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PACK BELL PAGE 16-1

PACKARD BELL CO. MODEL 5DA

ISSU OR

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2R1-1, 220,000 ohm resistor, is used only in sets utiliz- ing metal, octal base tubes.

:180 ohm '/z watt resistor used for sets employing miniature glass tubes.

TABLE OF REPLACEABLE PARTS

PART REF. NO. SYMBOL DESCRIPTION

21004 -AL Cabinet, plastic: ivory 21004 -BG Cabinet, plastic: walnut 23503 C1A,B Capacitor, variable 23018 C2 Capacitor, paper: .2 Mfd., 200 volt 23228 C3-1 Capacitor, mica: 220 Mmf., 20%

C3-2 23009 C4-1 Capacitor, paper: .05 Mfd., 400 volt

C4-2 23004 C5-1 Capacitor, paper: .005 Mfd., 600 volt

C5-2 23001 C6 Capacitor, paper: .001 Mfd., 600 volt 23006 C7 Capacitor, paper: .01 Mfd., 600 volt 24032 C8 Capacitor, electrolytic: 3 X 30 Mfd.

C9A,B & C 150 volt & 20 Mfd., 25 volt

28013 29308 L1 29203 L2 29002 L3 29004D L4 32012 -AB 32011 -AL 38032 38047 49009 -AL 49009 -AG 52027A -AL 52021A -BG 54002 55003 62000B 68126

Clip, electrolytic Loop, antenna Coil, oscillator Coil, 1st I.F.: 455 KC Coil, 2nd I.F.: 455 KC Cord, AC:6' brown rubber Cord, AC:6' white plastic Dial scale, stationized Dial scale, export Handle, ivory Handle, walnut Knob, plastic: ivory Knob, plastic: walnut Dial, lamp, bayonet base: T-47 Crystal, dial Panel, loop Instruction label


73049 R1-1 R1-2

73041 R2

73055 R3

25001A R4

73057 R5

73051 R6

73081 R7

73022 R8

73077 R9

73071 R10

77015 79002

79012 79033 78029B 83004 84001 84016 89411

Resistor, carbon: 220,000 ohms, 20%, 1 z watt

Resistor, carbon: 22,000 ohms, 10%, 1/z watt

Resistor, carbon: 2.2 megohms, 20%, 1,'2 watt

Control, volume: 500,000 ohms, with AC switch

Resistor, carbon: 4.7 megohms, 20%, 1/( watt

Resistor, carbon: 470,000 ohms, 20%, 1/s watt

Resistor, watt

carbon: 150 ohms, 10%, 1

Resistor, carbon: 560 ohms, 10%, 1/2 watt

Resistor, carbon: 180 ohms, 10%, 1 watt


Shaft, dial drive Socket, tube: octal base, 8 prong

wafer type Socket, tube: 8 prong miniature Socket, dial lamp: bayonet base Shield, cabinet: paper Speaker, permanent magnet: 4" Spring, dial drive Spring, handle Transformer, output

©John F. Rider


2 PACK BELL ODEL 5DA PACKARD BELL C

AN EARLY RUN OF THESE RECEIVERS UTILIZED MINIATURE GLASS TUBES, CONSEQUENTLY THE INFOR- MATION SHOWN HAS BEEN COMPILED TO ACCOMODATE MINIATURE GLASS OR TUBES.

OCTAL BASE GENERAL INFORMATION

Model 5DA is a superheterodyne receiver employing five tubes and a permanent magnet speaker. This model is for operation on AC or DC current and is enclosed in a plastic cabinet.

SPECIFICATIONS Overall Dimensions:

Height 6" Width ....934"

Electrical Rating: Line Voltage . 110-120 volts AC -DC Power Consumption ... 28 watts

Tuning Frequency Range: 540 to 1740 KC

Depth Weight

5,, . 5% lbs.

Intermediate Frequency: 455 KC

Electrical Power Output: Maximum ... 1.7 watts

Loudspeaker: Type ... Permanent Magnet Outside Cone Diameter ... 4" Voice Coil Impedance ... 3.2 ohms at 400 cycles Magnet Rating ... 1.0 Oz. Alnico 5

Tubes: Tube Function No.1 12BE6 or 12SA7 Frequency Converter No. 2 12BA6 or 12SK7 I. F. Amplifier No. 3 12AT6 or 12SQ7 Detector Amplifier No. 4 SOBS or 50L6 -GT Power Amplifier No. 5 35W4 or 35Z5 -GT Rectifier

All D.C. voltages measured with a vacuum tube voltmeter from socket contacts to ground buss.-A.C. voltages measured with a 1000 ohms per volt A.C. meter from socket contacts to ground buss.*-Volume Control maximum.-No signal. -117 volts A.C. line voltage.-All voltages shown are positive D.C. unless otherwise noted. *NOTE: Filament voltages should be measured across the

filament of the tube.

12AT6

113

It VAC

MUG

12666 st

SO

OCTAL BASE TlbE8 IS VAC

30 o

35Z5-GT/G 50L6-GT/G 3- VAC 00

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s VAC 33 VAC

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115

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FIGURE 1-SOCKET VOLTAGES

SPECIAL SERVICE INFORMATION Stage Gain Measurements:

Measurements taken with volume control maximum. - AVC shorted out.

Standard Output ... 60 milliwatts Dummy antenna ... 200 Mmf.

Converter Grid to 1st I.F. Grid ... 71X at 1000 KC Converter Grid to 1st I.F. Grid ... 78X at 455 KC 1st I.F. Grid to 2nd Detector ... 77X at 455 KC Overall Audio Gain ... 375% at .5 watts 400 cycles

Oscillator Grid Voltages: At 117 volts AC line voltages. - Measurements made

with an A.C. vacuum tube voltmeter input loading above 10 megohms.

600 KC ... 15 volts AC 1600 KC ... 20 volts AC

D.C. Resistance Measurements :

1st I.F. Coil Primary ... 17.5 ohms

2nd I.F. Coil Primary ... 14.5 ohms Oscillator Coil Primary ... 1.2 ohms

Secondary ... 17.6 ohms



ALIGNMENT PROCEDURE Alignment Procedure consists of the four steps outlined

in the Alignment Procedure Chart. For Step No. 1, I.F. Alignment, connect the leads of a

test oscillator to the mixer grid and the ground buss through an .01 Mfd. capacitor (dummy load). Upon com- pletion of this step "Rock" the variable condenser to assure that the I.F.s have been aligned to the correct frequency. Output should remain constant at any setting of the variable condenser.

Steps 2 to 4 employ a Hazeltine Standard Test Loop No. 1160, or a reasonable substitute. Connect the test oscillator leads across this loop and place it in a vertical position about two feet from the receiver loop.

IMPORTANT NOTICE: Make certain that each step is done with a minimum input signal.

ALIGNMENT CHART

CONNECT STEP TEST OSC.

TO

TEST OSC.

SETTING

ADJUST POINTER FOR MAX. SETTING OUTPUT

1 Mixer Grid & Grd. .01 Mfd. Cap.

455 KC 540 KC Trimmers A, B, C, & D

2 Standard' Test Loop 1740 KC 1740 KC

Trimmer E to 1740 KC

3 Standards Test Loop 1500 KC 1600 KC

Trimmer F

4 Standards Test Loop 600 KC 600 KC Loop

'NOTE: Hazeltine Standard Test Loop No. 1160 or a reasonable substitute.

FIGURE 2-TRIMMER LOCATION

©John F. Rider


PACK BELL PAGE 16-3

LI

12E1E6

ANT.

