C. A.OSC. 15.2 MC 1500 KC.

Calibration Scale.-The glass tuning dial may be easily removed frdm the cabinet and temporarily. attached to the chassis for quick reference during alignment. In the event that only the chassis is returned for service, and the cabinet with its tuning dial is left in the customer's home, the calibration scale printed full size in this service note can be used as an accurate and convenient substitute for the regular dial.

Each method is described below.

Using Tuning Dial. - 1. Remove the glass dial from the cabinet.

2. With gang in full mesh, move the dial pointer to the reference mark at the left-hand end of the dial backing plate.

3. Place the glass dial under the pointer so that the extreme left scale graduations coincide with the pointer. Use scotch tape to hold the glass dial in this position.

4. After completion of alignment, replace the glass dial in cabinet.

Using Calibration Scale. - 1. With gang in full mesh, move the dial pointer to the reference

mark at the left-hand end of the dial backing plate.

2. Temporarily fasten the dial scale drawing in this service note, to the dial backing plate with scotch tape, so that the extreme left scale graduation coincides with the pointh.

Dial Pointer Adjustment.-After the chassis is replaced in cabinet move the dial pointer (if necessary) so that it is at the left-hand graduation on the dial with the gang in full mesh.

Critical Lead Dress (1) Dress bias cell up from chassis and away from A.C. switch.

(2) Dress R13 (volume control compensation circuit) close to front apron.

(3) Dress CO between osc. coil and side apron.

(4) Black lead from AC switch should be kept away from tone control leads and switch.

(5) Dress 1222, C32 (pickup compensation circuit) close to front apron.

(G) Keep 124 and C5 bus (1st det. grid circuit) (socket end) as short as possible.

(7) Blue lead to antenna terminal board should be dressed in back of I -F'S.

(8) Dress brown lead front volume control to tone switch close to front apron.

(9) Dress R18 (output grid cricuit) away from A.C. switch and A.C. leads.

(10) Dress lead to phono. socket up from chassis.


side of test-osc. to-

Tune test- oac. to- Turn radio

dial to- Adjust the follow - ing for maximum p.ak output-

1.

I-F Grid in series with

.01 mfd. 455 kc "A" Band

540 kc

Lll L12 (2nd I -F Trans.)

2 1st-Det. Grid in series with

.01 mfd. LO, L10

(1st I -F Trans.)

3 "A" terminal on ant. terminal

board in series with

47 nunf. (link open)

16.2 me "C" Band 15.2 me

C37 (inc.)* C34 (ant.)

4 9.5 me "C" Band

9.5 me Cl (ant.)

(Rock Gang)


6 Middle terminal on ant. terminal

board in series with

200 mmf. (link open)

1,500 kc "A" Band0 C10 (osc.) C33 (ant.) (on loop)

7 600 kc "A" Band

600 kc L7

(Rock Gang)


* Use minimum capaci y peak. Oscillator tracks 455 kc above signal on both bands.

55 60 70 80 100 130 160' E allt i t / t t t t a is tib t a t 1 t t

1 1 1 i 1 II 1 1. r T 1 1. 1 1 1 t il 11 1.1111e1

q3 3"m HO II

RED BRACKET AND TWO SCREWS

TWO SNIPPING BOLTS WITH RED HEADS

13 14

- RECORD SUPPORT

MOTOR BOARD

PICKUP ARM

PICKUP

PICKUP REIT

SW ITCN

Data on


RCA PAGE 13-75

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RCA MFG. CO., INC.

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76 RCA

MODELS V-209, V-210 RCA MFG. CO., INC.

Push Button The push buttons connect to separate magnetite -core oscillator coils

and separate ant, circuit trimmers which must be adjusted for the desired stations. Use an insulated screwdriver or alignment tool auch u RCA Stock No. 81081..AIlow about five minutes warm-up period before making adjustments.

The procedure is u follows: 1. Make a list of the desired stations, arranged in order from

low to high frequencies. 2. Turn the range switch to the broadcast position and manually

tune in the first station on the list.

8. Turn range switch to púsh-button position and press in the left-hand button.

LINK

960 TO 1600 KC

TRIMMER SCREWS CORE RODS

C3

2 SI (FRONT) 3

PLUGS

Do1O AI

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SOCKÉTS

10

9

C1

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C5 2

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740 TO 1430 NC

® 5 4 0 0

Adjustments 4. Adjust No. 1 oscillator core to receive the first station. To

secure the best adjustment, rotate the set for least pickup, and adjust core for peak output.

5. Adjust No. 1 antenna trimmer capacitor for peak output on the first station.

6. Proceed in the same manner to adjust for the remaining stations.

On the 880 to 1,800 kc push-buttón, the higher frequency stations may be received with osc. core either in or out (oscillator frequency either 466 kc below or 455 kc above the station frequency). The adjustment with this core in its out position (oscillatorfre- quency 455 kc above the station frequency) is the correct one.

NOTE: Clockwise adjustment of cores and trimmers tunes the circuits to lower frequencies.

FOR CHANGE IN MODEL V-209 5ßh NEXT PAGE 610 TO 1210 1 640 TO

KC 110]06C

0 0 ® 3 2 1

0 ® I 0

ANT. COIL

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_LC9

LI LOOP GIG

K 9gt27 - V209 (RC573)

F.M. AND OFF \ SOFTf TELEV. \ 1 E PHONO

JJ

RADIO

POWER -VOLUME CONTROL

coerr.FtOLtf DIAL

PHONO- RADIO TONE CONTROL

P. M. AND

TELEV.

C12

A L9,

T NE BLE

FULL TONE

9 e

4 s

RECORDS SPINDLE RECORD SUPPORT

MOTOR BOARD

(PICKUP ARM

PICKUP

PICKUP REST

RECORD SUPPORT / TURNTABLE SWITCH MYNA START -REJECT BUTTON

Refer to RP -158 Service Note for Data on Automatic Mechanism

C17

S4 (REAR)

SASS

-FULL PHONO. TON2

SASE TREBLE

I

SPEECH-f I

} 04531

FULL TONE

RADIO

Control for both Models

,QA SHORT STANDARD WAVE BROADCAST

TUNING RANGE CONTROL CONTROL

Controls for Model V-209

ií8i%//'i /í0i

LOOP ANTENNA

PICKUP RECORD SUPPORTS C

SP:HOLE

TURNTABLE

MMOTOREH]ARD

TWO SHIPPING 1 BOLTS WITH

RED HEADS

MOTOR

AND BRACKETANDEO TWO

SCREWS

CHASSIS

I.1 CHASSIS MOUNTING BOARD

R-TST

Schematic diagram of antenna and oscillator switch connections for Model V-209. This model does not include push-button tuning. Other- wise the same as schematic of V-210.

f40*


LouS

PKONO

W /SOFT RADIO

POWER -VOLUME PHONO -RADIO CONTROL TONE CONTROL

DRIVE CORD

3 TURNS

liker STANDARD BROADCAST

TUNING RANGE CONTROL CONTROL

Controls for Model V-210

PUSH BUTTON ADJUSTMENTS `0se e0P

6 6 4 3 2 1

CHASSIS

JTERMINAL BOARD

G,

LINK

POWER CORD

A

4- -i-PICKtIf>MOTORBOARD I y TURNTABLE

o LOOP ° ANTENNA

'SPINDLE'_ - P

4 -fg -_A.'?

\ I -- i. er- _ `-.s,. -.è,7;;;;( . ...

- P

( MOTOR TO PHONO

F.M. & TELEV. JACK

SPEAKER TWO SHIPPING BOLTS

WITH RED HEADS

RED BRACKET AND TWO SCREWS

Model V-209 Model V-210


RCA PAGE 13-77

RCA MFG. CO., INC. MODEL.) V-209,7-210

55 60 70 80 100 120 140 160 t t t t t t I t I I t t t t t I t I t t t a t

Ref uteeda s s I 7 T s s r r

9? 31m 1 10 II

i

r r s s fy r s z s r t -t s

25 m 13 14 i9m) The dial scale drawing shown is a full size reproduction. It can be used as a direct substitute for

regular dial scale in alignment procedure.



Test-Oscillator.-For all alignment operations, connect the low side of the test -oscillator to the receiver chassis, and keep the output as low as possible to avoid a -v -c action.

Electronic Voltmeter.-The electronic voltmeter in the Chanalyst or VoltOhmyst provides an unexcelled output indicator. It should be connected to the AVC bus, and the test -oscillator output adjusted to produce several volts of AVC.

Calibration Scale.-The glass tuning dial may be easily removed from the cabinet and temporarily attacked to the chassis for quick reference during alignment. In the event that only the chassis is returned for service, and the cabinet with its tuning dial is left in the customer's home, the scale printed in this service note can be used as an accurate and convenient substitute for the regular dial.

Using Tuning Dial. - 1. Remove glass dial from the cabinet.