GRND

IF ` 455 KC

560 110V -120V R8

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PACKARD BELL CO. MODEL 568

35W4

30 ME C9A


12846

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4.7 MEG RS -2


4

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PHONO

470 MMF CB -2

4-

18004A 18012 20001B 21027B

Bracket, pilot light Pick-up rest Button plug Cabinet, power cord holder

65042A 66013 66008 67005

21046C Cabinet, wood: fabricoid covered 73049 Rl 23503 C1Á & B Capacitor, variable: two gang with

pulley 73041 R2 23018 C2 Capacitor, paper: .2 Mfd., 200 volt 23228 C3-1 Capacitor, mica: 220 Mmf., 20% 73055 R3

C3-2 23009 C4-1 Capacitor, paper: .05 Mfd., 400 volt 25001A R4

C4-2 23004 C5-1 Capacitor, paper: .005 Mfd., 600 volt 73057 R5-1

C5-2 R5-2 23916 C6-1 Capacitor, mica: 470 Mmf., 20%

C6-2 73051 R6 23006 C7-1 Capacitor, paper: .01 Mfd., 600 volt

C7-2 73081 R7 24032 C8 Capacitor, electrolytic: 30 Mfd., 2 x

C9 A,B & C 20 Mfd., 150 WV & 25 Mfd., 25 WV 73022 R8 28013 Clip, electrolytic 29820 L1 Loop antenna 73077 R9 29203 L2 Coil, oscillator 29002 L3 Coil, 1st I.F.: 455 KC 73071 R10 29004D L4 Coil, 2nd I.F.: 455 KC 32012 -AB Cord, AC: 6' brown rubber 73016 R11 38044B Dial scale, stationized 38053 Dial scale, export 77017 41002 Escutcheon, AC switch 78019 52014 Knob, bar 78026 54002 Lamp, dial: bayonet base 79004 55008 Crystal, dial 79007 58012 Motor, phono 79012 59003 Needle, phono: permanent, osmium 79033

tip 83004 62030A Panel, cabinet 84001 62031A Panel, motor 86005B 63023 Pick-up arm 86701A 63024 Pick-up cartridge 89411

Plate, paper: dial Plug, phono Plug, phono motor Pointer, dial Resistor, carbon: 220,000 ohms, 20%,

1/2 watt Resistor, carbon: 22,000 ohms, 10%,

1/z watt Resistor, carbon: 2.2 megohms, 20%,

1 watt Control, volume: 500,000 ohms, with

AC switch Resistor, carbon: 4.7 megohms, 20%,

1/2 watt

Resistor, carbon: 470,000 ohms, 20%, 1 watt


Resistor, carbon: 560 ohms, 10%, 1/2

watt Resistor, carbon: 180 ohms, 10%, 1

watt Resistor, carbon: 1000 ohms, 10%, 1

watt Resistor, carbon: 180 ohms, 10%, 1/2

watt Shaft, dial drive Shield, AC switch Shield, phono plug Socket, phono Socket, phono motor Socket, tube: 7 prong miniature Socket, dial lamp: bayonet base Speaker, permanent magnet: 4" Spring, dial drive Switch, rotary: radio -phono Switch, slide: AC phono motor Transformer, output

©John F. Rider


?AGE 16-4 PACK BEIL MODEL 568 PACKARD BELL CO.

SPECIFICATIONS Overall Dimensions:

Width 15" Height ... 73A"

Electrical Rating: Line Voltage . . 110-120 volts AC Power Consumption ... 43 watts

Tuning Frequency Range: Intermediate Frequency: 540 to 1740 KC 455 KC

Electrical Power Output: Maximum 1.7 watts

Loudspeaker: Type Permanent Magnet Outside Cone Diameter . . 4" Voice Coil Impedance ... 3.2 ohms at 400 cycles Magnet Rating ... 1.0 Oz. Alnico 5

Tubes: 1213E6 Frequency Converter 12BA6 I. F. Amplifier 12AT6 Detector Amplifier 50B5 Power Amplifier 35W4 Rectifier

Depth . . . 13%" Weight . . 15 lbs.

MINIATURE GLASS TUBES _.5

35 VAC 3SW4

35 VAC

50

o

117 SOBS no 50 VAC

6 VAC

50 vAC

us 5.3

12AT6

IS vAC

IB VAC

12E146 92

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etio 1.3

o 0 0

o 13 VAC

90 90 -I

FIGURE 1-SOCKET VOLTAGES

All D.C. voltages measured from socket contacts to ground buss with a vacuum tube voltmeter. - A.C. voltages measured with a 1000 ohms per volt A.C. meter from socket contacts to ground buss.* - volume control maximum. - No Signal. - 117 A.C. line voltage. - All voltages shown are positive D.C. unless otherwise noted.

*NOTE: Filament voltages should be measured across the filament of the tube.

GENERAL INFORMATION Model 568 is a combination superheterodyne receiver and

phonograph. This model employs a permanent magnet speaker and a specially designed "Hi -Q" loop antenna. The model is capable of playing ten or twelve -inch records and is enclosed in a fabricoid covered carrying case.

IMPORTANT: While it is true this model uses a con- ventional "AC -DC" circuit, it must be confined to AC operation due to the AC phonograph motor.

NOTE: The 3 position Radio -Phono switch shown in the Schematic Diagram was used in the major portion of this model. A very small quantity utilized a 4 position switch. The overall wiring differs very little; the extra position on the 4 position switch provides a "Radio -Tone" position.

SPECIAL SERVICE INFORMATION Stage Gain Measurements:

Measurements taken with volume control maximum. - AVC shorted out.

Standard Output ... 50 milliwatts Dummy Antenna ... 200 Mmf.

Converter Grid to 1st I.F. Grid ... 71X at 1000 KC Converter Grid to 1st I.F. Grid . . 78 X at 455 KC 1st I.F. to 2nd Detector ... 77X at 455 KC Overall Audio Gain ... 375X at .5 watts 400 cycles

Oscillator Grid Voltages: 600 KC ... 15 volts AC 1500 KC . . 20 volts AC

DC Resistance Measurements: 1st I.F. Coil

Primary . . . 17.5 ohms Secondary . . 17.5 ohms 2nd I.F. Coil

Primary ... 14.5 ohms Secondary . . 14.5 ohms Oscillator Coil

Primary . . . 1.2 ohms Secondary . . 4.5 ohms ALIGNMENT PROCEDURE

Alignment Procedure consists of the four steps outlined in the Alignment Chart.

For Step No. 1, I.F. Alignment, connect the leads of a test oscillator to the mixer grid and the ground buss through an .01 Mfd. capacitor (dummy load). Upon com- pletion of this step "Rock" the variable condenser to assure that the I.F.s have been aligned to the correct frequency. Output should remain constant at any setting of the variable condenser.

Steps 2 to 4 employ a Hazeltine Standard Test Loop No. 1150 or a reasonable substitute. Connect the test oscillator leads across this loop and place it in a vertical position about two feet from the receiver loop.

IMPORTANT NOTICE: Make certain that each step is done with a minimum input signal.

ALIGNMENT CHART

CONNECT TEST OSC:

TO STEP

TEST OSC.

SETTING

POINTER ADJUST SETTING FOR MAX.

OUTPUT 1 Mixer Grid

& Grd. .01 Mfd. Cap.

455 KC 540 KC Trimmers A, B, C & D

2 Standard* Test Loop 1740 KC 1740 KC

Trimmer E to 1740 KC

3 Standard* Test Loop 1500 KC 1500 KC Trimmer F

4 Standard* Test Loop 600 KC 600 KC Loop

*NOTE: Hazeltine Standard Test Loop or a reasonable substitute.