2. With gang in full mesh, move the dial pointer to a point 1/16 inch to left of reference mark at left hand end of the dial backing plate.

3. Place the glass dial under the pointer so that the extreme left scale graduation coincides with the pointer. Use scotch ape to hold the glass dial in place.

"C" Band Reception-For best reception on "C" band with an outside antenna, adjust the trimmer screw on the RF coil on the chassis. Turn screw carefully with a special screwdriver (RCA Stock No. 31081) while the receiver is tuned to a station in the 31 -meter band, and make setting for best reception. If returning to internal antenna at any time, close the link on the center terminal and adjust "C" band antenna trimmer for best reception on 31 -meter band.

L5- Á 'bSC. 600 KC.

C6-"C'OSC. /15.2 MC

C 10'ÁOSC. ® ANT 47 /1500 KC.

COIL z C7-"C"ANT. La.ts ., MC. C37

C39

2ND. I.F. TRANS.

Steps Connect test-osc. output to- Tune test

osc. to- Turn radio dial to-

Adjust the following for maximum

peak output-

1 I-F grid in series

with .01 mfd.(2nd 455 kc "A" band

540 kc

L12 and L13 I -F trans.)

2 1st Det. grid in

series with .01 mfd. L10 and L11

(1st I -F trans.)

3 A -Terminal in series

with 47 nunfd. (link closed)

15.2 me "C" band 15.2 me

C9 (osc.)* C7 (ant.)

4 9.5 me "C" band 9.5 me

C5 (ant.) (Rock gang)

5 Repeat steps 3 and 4

6 Yellow loop lead

in series with 200 mmfd.

(link closed)

1,500 kc 1,5 00 kc C10 (osc.)

7 600 kc "A" band

600 kc L9 (osc.)


9

Install and connect chassis in cabinet with antenna link closed. Tune in a radiated oscillator signal at 1,500 kc. and 'Disk the "A" band trimmer C2 (on loop). Rock in L9 for peak output at 600 kc.

*Use minimum capacity peak if two peaks can be obtained. Oscill- ator tracks 455 kc. above signal on all bands.

Critical Lead Dress: 1. Bus from "C" oscillator coil to range switch must be held to

length and dressed close to coil. 2. C30 (audio coupling capacitor to volume control) should be

dressed close to front apron. 3. A.C. cord and motor leads must be dressed away from phono

and F.M. jack. 4. Excess trans. leads to be dressed between trans. and rectifier

socket. 5. Keep R5, C16 bus (in grid circuit of 6SA7 tube) as short as

possible. 6. Dress C28 (in plate circuit of 1st A.F.) close to socket. 7. Keep R15 (grid resister) C34 (coupling capacitor of output

tube) close to socket. 8. Keep C23 (tone compensating capacitor) close to back apron. 9. Keep R15, C48 (in tone compensating circuit) close to front

apron. 10. Dress green lead from osc. coil to trimmer close to oscillator

coil. 11. Dress cable from phono. socket to phono. switch up away from

base. 12. Dress red A.C. leads away from I.F. trans. and 6S07 socket. 13. RF choke in plate of 6SG7 must be dressed toward back apron.


78 RCA MOD 211K,

Ch.RC-571

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RCA PAGE 13-79

RCA MFG. CO., INC.

Calibration for Alignment.- A calibration scale is attached to the tuning drum. The correct setting of the gang, in degrees, for each alignment frequency is given in the alignment table. Check the position of the drum, making sure that the 140 degree scale mark is directly above condenser shaft wi.en the gang is at minimum setting.

Pointer for Calibration Scale.- Improvise a pointer for the calibration scale by fastening a piece

of wire to the chassis, and bend the wire so that it points to 0 degree mark on the calibration scale when the plates are fully meshed.

L5-eOTT6K LKl-TOP 459 KC.

To C50 L 7-5 TUBE PLATES

TO C49& 5 -IO TU&E

PLATES

+B

RECT.

Test-Oscillator.-For all alignment operations, connect the low side of the test -oscillator to the receiver chassis, and keep the output as low as possible to avoid a -v -c action.

Electronic Voltmeter.-The electronic voltmeter in the Chanalyst or VoltOhmyst provides an unexcelled. output indicator. It should be connected to the AVC bus, and the test -oscillator output adjusted to produce several volts of AVC.

ROW. T2 BIUt

GRO -RED TR

Below.-Speaker Wiring Diagram.

HIGK FREO. SPEAKSR

LOW FRED SPEAKER

VOICE COIL

NEUT ) COIL r

MODEL 211K, Ch .11C-571

POWER SUPPLY RATINGS 105-125 volts, 50-60 cycles 140 watts 105-125 volts, 25-60 cycles 140 watts

29K -K2

External Antenna.-When using an External Antenna, Peak C7 for max. output on a station in the 31 -meter band.


side of the test oscillator to-

Tune test ma. to- Turn radio

dial to- Adjust the follow - ing for maximum

peak output-

1 I-F grid


455 kc Quiet Point

on "A" Band

L-11 and L-12 (2nd I -F Trans.)


.01 mfd. L-9 and L-10

(1st I -F Trans.)

3

Yellow loop lead in series with

200 mmf.

1,500 kc 1,500 kc (180.0)

"A" Band C-27 (osc.) C-12 (det.)

4 600 kc 800 kc (30.5°) L-15 (osc.) "Rock

5 Repeat teps 3 and 4.

6

Antenna terminal (A) in series with

47 mmfd. (link open)

6,100 kc 6,100 kc (161°)

"B" Band

C-26 (osc.) C-13 (det.) Rock C-2 (ant.) Gang

7 15.2mcC 15.2 me 165°)

sand

C-25 (osc.) C -il (det.) Rock C-8 (ant.) Gang

8 11.8 me 11.8 me (52°)

"C" Band

C-7 (ant.) C-14 (det.) Rock

Gang 9 Repeat teps 7 and 8.

10 9.5 me 9.5 me (87.5°)

SIM -Band

C-30 (osc.) C-5 (ant.) Rock

C-18 (det.) Gang

11 Fasten chassis in cabinet, close ant. link, alijust indicator to left-hand end of dial scales with gang closed.

12 Radiation loop

consisting of two turns of wire 18 inches in '

diameter located 4 to 6 feet

from receiver

1,500 kc 1,500 kc

signal "A' Band

Cl - (ant.) on loop

13 600 kc 600 kc signal

' A' Band R (osc.) g


Use minimum capacity peak if two peaks can be obtained. Note: Oscillator tracks 455 kc above signal on all bands,

Push Button Adjustment. The station push buttons connect to separate magnetite -core oscil-

lator coils and separate antenna trimmers which must be adjusted for the desired stations. Use an insulated screwdriver or alignment tool such as RCA Stock No. 31031. Allow at least five minutes warm- up period before making adjustments.

In the event that the receiver is to be used with an external antenna use one or two feet of wire (as an antenna) to ensure sharp peaking during the final adjustment procedure. For loop operation, the link should be strapped across terminals on back of set. In either case the procedure is as follows:

1. Make a list of the desired stations, arranged in order from low to high frequencies.

2. Turn the range selector to "A" band, and manually tune in the first station on the list.

3. Turn range selector to "PB" position, push in station button No. 1 (extreme left). Then adjust the No. 1 oscillator core to receive the station.

4. After oscillator core is set correctly, adjust No. 1 antenna trimmer for maximum output.

seo To' T40 TO 1430 I 610 TO 1260 540 TO moo KC' KC I KC 1030 KC

TR1 PA SCREWS ® ® I ® 0 ® CRE ROODS

I,

e P 2

P P P

Clockwise adjustment of cores and trimmers tunes the circuits to lower frequencies.

5. Adjust for each of the remaining stations in the same manner. 6. Make a final careful adjustment of the oscillator cores and an-

tenna tritnmers. On the 880 to 1.600 kc push-button, the higher frequency stations

may be received with No. 1 oscillator core either in or out (oscillator frequency either 455 kc below or 455 kc above the station frequency). The adjustment with this core in its out position (oscillator frequency 455 kc above the station frequency) is the correct one.


80 RCA

MODELS V-215,V-221,Ch.RC-564; RCA MFG. CO., INC. V-219,Ch.RC-564Á;V-225,Ch.RC-564B

FOR -PUSH-BUTTON DATA SEE MODEL V-210 MODEL PICKUP V-219

POSH BUTTON AOJYSTMlNTS

CHASSIS AMINNA-MOONO TERMINAL BOARD

M MTILLv. JAG«

POWER CORO

CHASSIS SNIPPING SCREWS

SPAC

RECORD SUPPORT

RECORDS

SISHLÓPPIN6CK

¡T RECORD SUPPORT

SPINDLE TURNTABLE

/CCORD SUPPORT f MOTORBOA RD

'. TWO SNIPPPIryNG BOUS _` ( WITH RED HEADS .. . SNIPPING

KOCN TTTAOTORS

RECORD WELL

MOTOR \.------ ----- -r3HIPPI NG BRACKET

BOTTOM COVER

RECORD WELL LOOP ANTENNA SPEAKER RECORD STORAGE COMPARTMENT

c

A

Model V-225

RECORD SUPPORT

OFF

SPEECH FULL POWER -BASS

TONE CONTROL

R -BIB

CHASSIS MOUNTING BOARD

CHASSIS I PICKUP TURNTABLE MOTORBOARD

'SPINDLE

{ - ..1.1",ç

:l - - ri -;:

RED BRACKET AND TWO SCREWS.

TWO SHIPPING BOLTS WITH II RED HEADS

RECORD CHANGER SLIDE MECHANISM

(Models V215, V221)

-uo An adjustment is located on each of the rear legs so that the

angle of the cabinet may be adjusted to allow the record changer to slide out easily. Adjust so that the changer rolls out of the cabinet to a gradual sto at the front edge of he opened door.

RECORD SUPPORT

PICKUP AREC

MODELS V-215 V-221

MOTOR BOARD

PICKUP

INDEX LEVER

TURNTABLE SWITCH

START -REJECT BUTTON

AUTOMATIC PHONOGRAPH RP -161 for V-226 Type Pickups (2) Crystal

Record Capacity . Fifteen~10-in of Twelve 12 -in. Power consumption turntable - drrve motor.. (14 )watts Power consumption cycle motor (38) watts

/ PUSH BUTTONS

®g ®g FUL BASS

TREBLE TONE CONTROL

DIAL

F.M

/ PHONO. TEEV.

RADIO

VOLUME SERVICE SELECTOR CONTROL CONTROL

Ao

LOUD SOFT

LINK

G L1

ELECTRIC TUNING No. of Stations

1

2 2 1

ELECTRIC C TUNING

ANN

MANUAL TUNING RANGE' CONTROL CONTROL

R-794

For all Models

TO 51 (7) T0 52 ( I1)

C3

SOCKET

PLUG

PICKUP.

MOTOR

LOOP AND PHONO- MOTOR CONN'S V 219 (RC 564A)

External Antenna.-For best reception on "C" band with an ex-

ternal antenna, peak the trimmer on "C" antenna coil for maximum

output on a station in the 31 -meter band.

PUSH BUTTON ADJUSTMENTS \,,,eaeeeef

6 5 4 3 2 1

CHASSIS

ANTENNA -GROUND \ TERMINAL BOARD r

POWER CORO G T

1 K.A

TP{CICUP OTORBOA1iD I

TURNTABLE. .

CTC i- .. SPINDLE_ m-

- -.i. r. ; - -__-

MOTOR

LOOP ANTENNA

TO PHONO

F.M. & TELEV. JACK

SPEAKER

RED 'BRACKET AND TWO SCREWS

TWO SHIPPING BOLTS WITH RED HEADS

Removing Mechanism (a) Unplug the power cord and pickup cord. (b) Reach in behind the motor board and lift up the two metal'

tabs which act as stops and prevent the record changer from sliding out.

(c) Loosen the cable clamp holding the two cables in place. (d) Pull the record changer dut of the instrument,

RECORDS SPINDLE

540-1,080 kc 610-1,250 kc 740-1,430 kc 880-1,600 kc

I-

RECORD SUPPORT 7 TURNTABLE SWITCH START -REJECT LEVER R-801

R-790

RECORD SUPPORT

MOTOR BOARD

PICKUP ARM

PICKUP

PICKUP REST

Models V-215, V-219 and V-221


RCA PAGE 13-81

MODELS V -215,V -219,V-221, V-225

^

_ ó _ ]J ó23of- W

Nóº w Jh J1Ñ3 OccNFV

Wd

Q*Q WJOU h = ZXj Jw9 ó

200 t Zr:

o = u>(0ÿ;

(Ya ó Ñ yy

l. N

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,, ,,w II

w l l 1 .. KLY.

"""1 H ° p 19 0? Nog N F NJ+NNJIILIGC±° o. UN V (919191919191919N ó - C) - N m d u119r` aD_ 0`

OOO 00e mma


82 RCA

MODELS V -215,V -219,V-221,

V-225

POLICE

2.3 2.5 . 1 1

RCA MFG. CO., INC. AIRCRAFT 90M AMATEUR

3.0 t

55 60 70 I ! 1 1 1 1 1 1.1 l l t 1

31 METERS

9.3 HAVANA TOKYOMANIIA ANKARA LONDON BUENOS N' KONG BERLIN LISBON

60 M AIRCRAFT 49 M

3.5 4.0 5.0 6.0 sUÑtÉ GH

t 1 1 1 11 1 1 1 t41 J L 1 1 L1 1 1j 1 1 11J Ll 1_l_.1 t t.

80 100 t t l.1 L11 1 1 1Lta 1

10 II 1 l 1 1 J 1 t t

120 140 160 1 ! 1 J 1 t t

25 METERS AMATEUR 19 METERS

TOKYO CKING LONDON 1

2N' DELHI

SAIGON BERLIN 13 14 15 H. KONG LONDON BERLIN

4(.111 1 1 1 1 1 L / t l 1 1 1 t

The dial scale drawing shown is a full size reproduction. It can be used as a direct substitute for regular dial scale'in ali.


Output Meter Alignment. -If this method is used, connect the meter across the voice coil, and turn the receiver volume control to maximum.

Test -Oscillator. -For all alignment operations, connect the low side of the test -oscillator to the receiver chassis, and keep the output as low as possible to avoid a -v -c action.

Electronic Voltmeter. -The electronic voltmeter in the Chanalyst or VoltOhmyst provides an unexcelled output indicator. It should be connected to the AVC bus, and the test -oscillator output adjusted to produce several volts of AVC.

Calibration Scale. -The glass tuning dial may be easily removed from the cabinet and temporarily attached to the chassis for quick reference during alignment. In the event that only the chassis is returned for service, and the cabinet with its tuning dial is left in the customer's home, the full size calibration scale printed in this service note can be used as an accurate and convenient substitute for the regular dial.

Using Tuning Dial. - '1. Remove the dial glass from the cabinet. 2. With gang at full mesh move the pointer to a point (1/16)

inch to the left of the reference mark at the left hand end of the dial backing plate.

3. Place the glass dial under the pointer so that the extreme left scale graduations coincide with the pointer. Use scotch tape to hold the glass dial in place.

Using Dial Scale Printed In This Service Note. - Follow the procedure above, substituting the dial scale printed in

this service note for the glass dial in the cabinet.

LB A-osC. 600 KC.

Re7 ß6 C21 C 21A

A

C7-GOSC (¡¡¡3(Mc O C -ANT. v C8-213-OSC. 5%

'j - g .9 5MC, 6.1 MC. 6SQ/

C 94 C24 0 C49 L11- BOTTOM

C9-AOSe. L12- TOP 1500 kC. /455 KC . / /

rThSKL C2- B ANT. C5-t.-ANT.6.1 MC. 15.2 MC.T

L9 - BOTTc L10 -TOP

455 KC

FM - TELEV L -111 -.PHONO- JACK JAC K.

Steps Connect high

aide ofing test omc. to-

Tune test Osc to- Turn radio

dial to- Adjust the follow -

for maximum peak output -

1 I -F grid


455 kc "A" Band 540 kc

L12, Lll (2nd I -F Trans.)

2 in seriesries with series .01 mid.

L10, L9 (1st I -F Trans.)

3 Yellow loop lead in series with

200 mmf. (link closed)

1,500 kc "A" Band 1,500 kc C9 (osc.)

4 600 kc "A" Band

600 kc L8 (osc.)



47 mmf. (link closed)

8.1 me "B" Band

6.1 me C8 (osc.)* C2 (ant.)

7 lb 2 me "C" Band 15.2 me

Cl (oac.)* C6 (ant.)

8 9.5 me "C" Band

9.5 me C4 (ant.)


10

Install and connect chassis in cabinet, with link closed. Tune in a radiated oscillator signal at 1,500 kc and peak the "A" band ant. trimmer C3 (on loop). Rock in L8 for peak output at 600 kc.

Use minimum capacity peak if two peaks can be obtained.

Oscillator tracks 455 kc above signal on all bands.

Critical Lead Dress 1. Push button, R.F. and oscillator leads should be separated as

much as possible to reduce degeneration on push button reception.

2. R.F. choke in plate circuit of 6SG7 should be dressed towards the back apron.

3. Dress green push button lead under clamp and away from "C" band series capacitor.

4. Dress heater leads away from grids and diodes.

5. Dress phono. cables up and away from all wiring. 6. Dress all excess leads from transformer towards back towards

transformer. 7. Keep output plate leads short and dressed close to chassis.