TRIMMERS C

TRIMMER G

VOLUME CONTROL B SWITCH

TRIMMER E

TRIMMER

TUNIN9

TRIMMER A

L TRIMMER B

FIGURE 2-TRIMMER LOCATION

©John F. Rider


PHILCO PAGE 16-1

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2 PHILCO MODEL CR -2 PHILCO CORP.

L4

C23/''9NVARIABLE COND.

FRONT

ANTENNA CONNECTION

TOP VIEW OF CHASSIS

VOLUME CONTROL 7A7 ON-OFF SW.,R10

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CONNECT AN OUTPUT METER ACROSS THE VOICE COIL AND TIE SPEAKER.

CONNECT A SIGNAL GENERATOR THRU A .01 mf CONDENSER TO THE ANTENNA LEAD. MESH THE VARIABLE TUNING CONDENSER FULLY. (PIN 4 OF THE 7B8 SHOULD BE GROUNDED !HILE ALIGNING THE IF STAGE) SET THE SIGNAL GENERATOR TO 455 KC. TURN THE VOLUME CONTROL OF TIE RECEIVM TO MAXIMU,1,. TURN UP

THE OUTPUT OF THE SIGNAL GENERATOR SO THAT THERE IS A SMALL DEFLECTION ON THE OUTPUT METER. NOW ADJUST IF TRIMMERS C26, C25 AND C24 FOR A MAXIMUM DEFLECTION ON THE METER.

TO ALIGN THE OSCILLATOR STAGE,CONNECT THE SIGNAL GENERATOR THRU A 50 I.u:IF CONDENSER TO THE ANTENNA LEAD. TUNE. BOTH THE RECEIVER AND THE SIGNAL GENERATOR TO 1600 KC. TURN: UP THE OUTPUT OF THE SIGNAL GENERATOR SO THAT THERE IS A SMALL DEFLECTION ON THE OUTPUT METER. ADJUST OSCILLATOR TRIMMER C23, FOR A MAXIMUM DEFLECTION ON THE PETER.

TO ALIGN RF STAGE FOLLOW ABOVE PROCEDURE EXCEPT THAT THE RECEIVER AND SIGNAL GENERATOR ARE TUNED TO 1400 KC AND TRThR C22 IS ADJUSTED FOR iLAÄII UM DEFLECTION ON THE OUTPUT METER.

©John F. Rider


PHILCO PAGE 16-3

PHILCO CORP.

POINTER

SELECTOR

TUBS PIN N0. VTV1.1 200 00Oa- 1,000 r. RESISTANCE v.

7 A 7

RF 1 0 o 0 o 2 55V. 51V. 46V. OVER 5 MEG. 3 47V. 46V. 43V. OVER 5 REG. 4 0 0 0 0 5 0 0 0 0

6 -1.2V. 35V. -.04V. 2.7 LTG. 7 1.1V. 1V. 1V. 200-A- 8 6.2V. 6V. 6.1V. .3

7 5 8 1 o o o 0

CO:lBRTER 2 78V. 77V. 729. OVER 5 MEG. 3 78V. 77V. 72V. OVER 5 MEG. 4 -12V. -8.3V. -3.3V. 125 K 5 47V. 46 V 48V. OVER 5 MEG. 6 -1.05V. .16V. -.01V. 2.4 MEG. 7 1.15V. 1V. 1V. 200". 8 6.2V. 6V. 6V. .3 .`

7 A 7 1 0

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3 48V.

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5 -1V. -.28V. -.03V. 2.7 ENG.

6 -1.2V. -.42V. -.05V. 380 K.

7 0 0 0 0

8 6.2V. 6V. 6V. .3 .s.

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76V. 71V. OVER 5 MEG. 46V. 43V. ,OVER 5 MEG. 0 0 0 0 0 0

0 0 30-n- 1V. 1V. 210_0...

6V. 6V. .3

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54V. 23V. OVER 5 MEG. -.36V. -.1V. OVER 5 MEG.

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MODEL CR -2

DIAL DRIVE DRUM

CONDENSER SHAFT

71.5 1 0 0 0 0

AUDIO OUTPUT 2 124V. 124V. 120V. OVER 30 MEG. 3 95V. 97V. 90V. OVER 30 MEG.

4 - - - -- 5 - -- - -- 6 .05V. 0 0 650 K

7 6.3V. 6V. 6V. 210.1..

8 6.2V. 6V. 6V. .3

7Y4 1 6.2V. 6V. 6.1V. .3 h. RECTIFIER 2 - - - --

3 AC AC AC 2404%- 4 - - - - 5 - - - - 6 AC AC .0 260 -n- 7 130V. 120V. 120V. OVER 5 MEG. 8 0 0 0 0

VIBRATOR 1 0 0 0 0 2 3 2 6V. 5.7V. 6V. .6 .T

3 6V. 5.7V. 6V. .6.'...

1 4 4 6.2V. 5.9V. 6.2V. .4 ."-. Bottom View

VCI.TAGE IEASURED ;7ÆN "A" VOLTAGE Z 6.4V.. THE CONDENSER FULLY MESHED AND VOLUME CONTROL AT MINIM`JM.

©John F. Rider


4 PHILCO MODEL CR -4

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©John F. Rider


PHILCO PAGE 16-5

MODEL CR -6

PHILCO CORP.

aor 0321 W4

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©John F. Rider


6 PHILCO MODELS CR-4,CR-6

PHILCO CORP.

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©John F. Rider


PHILCO PAGE 16-7

-1

rz SEE DETAILED DIAL DRIVE DRAWING

IIIP A9407.

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CONTROL UNIT

TUBE PIN NO. VTVM 20.00011- 1.000 A. RESISTANCE 7 C 5 1 0

-.-.---V-- '-'" AUDIO OUTPUT 2 220V 3 220V

G B A 6 1 -0.85V -2 V 0 V. 1.2 MEG. 4 23óV

PERMEABILITY TUNER.

0 0 210Y. 200V. 210V. 200V. 2SOV 220V

RF 2 OV 0'V 0 V. 0 5 - - 3 0V 0 V 0 Y. 0 6 0.06V OV. OV

4 5.57 5.3V. 6.4V. 0.5 n. 7 7.7V 8V. 8V 210 s+.

6 166V 180V. 1807. OVER 5 I. B ,SV 5.3 5.6V 0.4sy, 6 60V 58V 52Y. OVER 5 31E0.

7 1.44 V 1.3 V. 1.3 V. 50041. 6 X 4 1 A.C. A.C. A.C.

:17 RECTIFIER 2 OV OV, 0V.

6 3 E ö 1 - S.6V -2.b4 -1.2V. 24 E 3 OV 0V. OV.CC!vV

2 04. OV. OV. 1.4.n. 4 5.4V 6.2V.6.37, 3 OV OV. QV. 0 5 -- 4 6.5V b.SY 5.47 0.5. G A.C. A.C. B.C. 420 e.

5 220V 220V. 200". OVER 5 MEG. 7 237V 220V. 220V, 07SR 5 IIbG.

6 60" 59V. 61V. OVER 5 HEG. rIBRATOR 1 OV OV, OV. 0

7 -O.BV -O.1V. OV. 2.2 MEG.2 3 5.3V 5.07 5.2V .8 41..

6 B A 6 1 OV OV OV 17.5 3 5.37 5.07 5.2'7 .8h,

IF 2 OV OV OV 0 1 4 4 5.4V 5.2V 5.37 .6 n

3 OV OV OV 0

4 S.SV 5.4V 5.4V 0.4 M..VOLTAGE L.EA.SJitEO 1V:iR:+ ^Aa /OLTAGS a 6.0V. PU[II:iG SLUG

5 220V 210V 210V OVER 5 MO. AT 1,177EST 7624JEIICY,7OLJ1i3 CC:TROL AT MINIMUM. TONECO'T:tOL

6 80V 68" 52V OVER 6 MEG. FU" Y :LCCK"IISE. 7 S.SV 3.07 2.84 2E

G A V 6 1 -0.77

DET k 13T AUDIO 2 OV 3 0V 4 5.57 5 -0.75V G -0.757 7 106V

-0.47. -0.17 0V. 0V. 0V OV.