8. Dress green lead from 6SA7 screen to electrolytic down close to chassis.

9. Dress "C" band coil lead from oscillator coil to range switch down towards green lead.

10. Keep yellow loop lead clear of all wiring. 11. Dress ground bus of large electrolytic away from mounting lug.

12. Remove all excess slack from pilot light assembly and dress it close to chassis base away from volume control.

13. Dress oscillator grid capacitor (56 mmfd.) up and away from the screen and plate of 6SA7 socket.

14. A -C leads to "off -on" switch should be kept away from tone control cable to reduce hum.

15. Peaking coil should he dressed away from R -F grid resistor to reduce degeneration in R -F stage.

16. Dress oscillator push button lead in weld clamp on front apron away from 220 mmf. series condenser.

17. Keep all leads away from Phono. -FM jack to prevent audio oscillation and hum. Dress underneath the shield provided.


RCA PAGE 13-83

x¿ 00 dd

J aN- EY <v) LL -

N

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co

ocª

I

{I

RCA MFG. CO., INC.

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I 11=11ó --mow d0

L)911 e N

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.140

MODELS 516,517 Chassis RC -1001C

S

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ßI ti N 1" d


84 RCA MODELS 526,527 Chassis RC -1001E

LOUDSPEAKER (RL -86-A3)

V Ce Impedance

POWER SUPPLY RATING

RCA MFG. CO., INC.

5 -inch electro dynamic 4.0 ohms at 400 cycles

105-125 volts, AC 50 or 60 cycles, or DC 25 watts

PRECAUTIONARY LEAD DRESS. - 1. Dress the power cable to switch on the volume control

close to the chassis and away from all grid and diode leads and condensers.

2. Dress capacitors in the 12SQ7 grid circuit away from all

wiring.

3. Green and black phono wires should be twisted and dressed away fròm other parts and leads.

4. 50L6 -GT filament wires should be dressed to rear of chassis and away from the second I -F transformer leads.

5. Dress brown lead from second I -F transformer to 12SQ7 away from power cable.

6. Dress wire to No. 1 grid of the 12SA7 away from pilot lamp leads.

7. Dress wire from loop to variable condenser away from chassis.

8. Dress all capacitors, leads, etc. which come close to oscillator coil rigidly and as far as possible from it.

C21-O0C. C22-050. 10 MC.. 000 KC.

C IS -ANT I S00 KC.

C 1 O5C. 1600 KC

R7

to

O ANT

L6

ANT COIL

1ST.I.0TRANS c7 -CO

465 H.C.

e` 1

4X

C 25 ANT. 10 MC

2140.I.R TTNII( CO -CIO 445 KC.

( 600 KC.)


LI LOOP

14

_ C 23

Sc

oSn C20 o-S22.61

C15 3-25

CI .035 I

180-250

TOT

FREQUENCY RANGE

Broadcast Band 535-1,720 kc Short Wave Band 8.9 mc to 12 mc.




Tune test-osc. to-

Turn radio dial to-

Adjust the fol - lowing for max. peak output-

1 12SK7 grid



CIO, C9 2nd I -F

Transformer

2 12SA7 grid


C8, C7 1st I -F

Transformer


47 mmf. 10 mc* 10 me 1

218 (coca** (ant.)

4 Antenna term. in series with 200 mmfd.

1,600 kc 1,600 kc C14 (osc.)

5 Radiation

Loop 1,300 kc Resonance on Signal C15 (ant.)

Radiationon Loop 600 kc 600 kc

C22 Osc.

* It is recommended that this step be repeated using a received station of known frequency.

** Use minimum capacity if two peaks can be obtained.

CONVERSION RAIN SOX -I IX I- 100X-06X--SOX

(Coo- 455 KC.) (455 KC.) (455 KC) (435 KC.) (400.v)

RI 2.000

L4

c261 160 S

125A7 1£' OCT ec OSC.

RB 220,000

12 5K7 I. F. AMPL.

90 V. On

C2+ ©T © 0.1 I

90V. soil pz, 30

112'1.F TRANS

C24

0 0 2 `O I.F TRANS

I wE 455 K. C- 455 KC 56 su6-

T i r'-- ,11 I ó ó I

GR N C 9

C2/ 5V' Cl y 11 75-160 1 u

(GOOKC) 75-160r g g y- T o ó 160"tor V Bn al 0 8n i 19ná ó19n

(9ÑC.) 1 + aspi L _Jca

;') 75 1443 y

SA.C144 1c19 sr° i 3-25r ó

R' -10V. MAX.AVC. VOL TAGE Ì

If 5127 27.f. DET. A.F &.A.V.C.

A

C22 31e- aor

R2 3.3 HEG:

19/KEN

C10 75-160 =

IiCN I I

- J -1 I

-_ -Y IC12. .2 120 K 0

** 2II 1C18 T .01

VOL. CONTR. 500,000.1 STOP AT 50,000 n

L PHONO - JAC K ó7i

C25 I /o 00

52 (REAR VIEW) SHOWN IN

BROADCAST POSITION

1-

R4

APPROX. GAIN IOX DATA USING

(400...) RCA RIDER C NANALYST_

SOL(GT OUT PUT

220,0°0

R5 470,000

RS 4.7 MEG.

ICs -.02

3V BIAS FOR -r+ GAIN DATA

477 CHASSIS GROUND

1 COMMON WIRING INSULATED FROM CHASSIS

VOLTAGES SHOULD HOLD WITHIN * 20% WITH 117 V. AC. SUPPLY.

* MEASURED WITH CHANALYST OR VOLTONMYST.

117V. e AC -OC. a

35F5GT RECT. c6 FIELD

4506 ---obööòoo'

C16 + 30 IJ MFD.

C17 + 50 Ll

MFD.

b r 35ZSGT" SOL 607 12 SA7 125K7 12307

a 2 3

l4DO10IS01 E)-4. (RC

©John F. Rider


RCA PAGE 13-85

6 ó J

RCA MFG. CO., INC.

TU

DRIVE WNIaL

MOTOR

NEEDLE PACKAGE NOLOER

SPINDLE

PICKUP ARM

PICKUP

NIMEOLS

REST \

scREw

CUP FOR USED NCEDL ES

POWER OUTPUT Undistorted Maximum

0.9 watts 1.2 watts

Output Meter Alignment.-Connect the meter across the voice coil. and turn the receiver volume control to maximum.

Test-Oscillator.-Connect the low side of the test -oscillator to the receiver chassis, through a .01 mfd. capacitor, and keep the output as low as possible.

Phonograph Motor Service Data:- The phonograph motor is of the self starting synchronous type and

operates the turntable through friction drive between the motor drive spindle and the rubber tired idler on the rim of the turntable.

The motor should be lubricated once or twice a year by placing a few drops of S. A. E. 20 (or equivalent) on the turntable spindle and saturating the oil retaining felt pads on the motor shaft with S. A. E. 10 oil. Caution-The motor drive spindle and the rubber tire on the idler must be kept clean and entirely free from oil and grease at all times.

Power Supply.-Although this model employs an ac -dc chassis, it is not suitable for use on d.c., as this would damage the motor.

FREQUENCY RANGE

INTERMEDIATE FREQUENCY

PILOT LAMP

MODEL R -560-P Chassis RC -517F

540-1,650 kc

455 kc

PHONO RADIO

10) FULL. OFFle LOUD \ SOFT IFULL\

'MELLOW MELLOW VOLUME PHONO- RADIO \TUNING

CONTROL POWER -TONE CONTROL CONTROL

1-Mazda No, 51, 6-8 'tufts, 0.2 amps.

POWER SUPPLY HATING 105.125 volts, 50 cycles 55 watts 105-125 volts, 60 cycles 55 watts

LOUDSPEAKER (11L -81B-4) Type 5 -inch P.M. V.C. Impedance 4 I,hms at 400 cycles



Tune test-osc. to-

Turn radio dial to-


output

1


.01 mfd. 455 kc


end of dial

L8 and L9 2nd I -F

transformer


.01 mfd.

L6 and L7 1st 1-F

transformer





Frequency C23 (ant.)


ANT. TO GRID CONY. GAIN II

0.4X I

O.At( I

10X (600 KC.)-+ 100E(600- 45311C:).1. (455 KC.) .F -150X (455 KC.) (455Kr.) 40X (400aV)---1 1,, MEASURED WITH 5V. FIEF -D F)IA i -

12SA7 125,K / 12SQ7 1ST. DET. _ OSC. 1.F 2ND. DET,AF. &AVC,

LE LOOP

Lt

C81 C25C22 cl 3-1o7- -4-5c5

e

Loo P

RI

t2 M

O .'

º 7- V.

8o v. -

c, C26; O 'C27 100, =07ó='100

A~J `--p r'YS

L6 L7

610. 8A J

c C28) l20!