5.3V. 5.47. -0.5V. -0.27.

-0.5V. -0.2V. 100V 64V

10 MEG 0

0 0.4.0..

280 n

300 .0

OVER. 6 MEG.

©John F. Rider


8 PHILCO MODELS CR-4,CR-6

PHILCO CORP.

CR -4

CR -8

F-

2JI z (VO NOJ IOOCO u>cY óiz Z u O

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TONE CONTROL

NO. C 600M UNIVERSAL

CONTROL UNIT

TONE CONTROL

ON-OFF SWITCH VOLUME CONTROL

MULTIPLE CONDUCTOR CABLE

SPEAKER

ON-OFF 5W. VOLUME CONT.

SPEAKER CABLE

STATION SELECTOR

!2141r

DIAL TUNING / LEAD

ANTENNA LEAD IN

©John F. Rider


PHILCO PAGE 16-9

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10 PHILCO MODEL 46-200

VOL. CONT. SHAFT

.TUNING SHAFT

PHILCO CORP.

TOP VIEW

FRONT

BOTTOM VIEW

POINTER TUNISHAFTNG

ALIGNMENT

Remove the chassis from the cabinet and connect the output meter to the left

terminal (High) and the center terminal (Low) of the three lug terminal strip on the rear of the chassis.

Connect the Signal generator to the standard Hazeltine loop, Model 1150 find

couple it loosely to the receiver loop.

Set the Volume at maximum, and fully mark the tuning condenser.

The output of the signal generator should be just sufficient to give a readable deflection on the output meter.

Set the signal generator to 455 KC and adjust the IF trimmers for maximum output in the following order. C8, C7, C6, C5.

Set the signal generator and receiver to 1600 KC and adjust the oscillator trimmer C2 for maximum output.

Set the signal generator and receiver to 1400 KC and adjust the RF trimmer C4 for maximum output.

©John F. Rider


PHILCO PAGE 16-11

MODEL 46-200

NOTE - TUNING CONDENSER IN MAXIMUM CAPACITY POSITION.

PHILCO CORP.

GANG CONDENSER

SHAFT (DIAL POINTER

ON FRONT END)

3 VZ TURNS

FRONT OF CHASSIS TUNING SHAFT

SOCKET PIN VT'JL 20,000 -rt../ 1,000 R / RESIST,L'CE

P.V. P.V.

TA8 1 AC AC AC 30 -A -

CONY. 2 100 100 100 OVER 2 ì.B':S.

3 100 100 100 OVER 2,EGS. 4 -12 -8.6 -4.2 900 K

5 44 44 38 OVER 2 :EGS.

6 -1 -0.8 -0.4 2.8 '..G:GS.

7 0 0 0 0

8 AC AC AC 24 -.A-

14A7 1 AC AC AC 12 -n-

I -F AL:PL. 2 100 100 100 OVER 2 tEGS.

3 43 43 38 OVER 2:'EGS.

4 0 0 0 0

5 0 0 0 0

6 -1 -0.8 -0.4 2.8 'EGS.

7 0 0 0 0

8 AC AC AC 24 fi..

1486 1 AC AC AC 12 -n-

DET. 2 56 54 16 OVER 2 LEGS.

A.V.C. 3 -1 -0.6 -0.4 3 :EGS.

AUDIO 4 0 0 0 0

5 -1 -0.8 -0.4 2.8 2.EGS.

6 -1 -0.6 -0.3 5.2 ?EGS.

7 0 0 0 0

8 0 0 0 0

50L6GT 1 56 54 16 OVER 2 EGS.

AUDIO 2 AC AC AC 75

OUTPUT 3 105 105 105 OVER 2 ?EGS.

4 100 100 100 OVER 2 IEGS.

5 0 0 0 400 K

6 -1 -0.8 -0.4 2.8 EGS.

7 AC AC AC 321E 8 6 6 6 130...

35Y4 1 AC AC AC 105-n- 2 AC AC AC 105.A-

3 -12 -8.6 -4.2 90 K

4 AC AC AC 105

5 100 100 100 OVER 2 LEGS.

6 0 0 0 0

7 125 125 125 OVER 2 LEGS.

8 AC AC AC 75..A,

All voltage and resistance measurements made with respect to B-.

And with a line voltage of 116 V.A.C.

There is a resistance of 140 K. between B- and chassis ground.

©John F. Rider


12 PHILCO

MODEL 46-1203

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PHILCO CORP.

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©John F. Rider RECORD CTIANGER: Philco 46-1226, Philco P.15-45


PHILCO PAGE 16-13

PHILCO CORP. MODEL 46-1203

CHOKE. Li r

ANT. TRANS F.

T3-y C6

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PHONO. SW.

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SHAFT

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RF C3

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TOP VIEW

R2

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T6

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C15

C 14

TUNING SHAFT

VOLUME TONE CONTROL CONT. SHAFT

BOTTOM VIEW

TUNING SHAFT

CHOKE

ON-OFF SW

VOL.CONT

Ri C24

ALIGNÌiENT

This receiver may be aligned with the chassis in the cabinet.

Connect the output meter to the center terminal (Low) and the right terminal (Hi{;h) of the three lug terminal strip mounted on the rear of the chassis.

Connect the signal generator to the standard Hazeltine loop Model 1150 and couple it loosely to the receiver loop. Set the volume control at maximum, and fully mesh the tuning condenser.

The output of the signal generator should be just sufficient to give a read- --able deflection on the output meter.

Set the signal generator to 455 KC and adjust the IF trimmers for maximum output in the following order: C11,C10,C9,.C8.

Set the signal generator and receiver to 1600 KC and adjust the oscillator trimmer 02 for maximum output.

Set the signal generator and receiver to 1400 KC and adjust the RF trimmer C4 for maximum output.

©John F. Rider


14 PHILCO

MODEL 46-1203

PULLEYS DIRECTLY UNDERNEATH EACH OTHER

NOTE: TUNING CONDENSER IN MAXIMUM CAPACITY POSITION.

''DIAL POINTER

PHILCO CORP.

PULLEY

DRIVE PULLEY

3A TURNS

GANG CONDENSER

SHAFT

TUNING SHAFT FASTENED TO

CHASSIS

SOCKET PIN NO. VTVM 20,000.A./ 1,000 1.. / RESISTA[iCE

P.V. P.V.

7C7 1 100 V 100 V 100 V OVER 5 MEG

RF 2 170 V 165 V 165 V OVER 5 MEG

3 115 V 108 V 108 V OVER 5 MEG

4 -4.5 V -2.2 V -2 V 2.8 LEG

5 0V 0V 0V 0

6 -1.3 V -0.3 V 0 V 3.8 MEG

7 1.3 V 0.8 V .8 V 190.n..

8 100 V 100 V 100 V OVER 5:fEG

7Ag 1 100 V 100 V 100 V OVER 5 LEG

CONVERTER 2 167 V 160 V 160 V OVER 5 ITC

3 113 V 110 V 110 V OVER 5 IBG

4 -12.5 V -4.4 V -2 V 130 K

5 65 V 65 V 56 V OVER 5 PEG 6 -4.5 V -2 V -0.2 V 2.8 LEG

7 1.3 V 0.8 V 0.9 V 190,-A-

8 100 V 100 V 100 V OVER 5 LTG

7E7 1 100 V 100 V 100 V OVER 5 MEG

IF 2 170 V 160 V 160 V 4.4 'EG

3 65 V 65 V 57 V 4.6 LEG

4 0 V 0 V 0 V 0

5 0 V 0 V 0 V 0

6 -1.5 V -0.4 V -0.2 V 2.8 ?EG

7 0 0 0 Q

8 100 V 100 V 100 V OVER 5?EG

7C6 1 100 V 100 V 100 V OVER 5 LEG

AVC 2 78 74 35 OVER 5 LEG

DETECTOR 3 -0.8 V -0.5 V -0.2 V 10 PEGS.

4 0 V 0 V 0 V 0

5 -4.4 V -1.2 V -0.2 V 2.8 LEG

6 -4.3 V -1.5 V -0.8 V 600 K

7 0 V 0 V 0 V 0

8 100 V 100 V 100 V OVER 5 LBG

35L6GT/G 1 0 V 0 V 0 V 0

2 100 V 100 V 100 V OVER 5 LEG

3 155 V 150 V 150 V OVER 5:EG 4 118 V 115 V 115 V OVER 5MEG 5 0V 0V 0V 500 K 6 173 V 165 V 165 V OVER 5 REG

7 100 V 100 V 100 V OVER 5 MEG

8 7.9 V 7.6 V 7.8 V 190-1i,

50X6 1 100 V 100 V 100 V OVER 5 'RG

RECTIFIER 2 100 V 100 V 100 V OVER5 '..G

3 0 V 0V 0 V 0

4 173 V 170 V 170 V OVER 5 REG 5 120 V 115 V 110 V OVER 5 REG 6 100 V 100 V 100 V OVER 5 1.IU

7 200 V 200 V 200 V OVER 5 IRG

8 100 V 100 V 100 V OVER 5 MEG

With respect to B-: Line Voltage 116 V

On -Off switch in off position Volume control at minimums Radio -Phono switch on radio Tone control in left (counterclockwise position)

©John F. Rider


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©John F. Rider


2 PHILLIPS ODELS 3-L4Xa3-2AX PHILLIPS PETR ,EU 1

ALIGNMENT PROCEDURE

1. Remove chassis and loop antenna from cabinet. Reconnect loop to chassis and space it approximately same distance from chassis as when installed in cabinet.

2. Note that there are four calibrating lines stamped into the metal dial frame. When gang condenser is hilly meshed, dial pointer should be in the position indicated by first line at the left. If it is set incorrectly, release pointer clip on dial cord and reposition pointer.

3. Connect an output meter across the speaker voice coil or from plate of 35L6GT tube to B- through a .1 Mfd. condenser (see voltage chart for convenient B- connection).

4. Connect ground lead from signal generator to B- through a .25 Mfd. condenser. 5. Set volume control at maximum volume position and use a weak signal from the signal generator.

DUMMY ANT. IN SERIES

WITH SIGNAL GENERATOR

' CONNECTION OF SIG. GENERATOR

OUTPUT TO RECEIVER

SIGNAL GENERATOR FREQUENCY

RECEIVER DIAL

SETTING

TRIMMER NUMBER

TRIMMER DESCRIPTION

TYPE OF ADJUSTMENT

200 MMFD. Mica

Condenser Control Grid of 12SA7 455 RC

Any point where it does not affect the signal

1-2 2nd I.F. Adjust for maximum output. Then repeat adjustment.

3-4 ist I.F.

200 MMFD. Mica

Condenser

External Antenna

o ClipLoo

Frame P

1500 RC Set pointer to 1500 KC reference line stamped into metal dial plate (first line at the right)

5 Broadcast Oscillator (Shunt)

Adjust for maximum output.

200 MMFD. Mica

Condenser

External Antenna Clip on Loop Frame

1500 RC Tune to 1500 KC venerator signal 6

Broadcast R.F. Adjust for maximum output.

200 MMFD, Mica

Condenser

External Antenna Clip on Loop Frame

1500 RC Tune to 1500 KC generator signal 7 Broadcast

Antenna Adjust for maximum output. t P

TOP VIEW OF CHASSIS

BC OSC 15001EC

BC R F

500 KC

BC ANT tsoe KC

OIE SONÉ GANG CONDENSERSHAVE

TRIMMERS LOCATED AS SHOWS NENE

Be sure R.F. and I.F. stages are taining a tuned and calibrated precautions: 1. For all gain measurements

connect signal generator as shown, Use 600 KC. signal with 400 cycle modulation (use nearby frequency if local station interferes.)

455 KC

DIAL AND POINTER DRIVE CORD

ARRANGEMENT To string dial cord, set gang condenser to fully meshed position and use following parts: 114955 Clip on end of cord 117057 Cord (55 inches) 119087 Ring for dial cord 161384 Tension Spring

APPROXIMATE STAGE GAIN DATA accurately aligned before measuring gain. R.F. gains can be measured with a "channel" type instrument con.

R.F. amplifier. A vacuum tube voltmeter may be used for audio gain measurements. Observe following

2. For R.F. and I.F. measurements connect negative terminal of a 3 volt battery (two 11/2 volt cells in series) to A.V.C. lead and positive tertnmal to B-. This provides a d3finite operating point. IMPORTANT: Disconnect battery when measuring audio stage gains.

3. Be sure radio is carefully tuned to gen. erator signal (use weak sig. nal for sharp tuning.)

4. When using a "chan. nel" type instrument carefully tune it for maximum output at desired frequency be fore making measurements.

The R.F. and. I F. stage gains shown below are less than under normal operating conditions due to the use of 3 volts fixed bias in order to establish a definite operating point. Therefore, these values are not intended to indicate the full capability of a stage.

2.5x 600 KG

SIGNAL 200 GENERATOR Mtr

SET TO 600 RC a gast

t---1 4

8X tax 75X 6°R KG ANvrRi AT.ssRc

á°óne °A ss.c 12SA7 12SF7

ht IE1.-NC. IF.-2D41fEr.-4.F.E.

20X oo c.ctr

r" Differences in tube characteristics, tolerance of pasts, adjustment of tuned circuits, and variations of line voltage will influence stage gain. Accuracy of measurements is dependent upon careful tuning of receiver to generator signal and experience in using your test equipment. These factors may create considerable variation in gain measurements.

©John F. Rider


PILOT PAGE 16-1

7 MODEL T -411-U

PILOT RADIO CORP.

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©John F. Rider


2 PILOT dchefreluatic,s n

MODEL T -411-U

20-11

LOOP ASSEMBLY

284-23

aVC.

(PRI)

70-54

22-11 Cl

GAJJGED

5

ANT. SELECTOR SW. IN "LOOP"POSITION.

SEC. 70-54

ANT. SELECTOR SW. IN "OUTSIDE" ANT. POSITION

22-11

70-54

TO PIN 4

TO PIN

Cl -+ %T

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©John F. Rider


PILOT PAGE 16-3

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PURE OIL PAGE 16-1

©John F. Rider


2 PURE OIL MODELS 5D15I7G-5015, THE PURE OIL CO., U.S.A. 5D25WG-5O25,Puritan

SPECIFICATIONS 5 Tube Superheterodyne, including Rectifier Tubes Power Output -.-.1.5 watt maximum, .9 watt (10% distortion)

Tuning Frequency Range 540 to 1600 KC Intermediate Frequency 455 KC

Power Consumption 30 watts (At 117 volts AC) Speaker 5" PM Dynamic

O CT

C -2C ANI TRIMMER

C -2D OSC. TRIMMER

T-3 I ST I F TRANS.