A t

YEL

Ce O.I

R13

-BV. (600KC -9v. (1500 K -)

3V. BIAS 4- We FoR GAIN }i - 220 M if>r DATA 4 - Top VIEW

C2E O5CC.R ¡ 1560 K

C 23 -ANT 1300 KC.

C24

C 22

CTS 3-10

C24 Z5-170

VOLTAGES SHOULD HOLD WITHIN * 20% WITH 117 V. AC. SUPPLY.

at MEASURED WITH CHAHALYST 012 VOLTOHMYST.

at -17 V. APPROX. MAX. As/C.

I

,777 CHASSIS GROUND

COMMON WIRING INSULATED FROM CHASSIS (E-)

C31-o5C \ / 1560 KC

1/ L 1 LJ I\ LG -BOTTOM L,B_EOTTOM L7 -TOD L9 -TOP 455 KC. 455 KC.

C20 -L 220

2.2 MEG.

RIS 500 M VOLUME CONTR.

C5 OS1 I

RADIO-PHOtIOr TONE 2,,,POWER SWITCH. SHOWN IN OFF POSIT ION

47M> TTT

CI7

C181701.5 I, PICKUP 0.1

-- 405 5bME6.

SOLLG 1290 S[ 7 125Q7

4 E I 3 j

MOTOR

47M

51 FRONT

- 1

R9 120

F4 -14X (400 N) APPROX. GAIN DATA. USING RCA RIDER CH ANA LYST

50L6 GT OUTPUT

4v.

RIO 470M

35F5GT RECT.

DIAL LAM P

1C12 0.25

1

r &NWT

52 REAR

tIOV. C. 85V. .025

iRED

0. le" ó II4

1500 DIME

u

0

RID C14

500 NFL/

ßR'NI C13 Y 30 1 MFp,

t Pow ER r L SUPPLY

117V. 75w.

I


86 RCA

MODEL R -566-P RCA MFG. CO., INC.

Frequency Range 540-1,600 kc Intermediate Frequency 455 kc

POWER OUTPUT Undistorted 1.6 watts Maximum 3 watts Pilot Lamp (1) Mazda No. 51, 8.3 volts. 0.20 amps.

POWER SUPPLY RATING 105.125 Volts. 60 Cycles 65 watts



Tune test-osc. to-

Turn radio dial to-


output


.01 mfd. 455 kc


end of dial

L8 and L9 2nd I -F

transformer.


.01 mfd.

L6 and LI 1st I -F

transformer

S Ant. terminal in series with

200 mmfd. 1,600 kc Gan at



Frequency .C3 (ant.)


5OY6GT 4

50Y6 GT

R

C19 16 MFD

C2422

MFD

FIELD

750n RIO 330n.

C22 MF'D

125v.

-B

SIMPLIFIED SCHEMATIC VOLTAGE DOUBLER CIRCUIT -

117 V. AC.

PICKUP TURNTABLE RECORD SUPPORTS MOTORBOARD

612x 50x O.BX 200X IX

OOKC) (600-455KC) (455KC) (455KC) I (455KC)


e Cl 005

L2 LOOP

LI

®+ C3 T C4r 3-10 9.355

3V. 1 - FIXED BIAS 105 T}

GAIN DATA I

.

Sj220M 0140140 JACK

rr'ri

R2 22 M

x

W L3

MEASURED 125,47

1ST. PET.&OSC.

O .ß o',` o o o

095V.

I° `óó I

ITLA

iri;

9 V

W TH 3V. FIXED BIAS 12SK7

I.

IST. I.F. TRANS. 95

0pp

8o

1c,s - p ---

7A. 7A . I

iE - 12 V. 11500 KC) - B V. (550 KC)

RED I ('oCS-C6 yC7 3-10 31oT7.5-,70

L4 15 ER 7A m

*

C9 0.1

R4 82M

- ISV. APPROx MAX AVC

-/- Ce

156 CIDT

0

CATHODE CURRENTS (I) 12SÁ7 _ 11.0 MA. (2) 12SK7 - - 14.6MÁ. 13) 12501 - - - .4444. 141 35L6GT - 46.ÓMA. (S) TOTAL SECT. - - 74.0 MA.

LOUDSPEAKER (RL86B6)

.0015

PICKUP

r -

I.', r-- :

.

Kc ` _

---}--'-` t---3p----r-----

TURNTABLE SPINDLE

f--..7,.-... ..

;i MOTOR SPINDLE'!} -_ .

I ;IDLER WHEEL 1 _i-j" --`- tt'-

.:i- -

t /; t MOTOR ;7

MOTOR çj-a 1 CABLE¡ 1 TWO SHIPPING BOLTS `CONNECTOe7r WITH RED HEADS

CHASSIS r C ""--" HASSIS BOARD Ny; TWO CHASSIS BOLTS . r" %ICKUP LEAD

CONNECTION r11Y 7

RS VQL.CONTß

500 M

MOTO 32 ON MOTOR BOARD

FOUR CHASSIS BOARD SCREWS- OM,

4 -OX (400 ti )

12S O17 2ND. DET., AF., AVC.

© ,CI pMO 2TRANS 0 ND.I.F. 62V ©

A_A c 1pq,gT D1

FaI -odI á I120

A~L.a L! F -7A 7n _J

Type 5 -inch Electrodynamic V.C. Impedance 4 ohms at 400 cycles

R7 47 M

Y

GRO. CONN'^ VERTICAL *HI" TO THIS TERMINAL VERTICAL' 0" TO CHASSIS.

Rr--WV 600 l'n ú 330

5ÁS1 FIELD r 1C22 o

III I MF D. CC

I C19L r I . 2o 16 o1 MFD. MFD.

C24 .O1

12X (400 v)

R14 150

= C17

inII7V--AC

820

205 V.

C23 .05

iÓ

RII PILOT IS LAMP

P(,ú917Ñ) 1

35 L6 GT OUTPUT-

APPROx. GAIN DATA USING RCA RIDER CHANALYST

I(7V. 125 V.

BLU TI

1604

RED

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VC

[.M. 5P K'R

VOLTAGES SHOULD HOLD WITHIN !207. WITH 117 V. AC. SUPPLY.

* MEASURED WITH CHANALYST OR VOLTOH MY ST.

2iL467 ItsA7 It557 IL507

50Y6 GT RECT.


RCA PAGE 13-87

RCA MFG. CO., INC.

Model Mi -4803 Type Pt -16 Pickup - Low Impedance Voltage Rating of Motor - 105-125 volts AC

MAGNETIC

PICKUP

BLACK BLACK

-,;, a.

íh BLACK

,.. .......

IF SPLICE

Frequency - 60 cycles Power Consumption - 30 watts

PHONOGRAPH MOTOR

e e- ®e p_ 'eee.eeAleeeee

e\®`eeeeeeecee éeeeeeeece

,

Synchronous motor is adjusted for either 33 1/3 or 78 rpm

AUTOMATIC

SWITCH

Dimensions: Weight Shipping Weight Finish

MAGNETIC

PICKUP

BLACK

BLACK BLUE

MODEL MI -4810 This is the same as Model MI -4803 with TELEPHONE these exceptions: MI -4810 has no re- PLI1G aotor,L1; the frequency rating of the otor is 50/60 cycles.

BLACK

MODEL MI -4802 MODEL MI -4810

R-2

VOLUME

CONTROL

BLACK

REACTOR* SWITCH

R-1

18" x 15" x 9" high - 22 pounds - 37 pounds - Black Leatherette

SWITCH»

Pickup designed to match impedances from 60 to 500 ohms.

nn

' (MOO MOTOR 0e,

AUTOMATIC

SWITCH

R-1

I-2 L

POWER CORD

i,

L*

.« A.C. POWER

PLUG

I.-- i i

USED NEEDLE TURNTABLE CUP

SPEED SHIFTER

VOLUME CONTROL AUXILIARY SWITCH

NEEDLE SCREW

AUDIO CORD

VOLUME e COATROL

ELECTRIC STARTING TONE ARM PICKUP LEVER SUPPORT


88 RCA MODEL MI -4804 MODEL MI -4811

A. C.

POWER

PLUG

RCA MFG. CO., INC.

MODEL MI -4804 MODEL MI -4811 Type- PT -17

These two Double Turntable Phonographs are the same except that Model MI -4804 is for 60 -cycle operation only and Model MI -4811 is for 50 or

60 -cycle operation.

R -1

R-3

MIONOGAAPN M OTOM - -

FADER AND VOLUME

CONTROL

R-2 R-3 TELEPHONE R-1

Pickups are designed to match impedances from 60 to 500 ohms

MAGNETIC

PICKUP

a.