C-58 C-6

T-4 2 ND I F TRANS.

C-7 C-8 I

DIAL CALIBRATION

1400 KC INDEX LANE

600 KC INDEX LINE END

DIAL POINTER INDEX

INDEX LINE I NE

INNER

DIAL / EDGES OF

LIGHT j LIGHT DIFFUSER

vllesi DIFFUSER MOUNTING

n,. io.' BRACKET

In order to align the receiver, the dial pointer must be positioned on the dial string correctly with reference to the dial. Index lines are provided on the dial light diffuser for this pur- pose.

Before aligning the receiver (or when replacing the dial light diffuser) check the position of the diffuser strip, making certain that the two extreme index lines are aligned with the inner edges of the diffuser mounting bracket opening. The bracket should be crimped to prevent move- ment of the diffuser strip. To position

ALIGNMENT PROCEDURE

Check dial pointer position, see DIAL CALI- Signal Generator which will provide an ac -

BRATION paragraph. curately calibrated signal at the test fre-

Volume Control-Maximum All Adjustments. quencies as listed.

Allow Chassis and Signal Generator to "Heat Output Indicating Meter: Non -Metallic Screw -

Up" for several Minutes. driver. The equipment in column at right is required Dummy Antennas-.1 mf., 50 mmf.

for aligning: Blocking Condenser-.1 mf.

SIGNAL GENERATOR GANG ADJUST TRIMMERS

DUMMY CONDENSER TO MAXIMUM ANTENNA SETTING (See Trimmer Illustration) FREQUENCY ANTENNA GROUND

SETTING CONNECTION CONNECTION

455 KC Control Grid Chassis Base 12SK7-I.F. Through .1 mf.

Prong No. 4 Condenser

.1 mf. Turn Rotor to 2nd I.F. (C-7) & (C-8)

full open

455 KC Control Grid Same As 12SA7-1st Det. Above

Prong No. 8

.1 mf. Turn Rotor to 1st I.F. (C-5) & (C-6) full open

1620 KC Control Grid External Ground 12SA7-1st Det. Clip On Loop

Prong No. 8

.1 mf. Turn Rotor to Oscillator (C -2D) full open

1400 KC External Antenna Same As Clip On Loop Above

50 mmf. Turn dial to Antenna (C -2C) 1400 KC. See

Note A

the dial pointer, turn the large drive pulley to the maximum counterclockwise position. The dial pointer should be directly over the dial pointer index line. (See illustration).

DRIVE CORD REPLACEMENT

Turn the large drive pulley to the maximum counterclockwise position. Use a new 10X48 drive cord assembly, tie one end to the tension spring and fasten the other end of the spring to the drive pulley. Install the cord as shown in the illustration. Wind 2% turns counterclockwise around the tuning shaft with the turns progressing away from the chassis. After string is

installed, stretch the tension spring and tie free end of cord to spring.

REPLACEMENT PARTS LIST

NOTICE: There is a model number label on the

chassis. This label identifies the radio as to chas-

sis, dial and issue letter. When ordering parts or writing, give ALL information appearing on

this label. MISCELLANEOUS

12A432 5" Speaker 3A303 Tube Socket. Octal (8 prong) Molded _...

I0A297 Knob (Brown) --- 10A300 Knob (Ivory) 55X255 Cabinet (Ivory) ...

55X313 Cabinet (Brown) _

28X292 Snap Buttons (mounting loop to cabinet)........ 14X334 Speaker Baffle 13X328 Line Cord Assembly

TRANSFORMERS AND COILS 9A1916 T-1 "B" Range Loop Antenna Assembly_. 9A1914 T-2 Oseillator Coil Assembly 9A1808 T3 1st I.F Coil Assembly 9A1809 T 4 2nd I -F Coll Assembly ...

51X132 T-5 Output Traneformer

POINTER CLAMP

STRING GUIDE

DIAL STRI

GANG CONDENSER CLOSED

POSCI,ON.

A VINVLITE SLEEVE

DRIVE SHAFT

TENSION SPRING

CAPACITORS

I4A194 c-2A,C-C-2D2B. Gana Condenser Assembly ..

C2C

885474 884151 B84270 C85152

R7 470.000 ohms 0.5 watt Carbon R-8 150 ohms 0.5 watt Carbon R-10 27 ohms 0.5 watt Carbon R -I I 1500 ohms 1.0 watt Carbon

C-5,C6 Part of T-3 (1st I -F Coln C-7.0-8 Part of T-4 (2nd I -F Coil)

49X112 C -9Á.C98 50-50 mmf. Dual Mica 866103 C -I 1,C- 13 .01 mf 250V. Tubular 47X468 C12 220 mmf D66502 C-14 .005 el

Molded ...__.._ 400V. Tubular DIAL AND DRIVE ASSEMBLY

D66503 C-16 .05 ml 400V. Tubular .. __

45X341 SC -17A 50 mf C-178 50 mf

150V. I Dry Eleetro:ytle 265466 150V. 1

Pointer Bracket Assembly complete with light diffuser holder, string guide and

B66503 C18 .05 mf 200V. Tubular idler pulleys 41X74 15X223

Dial light diffuser Pointer ..

6X21 Rubber Grommet I Mtp. Oanp condenser...

RESISTORS 20X329 26X482

Cond. Cushion Stud l Drive shaft .. .. ...

19X192 "C" Wisher (for drive shaMU.. 884223 R -I 22.000 ohms 0.5 watt Carbon...... .... 10X48 Drive cord aseemhly B85225 R2 2.2 men. B85473 R-3 47,000 ohms 36X352 R-4 500.000 ohms

0.5 watt Carbon......._. 28X95 0.5 watt Carbon._. 7A194

Volume control and line switch _. 58X688

Drive cord tension spring. _... Pilot light socket assembly _..

No. 47 Pilot light Dial

B85685 R-5 6,8 meg 0.5 watt Carbon 30X508 Dial clamp (upper) 084474 R-6 470.000 ohms 0.5 watt Carbon _.. 30X509 Olaf clamp (lower)

©John F. Rider


RCA MFG. CO.

RCA PAGE 16-1

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2 RCA

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1\ dCh¢IJlKICd r RCA PAGE 16-3

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4 RCA MODEL Q36

RCA MFG. CO.

Alignment

Cathode -Ray Alignment is the preferable method. Connections for the oscilloscope are shown on the Schematic Circuit Diagram.

Output Meter Alignment. -If this method is used, connect the meter across either 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 oscillator 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 attached to the indicator -

drive -cord drum which is mounted on the shaft of the gang condenser.

As the first step in r -f alignment, check the position of the drum, it should correspond to that shown in the Dial Inaicator and Drive Mechanism drawing when the gang condenser 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.

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.

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.

Receiver Dial with Calibration Scale. -To determine the corresponding frequency for any setting of the calibration scales, refer to the dial drawing.

Spread -Band Alignment. -The most satisfactory method of aligning or checking the spread -band ranges is on actual reception of short-wave stations of known frequency, by adjusting the oscillator coil magnetite -core for each spread -band so that these stations come in at the correct points on the dial.

In exceptional cases, when the set is being serviced in a location where the noise level is high enough to prevent reception of short-wave stations, a test -oscillator may be used for alignment, but an extremely high degree of accuracy is required in the frequency settings of the test -oscillator, as a slight error will produce considerable inaccuracy on the spread -band dials. The frequency settings of the test -oscillator may be checked by one or both of the following methods:

1. Determine the exact dial settings of the test -oscillator (for frequencies at or close to the specified alignment frequencies) by zero -beating the test -oscillator against short-wave stations of known frequency.

2. Use harmonics of the standard -broadcast range of a test - oscillator, first checking the frequency settings on this range by means of a crystal -controlled oscillator, or by zero -beating against standard broadcast stations.

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Procedure When a test oscillator is employed tor spread -band alignment, a

final check should be made on actual reception of short-wave stations of known frequency, and the oscillator coil magnetic -core for each band should be retouched so that the stations come in at the correct points on the dial.

Dial -Indicator Adjustment. -After fastening the chassis in the cabinet, attach the dial indicator to the drive cable with the indicator to the line under "Spread Bands" on the glass dial plate with the gang condenser fully meshed. The indicator has a spring clip for attachment to the cable.

For additional information, refer to booklet "RCA Victor Receiver Alignment."

0

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R. P. Wiring, Bottom View

©John F. Rider


RCA PAGE 16-5

Precautionary Lead Dress. - I. All leads in the R.F. assembly should be dressed away from

coils, switch assemblies, capacitors, shield plates, and mounting plates.

2. All capacitors in the R.F. assembly should be dressed apart from each other and away from the Range Switch drive shaft.

3. All indicating light cable leads to S4 should be dressed toward the shield plate and away from all other leads and components.

SOCKETS PLUGS (FRONT VIEW) (more VIEW)

TO C78.- BROWN

DLK- TD OUTPUT RED

PLATEO -BLACK

TO C77 -BLK-RED SRN-BLK

T.B.

BLACK

TD GT. FIL.RE BLK

TO+95`/_ BRN sus TO OUTPUT BlK-BRN SCREEN S

Loudspeaker Connections Loudspeaker. -It is essential that the two speaker cones move

in and out together, i.e. in phase. For an' outline of test methods refer to RCA Victor Supplementary Information -No. 5 "Speaker Phasing."

ALIGNMENT TABLE

Steps Connect the high side of

test osc. to- Tune test

osc. to-

Turn Range Switch to-

Turn Radio Dial to-

Adjust the following for max.

peak output 1 6SH7 I -F grid

in series with .01 mfd.

455 kc "A" Band Quiet

point near 6O35ó c

( )

L30 -L29 2nd I -F trans.

2 6SA7 Det. grid in series with

.01 mfd.

L 1st I trrans.

3 Antenna

in ter teréi

with 200 mmfd.

1500 kc "A" Band 1500 kc (154°)

C16 (osc.) C27 (det.) CB (ant.)

4 600 kc "A" Band 600 kc (35°)

L20 Rock in

5 Repeat steps 3 and 4 until aligned 8

Antenna terminal

in series with 300 ohms

9.5 me "31M" Band

9.5 me (30°)

L22 (osc.) C26 (det.) C3 (ant.)

7 11.8 me "31M" Band

11.8 me (170°)

C22 (osc.)

8 Repeat steps 6 and 7

8

Antenna terminal


9.5 me "B" Band 9.5 me (175.5°)

C17 (osc.)

10 11.8 me "25M" Band

11.8 me (43°)

L23 (osc.) C28 (dot.) C2 (ant.)

11 15.2 me "19M" Band

15.2 me (50°)

L24 (osc.)

12 17.75 me "16M" Band

17.75 me (58°)

L25 (osc.) C39 (det.) C7 (ant.)

19 21.5 me "13M" Band

21.5 me (77°)

L26 (osc.) C37 (dot.) C4 (ant.)

If two peaks can be obtained, use the one obtained when the core screw is farthes out (counter-clockw se).

Use minimum capacity peak if two can be obtained. If two peaks can be obtained use the one obtained when the

core screw is farthest in (clockwise). NOTE: Oscillator tracks above signal on all except the 16M and 13M bands.

RCA MFG. CO.

Alignment Procedure 4. Leads and components connected to the oscillator and lit De-

tector tube sockets must not impede the flexible mounting. 5. The green lead from pin 4 of the oscillator tube socket to pin

4 of the 1st Detector should be dressed close to C54. 6. All excess power transformer leads should be dressed back

between transformer and rear chassis apron and close to chassis base.

7. The capacitors that connect the volume control and tone control should be dressed away from other parts.

MODEL Q36

Dial -Indicator and Drive Mechanism SEE NOTE

BAND INOICATOR WONT

1.26:1244.05C. 21.9 MC.

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A 6 L27 -TOP WHEN REQUIRED, L28 -BOTTOM

INSTALL STOCK 455 RC. NO.32353 WAVE TRAP HERE.

1 -50 -TOP L29 -BOTTOM 455 KC.

TV 17A

4. TD SPEAKERS

Tube and Trimmer Locations (Top View)

Caution. -The sockets used on the band indicator light cables are identical to those used on the speaker cables. In connecting, care should be taken to assure that the cables are plugged to the proper units.

Use of Wave Trap. -Should interference from a powerful nearby station require the use of a wave trap, install a Stock No. 32553 trap behind antenna and ground terminal board as indicated above. Connect coil lug to antenna connection, ground connection is made to chassis through coil mounting foot. Adjust capacitor to resonance with interfering station.

2N0 I.F TRANS.

L 29 65S .

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1ST. I.F TRANS

455 KC.

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5V4

Trimmer Locations (Bottom View)

©John F. Rider


6 RCA MODEL Q36

Model Q36

RCA MFG. CO.

RAPO PWNO SPEECH FULL

RAMO FULL -PHONO

NIGH

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DIAL %

RADIO -PHONO LOINL AND TONE \ F

SWITCH POWER -TONE

CONTROL

Specifications Frequency Ranges Standard Broadcast ("A" Band) 540.1,720 kc (556.174 m)

Medium Wave ("B" Band) 3.0-9.5 me (100-31.6 m)

"31" Meter Spread Band 9.46-11.9 me (31.7-25.4 in)

"25" Meter Spread Band 11.67-15.2 me (25.7-19.8 m)



"13" Meter Spread Band 21.41.22.5 me (14.0-13.4 m)

Intermediate Frequency 455 kc

Tube Complement (1) RCA-6SG7 R -F Amplifier (2) RCA-6SA7 1st Detector (3) RCA-6SA7 Oscillator (4) RCA-6SK7 I -F Amplifier (5) RCA-6SQ7 A -F Amplifier (6) RCA -6R7 Phase Inverter, 2nd Detector (7) RCA-6SK7 Automatic Tone Control (8) RCA-6F6G Power output (9) RCA-6F6G Power output (10) RCA -6Ú5/6G5 Tuning indicator (11) RCA -5Ú4G Rectifier Pilot Lamps 9 -type 47; 6.3 volts, 0.15 amps.

Power Output Rating Undistorted 10 watts Maximum 12 watts

Loudspeakers One Model RL -63L3 and one model RL -63L4 Type (Electrodynamic) 8 inches V -C Impedance at 400 c.p.s. 2.2 ohms

Automatic Tone Control.- The Model Q36 incorporates a circuit for automatically attenuat-

ing noise and selective fading distortion components. Basically the circuit is a combination of a high pass filter and

variable inverse feedback controlled by the AVC voltage. Capacitor C71 (100 mmf.) and resistor R34 (1.2 meg.) couple the

plate of the 6R7 (tube 6) to the grid of the 65X.7 (tube 7). The plate of this tube is connected to the grid of the 6SQ7 (tube 5) through capacitor C67 (82 mmf.). The grid bias for the 6SK7 (tube 7) is obtained from the AVC bus through R16 (2.2 meg.) and 1133 (68M).

The values of C71, R34, C67 and 1133 are such that this inverse feedback loop passes only the high audio frequencies therefore they are the frequencies that are attenuated in the output of the audio system. The amount of attenuation of the 'highs" is controlled by the negative voltage on the AVC bus.