PLUG

1

( 00000 MOTOR

OÒOW

AUTOMATIC

SWITCH

SPEED SIUF FER

POWER TURNTABLE CORD

---J1 '

AUDIO USED NEEDLE CORO CUP

MAGNETIC

PICKUP

0000' MOTOR

eÒ0Òr

TONE ARM

SUPPORT

AUTOMATIC

SWITCH

NEEDLE SCREW

VOLUML CONTROL VOLUME ELECTRIC STATING AUXILIARY SWITCH CONTROL PICKUP LEVER

iADCR


RCA PAGE 13-89

ruCDELS MI-4816,1tI-4817, RCA MFG. CO., INC.

The MI -4836, 48i8 equipments are designed for regular Public Address use, while the MI -4817 is designed for Sound Truck (6 volt) operation. Standard, 78 rpm,

records may be played on the MI -48i6 and MI -4818. The

MI -4817 has provision for changing the speed of the

turntable to enable both 78 rpm and 33-i/3 rpm re-

cords to be played. A low -impedance (125 ohm) mag-

netic pickup is used, designed primarily to use

chromium (RCA orange or green shank) needles. The

output of the pickup is fed through o volume control

into a standard phone plug, or, for permanent con-

nection, the plug may be removed, and the wires

soldered directly to the amplifier input. CAUTION:

Connect only to the type power supply specified on

name plate.

SPEED $NO TER <MX

gen oNy)

NEEDLE SCREW

For adjustments of magnetic pickup, see data on Yodel MI -12700.

II LD NILUZE TURNTABLE CUP

AUDIO CORD

MAGNETIC

PICKUP

MI -4818

POWER RATINGS MI -4816 105-125 volts, 60 cycles 30 watts MI -48i7 6 volts, d.c. 35 watts MI -4818 1O5 -i25 volts, 50 cycles 30 watts Pickup Impedance 125 ohms Turntable Speeds ... MI -4816, 4818 ... 78 rpm

MI -4817...78 rpm and 33-i/3 rpm Dimensions(lid closed) 20" x 15" x 9" high Weight(Net)....22 lbs.; Weight(Shipping)....37 lbs. Finish Gray Wrinkle

Operation

To operate turntable - connect to proper power sup, ply, place phono. plug into amplifier input, place record on turntable, set the speed selecting mechanism to the proper position to correspond to the type record used (MI -4817 only), then pull starting lever toward the front of the case, place pickup on record, and regulate volume as desired. To stop turntable, lift Pickup arm, place it on the pickup rest, and the automatic switch turns the motor off. When transporting equipment, be sure the pickup arm is on the pickup arm rest.

BLACK

BLACK

PHONOGRAPH MOTOR

AUTOMATIC

SWITCH

VOLUME 0 CONTROL

ELECTRIC STARTING ONE ARM PICKUP LOVER SUPPORT G

DESCRIPTION Pickup and Arm Assemblies

ARM - Pickup arm only 98íi BACK - Pickup back 11548 COIL - Pickup coil 12541 MECHANISM - Comprising an armature and spring

assembly, one armature clamp and one damper

SCREW - Needle screw 12539 Motor Assemblies (MI -4816 á 4818 only)

MOTOR - 60 cycle motor for MI -4816 8989 MOTOR - 50 cycle motor for MI -4818 8990 TURNTABLE 11696 DAMPER - Turntable rubber damper and damper

plate 33704 MOTOR MOUNTING - Comprising 2 cup washers,

4 springs and i "C" washer 3398 STUDS - 3 motor studs 381.7

Motor Assemblies (MI -4817 only) ARMATURE - Motor armature 26188 BRUSH - Set of 2 brushes for motor 23515

SPLICE

REPLACEMENT PARTS

STOCK NO.

14115

DESCRIPTION

BLACK

BLACK

68^

VOLUME

CONTROL

TELEPHONE

PLUG

POWER

PLUG STOCK NO.

DIAL - Speed indicator dial 23512 ESCUTCHEON - Speed shift lever escutcheon 23534 GOVERNOR - Motor governor complete 26189 LEVER - Speed shift lever 235i3 MOTOR - 6 volt d -c motor 27684 POINTER - Speed indicator pointer 26i87 TURNTABLE 27685

Motor Board Assemblies BRAKE - Automatic brake complete with cover 9809 BOX - Needle box 439i KNOB - Volume control knob 4085 VOLUME CONTROL 12392 REST - Pickup rest 1.1.551

SCALE - Volume control knob scale 3986 MOTOR BOARD MOUNTING - Comprising i bolt, i

top spring, i bottom spring, 2 cup washers, i "C" washer and i nut (MI -

4816 -4818 only) 32069

CABLE - Power cord and plug 13524


90 RCA

MODELS MI -4829, ICI -4829A RCA MFG. CO., INC.

Figure 1-MI-4829 Height (with cover) 8¡'z inches Length 219 inches Depth 18 inches Weight-net 32 pounds

General Description The MI -4829 and MI -4829A are portable turntables for

playing of laterally cut records up to 16 inches in diameter, at either 78 or 33/ r.p.m. They use a governor type motor which is adjustable over a wide range of speed, and operate on 105/125 volts 50 to 60 cycles. An output jack and shielded cable is provided for connection to an external amplifier. The MI -4829 is equipped with a high impedance crystal pickup. The MI -4829A uses a low impedance magnetic pickup for connection to 250 -ohm amplifier inputs. Both have an integral volume control for controlling the input level to an external amplifier.

MI PICKUP R-1 R-2 C-1 4829 Crystal 500,000 100,000 0.0025 4829A I?agnetic 600

/05/025 VAC. SO/6o Cy, 1)

Operation 1. Plug pickup cable into motor board receptacle. 2. Connect shield lead to ground on the proper amplifier,

and red lead to "high" side of amplifier input. (To sleeve and tip of telephone plug respectively,'if used.)

3. Set speed selecting mechanism to the proper position, corresponding to type of record used.

4. If 16 -inch records are to be played, first place special 16 -inch flocked disc on the turntable.

5. When carrying records in cover, place 16 -inch flocked disc between records and clamping disc to prevent records from warping.

Speed regulation:-Check speed in the 78 r.p.m. position by placing a piece of paper between a record and the turntable with the paper protruding beyond the edge of the record, and counting the number of revolutions of the turntable per minute while playing the record.

Should it be necessary to reset the pointer such that 78

r.p.m. can be obtained near the center of the "F -S" scale, remove motorboard from cabinet and take off the turntable first removing the "C" washer from the turntable spindle. Set pointer off scale approximately % inch beyond the "F" mark. Loosen slightly the pointer arm screw and nut that clamps it to the slotted cam shaft. Then with a screw driver, adjust the cam such that the minimum radius of the cam is against the governor adjustment ball bearing. Tighten the pointer arm screw and nut in this position.

No separate adjustment is_ provided for 33/ r.p.m. since

with the speed properly adjusted for 78 r.p.m. records, the

speed for long playing records will be. 33/ r.p.m. when

the control lever is set at 33/.

The crystal pickup:-If failure occurs, no attempt should be made to repair the unit, but a new replacement crystal unit should he installed.

For adjustments of the magnetic pickup, see data on Model MI -12700

CABLE & PLUG

REl)

circoMCïTO2

5NIEI.

R -Z

R-1 o

z.9) LIEU) --` C

C

DESCRIPTION

MOTORBOARD ASSEMBLIES MI -4829 AND MI -4829A

STOCK No.l

Capacitor-.0025 mfd. (MI -4829 only) Connector -3 -prong female for input cable Control-Volume control (MI -4829 only) Control-Volume control (MI -4829A only) .

Cord-A.C. power cord Disc-Disc for 16 -inch records Escutcheon-Speed change escutcheon Escutcheon-Speed indicator escutcheon Knob-Volume control knob Motor-Turntable drive motor Pointer-Speed change pointer Pointer-Speed indicator pointer Resistor -100,000 ohms- 4 watt (MI -4829

only) Switch-Motor switch Turntable-Turntable complete

CARRYING CABE

Case-Carrying case complete Catch-Carrying case catch Poot-Pelt foot for carrying case Handle-Carrying case handle Hinge-Carrying case hinge complete ..

34459 36183 36182 37047 32098 371'6 23511 23512

7960 36180 23513 26187

3252 28322 36181

36184 36119 36118 36199 36200

DESCRIPTION

PICKUP ARM ASSEMBLY MI -4829

Base-Pickup arm base only Cable-Pickup cable Nut-Nut and washer for pickup arm base Pickup Unit Cartridge Ring-Retaining spring for pickup arm shaft Screw-Needle screw only Shaft-Pivot arm and shaft Shell-Tone arm shell Spring-Pickup arm spring

PICKUP ARM ASSEMBLY MI -4829A

Arm-Pickup arm with pivot arm and pickup spacer-less pickup unit, collar, pivot shaft and bearing, and base assembly ..

Base-Base assembly with bottom bearing Collar-Pivot shaft collar Pickup-Pickup unit complete Shaft-Pivot shaft and bearing

STOCK No.

36139 36141 33122 36427 34311 33529 36140 36137 36138

33577 33578 34679 32357 33579


RCA PAGE 13-91

MODEL DII-12754

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92 RCA

MODEL MI -12754 RCA MFG. -CO., INC.

General Description The MI.12754 Sound Truck Equipment consists of a com-

bined 25 watt amplifier -turntable assembly, two permanent magnet speakers and an MI.6228A microphone. This equipment may be used on a 6 -volt D -C supply, or 110-vòlt A -C supply by merely changing the power supply cord and associated plugs. The A -C and D -C cords are supplied with the equipment. This equipment may be used for permanent or mobile installations.

Input.-There are two input channels with separate volume controls. Each channel has provision for high impedance phonograph or microphone input, and both channels may be used simultaneously.

Channel No. 1 has provision for either microphone or phonograph input. Microphone input to this channel is through the receptacle at the rear of cabinet marked "MIC. 1." Phono. input is either through the jack at the rear of the cabinet marked "PHONO." or through the receptacle marked "MIC. 1." Proper connections to the input plug can be determined from the schematic diagram. Both microphone and phono. pickup may be used simultaneously on this channel if provision is made for controlling the volume of the pickup separately.

The phono. pickup located on the cabinet is permanently connected to channel No. 2. If it is desired to use channel No. 2 for a microphone, then the microphone should be connected to the receptacle marked "MIC. 2," located at the rear of the cabinet. Both microphone and phono. cannot be used simultaneously, due to a possible difference in sound level, because no provision is made for controlling the volume of either one separately.

If additional phono. pickup is desired, for a -c operation the RCA R-93 or MI.4816 portable turntable phono. pickup may be used. For 6 -volt d -c operation, the MI.4817 portable turntable may be used. For additional microphones, an RCA MI.4036 or an additional MI.6228A microphone may be used.

Due to the fact that the signal level of each channel is controlled electrically and not in the signal circuit, remote control is possible at any point removed from the amplifier at a distance not exceeding 2,000 ft. The remote control unit is available as a separate unit and is connected to the amplifier by a cable and plug which fits into a socket provided on the rear of the main amplifier case. The remote mixing controls available are: MI -4123 which comes without cord or plug for use where the amplifier and wiring are permanently installed. MI -4123A which is identical to the MI.4123 except that a 30 ft. five conductor cable with plug attached, is included in this assembly. A 50 ft. extension cable with male and female plugs is stocked as MI -4.685. MI -45, five conductor cable, is recommended for connecting the remote control to the amplifier. No. 18 R.C. wire may be used.

Two output receptacles are provided at the rear of the amplifier case. Output impedances of 4, 71/2, 15, 60 and 250 ohms are available.

BOTTOM VIEW OF PLUG

REMOTE CONTROL UNIT MI -4123A

BOTTOM VIEW

@PONS

Microphones Two recommended types of microphones are available for

use with the MI.12754 amplifier. For orchestrations, and where close talking is not necessary, the RCA type MI -4036 junior velocity microphone will give excellent results. The MI.4036 will operate into inputs of either 50, 250 or 15,000 ohms impedance, and therefore, by making the proper connections to the microphone transformer, the microphone can be used for the High Impedance input. For average announcing purposes the MI -6228A Aerodynamic Microphone is excellent. The output impedance of this microphone is 40,000

K 841827

Remote Control Wiring

ohms. Thus it may be directly plugged into the microphone input jack on the amplifier.

Stands for the MI.4036 microphone are available as follows:

Floor Stand MI -4068-A Table Stand MI -4065-A

Stands for the MI.6228-A are available as follows: Table Stand MI -6227

000 fl ""V

.005 MFD

VIBRATOR SOCKET

TWISTED PAIR

LESS THAN 1 n

TWISTED PAIR

-C> 9

Schematic Diagram of Vibrator Supply

II II

0.5 MFD

LESS THAN 1

---272n WHOLE WINDING

N.

M-417362


RCA PAGE 13-93

RCA MFG. CO., INC. MODEL MI -12754

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PAGE -13-94 RCA

MODEL

grade sufficient. and net

desired.

rear front

control trol

as

is

counter position,

ing volume " " "MUSIC

the duction, scratch

to

MI -12754 RCA MFG. CO., INC.

The phono. motor should be oiled occasionally with a light The motor speed should be 78 r.p.m. and may be checked of high quality oil, a few drops each month being by placing a piece of paper between a record and the turn -

The oil wick is located near the turntable spindle, table, with the paper protruding slightly beyond the edge of is accessible through art opening in the top of the cabi the record, then counting the number of revolutions of the

located under the turntable. record per minute. The correct speed may be obtained by adjusting the speed reeulating lever.

Operating Instructions No. 1. -Set up amplifier assembly and speakers in location stop turntable, snap switch to "AC" position. A -C opera -

tion is the opposite. No. 2. -Plug a -c or d -c female plug into receptacle u n The input receptacle marked "Microphone No. 1" may be

of cabinet. If power supply is to be d -c, the switch at used for either microphone or additional phonograph input left of cabinet should be thrown to the d -c position. if the input plug is: connected as shown in the schematic

No. 3. -If remote control is to be used, plug in remote diagram. at the rear center of the cabinet. If no remote con. Care twist be taken when plugging the speakers in, to

id to be used, plug in dummy plug supplied with equip- match the correct speaker impedance to the correct output ment. impedance. Each speaker supplied with this unit has 15

No. 4. -Plug in microphone No. 1 or microphone No. 2 ohms impedance, and should be plugged into the 7.5 ohm desired. terminals of the receptacles marked on the rear of the ampli -

No. 5. -Turn "ON-OFF" switch to the "ON" position. fier case when both speakers are used. The assembly screw A pilot light on the control panel shows when the amplifier on the speaker plug shows the proper indexing point for

"ON., speaker impedance. Other speakers than those supplied may be used with this No. 6. -Turn both volume controls to the complete equipment. However, care must be taken that the proper -clockwise position, but do not snap to the remote impedance match is kept between the speaker and the ampli - unless remote control is to be used. fier output. If only one speaker is desired to take the full

No. 7. -Turn tone control completely clockwise. output of the amplifier, an RCA MI.6260 speaker may be No. 8. -Bring volume up on the channel desired by turn- used. This speaker provides large coverage with high effi-

the volume control slowly clockwise until the desired ciency, and is ideally suited for outdoor mobile or permanent level is obtained. If microphone is to be used on installations.

SPEECH, " snap " MUSIC SPEECH " switch to the IMPORTANT( The clip of the d -c black power lead must SPEECH " position. If phonograph is to be used, snap always be connected to the GROUND aide of the battery, -SPEECH" switch to the 'MUSIC" position. irregardless of whether (+) or (-) side of battery is No. 9. -Turn tone control slowly counter -clockwise until grounded. The vibrator should be inserted in its socket so

desired tonal quality is obtained. For phonograph repro- that the (+) sign marked on the vibrator is toward the the tone control should be turned until needle arrow on the metal cover if the (+) side of the battery is

is not objectionable. grounded to chassis. The (-) sign on vibrator should be No. 10. -To use turntable, when equipment is connected toward the arrow on the cover if the (-) aide of the battery d -c supply, snap phono. switch to DC" position. To is grounded to the chassis. STOCK DESCRIPTION STOCK

30314 12725 12694 12635 30303 4838

30852 4858

4886 12484 32019

32021 32018

32020 4358

10907 3848

30187 32058 32057 32059 30189 30197 30731 30654 30196

13204 3078

30436 12759 30685 30787 30650 30225 8084 3252

30493 30651 30784

30648

30181 30162 32055 13318 31251 14274 30195 32024

30247 5228

30198

AMPLIFIER ASSEMBLIES Cap -Grid cep for Radiotron Capacitor -150 mmfd. (C-25, C-26) Capacitor -220 mmfd. (C-29, C-30) Capacitor -.001 mfd. (C-24, C-27) Capacitor -0035 mfd. (C-19) Capacitor -.005 mid. (C-8) Capacitor -.005 mfd. (C-31, C-32) Capacitor -.01 mid. (C-7) Capacitor-.025 mfd. C-17, C-18, C-22, C-23) Capacitor -.05 mfd. (C-1, C-4, C-6, C-9, C-12, C-14) Capacitor -.25 mfd. (C-2, C-10) Capacitor Pack -10-10,10-10 mfd., 450 volts each (C-5,

C-13, C-15, C-20) Capacitor -20 mfd. (C-28) Capacitor Pack -20.20.20 mfd., 25 volts each (C-3,

C-11, C-16) Capacitor -30 mfd. (C-21) Clamp -Remote control plug locking clamp Fuse -3 amp. (F-1) Fuse -20 amp. (F-2) ]ask -Phonograph input jack Plug -8 -contact male remote control plug Plug -12 -contact male power plug Post -Extraction fuse post Resistor -120 ohms, }watt (R-48, R-49) Resistor -176 ohms. 25 watt (R-44) Resistor -1,200 ohms, 3 watt (R-6, R-18) Resistor -1,500 ohms, 4 watt (R-26, R-36) Resistor -6,200 ohms, tapped at 1,670, 3,590, 940 ohms

(R-45, R-46, R-50) Resistor -8,200 ohms, 2 watt (R-38) Resistor -10,000 ohms, 3 watt (R-31) Resistor -12,000 ohms, 3 watt (R-32) Resistor -15,000 ohms, 3 watt (R-2, R-14, R-34) Resistor -33,000 ohms, 3 watt (R-4, R-9, R-16, R-21) Resistor -47,000 ohms, 3 watt (R-12, R-24) Reaistor-56,000 ohms, 4 watt (R-3, R-15) Resistor -68,000 ohms, 2 watt (R-37) Resistor -82,000 ohms, 4 watt (R-39, R-40) Resistor -100,000 ohms, 3 watt (R-29, R-30) Resistor -150,000 ohms, 1 watt (R-10, R-22) Resistor -270,000 ohms, 4 watt (R-41, R-42) Resistor -330,000 ohms, 4 watt (R-11, R-23, R-33,

R-35) Resistor -470,000 ohms, 3 watt (R-27, R-28, R-43,

R-47) Resistor -820.000 ohms, 3 watt (R-7, R-19) Resistor -1.2 megohm, 1 watt (R-1, R-5, R-13, R-17) Socket -4 -contact socket for microphone plug Socket -4 -contact insulated rectifier tube socket Socket -Octal base tube, output, or remote control socket Socket -Pickup cable socket and ground plate Transformer -Output transformer (T-2) Transformer -Power transformer (T-1)

CONTROL PANEL ASSEMBLIES Jewel -Pilot lamp jewel bracket and socket. Yaxley Mfg.

Co. Cat. No. 310-R or equivalent; with red jewel. Knob -Volume control or tone control knob Lamp -6.3 volt pilot lamp Panel -Control panel only, less mounting

7900

30452 30164

MI -6227 MI -8228A

12035 30052

32036 32041 32042 32038 32040 32037

11762 92039 32084 17507 32070

14291 11732 14292 32044 31100

3811

32201 32202 32200

18075 18077 18080 18079 18079 4436

18076 18010

32098 32101 32100 14289 32054 25941 30188 30278 32056

Switch -"On -Off" power or "Musk -Speech" switch (S-1, 5-8)

Tone Control -1 megohm (R-25) Volume Control and Switch -250,000 ohms (R-8, R-20,

S-2, S-3) MICROPHONE ASSEMBLY

ro Microphone phone -Micro hone stand Stand-Microphone

Cable -30 ft. 2 -conductor shielded cable Transformer -Microphone transformer

MOTOR ASSEMBLIES Motor-A.C.-D.C. phonograph motor Plate -Metal support plate Plate -Rubber support plate Pointer -Speed indicator pointer Tip -Turntable shaft tip Turntable -l0 -inch turntable

MOTOR .BOARD ASSEMBLIES Box -Needle box and lid D -Speed indicator dial Rest -Pickup arm rest position bracket and spring Switch-D.P.D.T. Phonograph switch (S-5) Switeh-D.P.S.T. Power switch (S-4)

PICKUP AND ARM ASSEMBLIES Armature -Pickup armature assembly Coil -Pickup coil Damper -Pickup damper block with clamp and screw Pickup and Arm Pickup Unit only Screw -Needle holding screw

SPEAKER ASSEMBLY Cone -Speaker cone and voice coil, complete with dust cap Dust Cap -Dust cap for speaker cone Speaker -Complete

VIBRATOR POWER SUPPLY Capacitor -.005 mfd., 1,600 volts Capacitor -.05 mfd., 600 volts Capacitor -0.5 mfd., 50 volts Choke -"A' choke coil Choke-R.F. choke coil Resistor -5,000 ohms, 4 watt Transformer -Power transformer Vibrator -Plug-in unit

MISCELLANEOUS, CABLES & PLUGS, ETC. Cable-A.C. power cable and plug Cable-D.C. power cable --less battery clips and socket Cable -Speaker cable, less plug Clip -1 -set battery clips Plug -Microphone plug Plug -Power cord plug, 12 contact Plug -Speaker cable plug, 8 contact Screw -Cabinet thumb screw Socket -Power cable or battery cable socket


RME PAGE 13-1


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RME PAGE 13-3

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"Trans".

0

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r Black

Red ,500 ohm

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5,500 ohm C.T. Speaker Field

To Transmitter Power Supply

Primary

Typical circuit for remote break-in control of receiver. Terminal pair marked "B" on receiver connect to "B - B". Circuit between "B" pair is closed when relay or remote switch is closed during transmitter stand-by periods. Break-in terminals must be shorted if above circuit is not used.


RME PAGE 13-5

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Ç John F. Rider


RME PAGE 13-7

MODEL 41-43 RADIO MFG. ENGINEERS, INC.

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OJohn F. Rider www.americanradiohistory.com

8 RME MODEL RME-99 Late

FIG -I

V0_TA0E REG VR 150

CARRIER METER ADJUSTMENT

OUTPUT 7C

4.2


Fig. 1 - Front View

Late Model 99 same as Early Model 99 in Vol. %II except that 7A7 tubes were replaced by 7B7 tubes. For Early Schematic, see RME pgs. 12-13.

RECTIFIER 60 U3 I.F

7A.7

COND. NOI LIMITER B.O. 7AS 7A4

2 ND. DET. IST AF AMR 7F7

U2 I.F 7A7 I.F TRIMMERS

COILS 8.4 NOS 1+2

MIIF 74.7

Q OSC. I 7A4 N

DET. 7BB

R.F 747

@John F. Rider


RME PAGE 13-9

MODEL R12E-39,Late RADIO MFG. ENGINEERS, INC.

Crystal Filter Circuit Tuning je,,,Jumper

Line Cora

000 00 o -o 00

R Red ar.k Break-in Relay SpeakerTo

4,000 o Trane

T.ransmittern==== `O Terminals Control Ter. 2500 ohm F.0 Yellow To 0 Relay Coil

Energy Supply Max. Value

X110 v. 0.5 Amp.

Relay to Control Transmitter. Typical Circuit diagram for connecting of rely control. Con-

nect to terminal pair marked "R" on receiver. Relay closes when receiver is on stand-by.

;A)

(C)

For other data see

Volume SII

*moral Marconi connection. Optimum condition existe when A +B . 4-;97-54.17etc.

Optimum condition when A s . Not satisfactory fer wide range frequency. Excellent fer any ama -

iu e To Transmitter

ewer Supply Frimary

Typical circuit for remote break -its control of receiver. Terminal pair marked "B" on receiver connect to "B - B". Circuit between "B" pair closed when relay or remote switch is closed during transmitter stand-by periods. Break-in terminal must be shorted if above circuit is not used.

(B) ---- A . 1

77 Optimum signal input to receiver when A . , and feeder is tap-

ped at proper distance from center. This antenna works quite well usually on even harmonica also.

teur band if A e -1- is in the mid- H Dimensions same ae those of C.

dle of the band. Fer example: For Antenna good for one narrow band. 20 meter band antenna should be de- 74 (For example amateur band) Is not signed for 14,200 KC. A Approx-

directional. imately 33 feet, directionat at

Model RMB99 is the same as the Early model(see Riders right angle from line of wire. - yo1.SII) except that 7A7 tubes were replaced by 7B7 tubes. Jumper "Y" can usually be omitted TEST VOLTAGES OBTAINED AT VARIOUS POINTS, IN RECEIVER CIRCUIT

Measurements made with voltmeter having internal resistance of 1000 ohms per volt.. Instruments with other internal resistances give entirely different readings. NOTE: Line voltage should be 115 volts, Stand-by Switch on.

PIACE TEST PRODS BETWEEN CORRECT VOLTAGE

Radio frequency amplifïer plate and ground 225 volts Radio frequency amplifier screen and ground 130 volts Radio frequency amplifier cathode and ground 3.5 volts First detector plate and ground 2.45 volts First detector cathode and ground 4.2 volte First I.F.'amplifier plate and ground 225 volte First I.F. amplifier screen and ground 130 volts First I.F. amplifier cathode and ground 3.5 volts The same voltages apply to the 2nd and 3rd I.F. Amplifier stages) First detector screen and ground 45 volts First audio amplifier plate and ground. 130 volts First audio amplifier cathode and ground 1.75 volte 7C5 plate and ground 195 volts 7C5 screen and groúnd 210 volts 705 cathode and ground 10 volte 80 rectifier filament and ground. 310 volte


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Rider-1943-PQR.pdf - World Radio History

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