When the incoming signal is weak the AVC voltage is close to zero, the gain of the ATC 6SK7 is large and the attenuation of the highs is a maximum; when the incoming signal is strong the AVC voltage becomes more negative thus decreasing the gain

VOLUME CONTROL

TUNING CONTROL

Location of Controls

25H

A / RANGE

SWITCH

MSM

Victrola Attachment A jack is provided on the rear of chassis for connection to a

Victrola Attachment. The cable from the attachment should be terminated in a Stock No. 31048 plug.

A 110 -volt outlet for Victrola attachment is available on back of the chassis.

Cabinet Dimensions Height 143h inches

244 inches 121/4 inches

Width Depth Net Weight approx. 49 pounds Shipping Weight approx. 56 pounds Chassis Base Dimensions (inches) Height, 31/2; Length, 22;

Depth 13

Over-all Chassis Height 124 inches Tuning Drive Ratio 25 to 1

Power Supply Ratings Symbol Voltages

Rating A Rating B Rating D

105 to 125, nominal 117 105 to 125, nominal 117 (See below)

110 position .... 100 min..... 115 max. 125 position .... 115 min. .... 135 max. 150 position .... 135 min..... 165 max. 210 position .... 190 min..... 230 max. 240 position .... 220 min..... 260 max.

Frequency Watts (cycles)

25 to 60 135 50 to 60 135 40 to 60 135

Note: Shipped in 240 -volt position. To change, remove round cover on top of transformer case and move link to required position.

CAUTION: Remove power cord from line receptacle before changing link position.

and thereby increasing the high frequency response of the audio system. The cathode of the 6SK7 (tube 7) is grounded only when S7 is switched to either "Radio" position; the ATC circuit is in- operative when S7 is in either of the "Phono" positions.

With an R.F. input of 100 microvolts the audio frequency response at 2000 cycles is down approximately 20 db. as compared to the response obtained with an 11F input of 10,000 microvolts.

If desired, the amount of high frequency attenuation at a par- ticular value of input signal below approximately 10,000 microvolts may be varied by changing the value of 1133. Increasing 1133 will increase the attenuation of the "highs"; decreasing R33 will decrease the attenuation.

A quick check of the operation of the circuit may be made by tuning in a weak station and then pulling the 6SK7 (tube 7) out of its socket, a very noticeable increase in the high frequency audio response will indicate that the circuit is functioning properly.

As can be well appreciated by the foregoing explanation of ATC operation, it is desirable to use an antenna with good signal pickup when full fidelity is required. Short length antennas should be avoided whenever possible.

©John F. Rider


RCA PAGE le -7

RCA MFG. CO. MODEL Q36 MODEL Q313

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8 RCA MODELS Q103,-2,A,A-2,Ch.RC1044 RCA MFG. CO. MODELS Q103X, -2 ,AX ,AX -2 , Ch . RC 1044B ' 1 9 4 7.. .. X 1

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R5 101.4

P900O JACK

Rb 500K

IC21 VOLUME T .01

CONTROL

T 1j

0 II

12157 125A7 12557 SOLIST

4

82V

'RB 470K

R9 IDO

C27 03

C 26 if-.v I

s

112. c_ _J

3BZ5GT RECT.

NEATER CONNS.

COIL RESISTANCES LESS THAN IA NOT SHOWN.

MEASUREED WITH VOLTONMYST OR EQUIVALENT.

CATHODE CURRENT

125.57 8.710 125K7 1 L6114A 126Q7 068MA 501.5 33.851M

Scbattatic-Q103, Q103-2, Q103A, Q103A-2

I 17X -44 -a -0.85x -145x- .# -DOx CONY. GAIN 4U RE 436 RO A/4 KC 4005. 600'4$5 NC

MEASURED WITH I.SV FIXLD BIAS

12SA7 1 E OET o 056.

r

ce 470

CÇ14 1 rc6 3-M

711-

7

C6A' Cc NT

/T

41(( i E//R 3 ü üLá' .úú

12,61e 14 SR X040

WAIF.L . Y7

ALL COILf v1X5 WD WITH WAIF.M4M g T1,TALI6AYMY l'RON 0441E010654

4011X TAM

1005% TAI

56

T1

125K7 F 2

R3 3.3 MEG

LIV DIAS FOR GAIN DATA

9 64

Ig5B L_ J

125Q7 253 DET.-A.V.G-A.F

c23 3

475

Rs 01Ae6.

S2 !.

a

2oxl 4001.

ewe 73 SON

c,3,1

i0 VG 5LK

R M. SPEAKER

RIO 1000

PILOTS- MAZM 1490

0- 53

PI

PLU G (Nos.)

5OL6GT OUTPUT

4

'RD 470K

R9 130

1.44 110 V.

POW SR SU PRY

APPROX. GAIN DATA USING CM ANALYST

T3 GR

N. ERN SPEAKER

RIO 1000

POSITION .1. (015.557/1) 2. 3.

AR N6E X 140.375 KC. A 640-1600 KC, C SS- 1I.2P1C.

OSCILLOSCOPE CONN., VER P01RT YCRT.9`TO OIA6f1f

520V. ROWER SUPPLY 12507 IESA7 12SK7 SOLIST

R12 PLUG`22óE )sR

CATNODE.CURRENT 125A7 $27 MA 12517 11.EIMA

!D !7 33.53

HEATER CONN'S

COIL RESISTANCES LESS THAN IO NOT SHOWN. VOLTAGES TO 1140 MEASURED WITH VOLTOMMTST OR EQUIVALENT.

Schematic-Q103X, Q103X-2, Q103AX, Q103AX-2

35Z5GT RE CT D

RII 33

Cts .03

PI Lore - MAZDA 1490

53 Nov DU Y

©John F. Rider


dcl:emc#fce. RCA PAGE 16-9

Cl

SI REAR

C11

C9

\

BAND -SWITCH SHOWN AT 1 ST POSITION.

BROADCAST (A) BAND 540 - 1600 WC.

RCA MFG. CO.

12 SA7 1

sT DET$ OSC.

R

AVC

4

+82V

MODELS Q103,-2,A,A-2

+82V

JN'

L7

Ti 1N'

\ L8 GANGED \ St C8

FRONT

C13 -------- 12

\ Cto C6 L9

\ - -

C11

C9

AVC

GANGED

12SA7 1ST DET4OSC.

R

S1 FRONT

BAND -SWITCH SHOWN C13 3 11

AT 2ND POSITION CLOCKWISE. \ C1DT MEDIUM WAVE (B) BAND \ iI

2.3-7 MC.

4

+82V -

T

7

C 2 2

13 51 I FRONT

L5

51 REAR

C11

7- C9

/

AVC

12 SA7 151. DET.4 OSC.

R

4

+82V

CS y L8«.1

4RÉA

T T

+82v

GANGED51 BAND -SWITCH SHOWN \ FRONT

C13 3

AT 3RD POSITION CLOCKWISE \ cm= Z

SHORT WAVE (C) BAND \ 7.0 - 22 MC.

C4y L7 -1*5, Rf AR

IC4

-;-.C5

T1

C4

@John F. Rider


10 RCA d dá;ilemLK tic it

MODELS Q103X, -2 ,AX,AX-2

C22

51 ;FRONT 51

REAR

CI

BAND- SWITCH SHOWN AT 1ST POSITION.

LONG WAVE (X) BAND 140 - 375 KC.

io

C22

51 FRONT

L3

51 REAR

C11

C9

GANGED

C11

7.C9 /

< \ AVC

GANGED

BAND -SWITCH. SHOWN C13- AT 2ND POSITION CLOCKWISE . cto

BROADCAST (A) BAND 540 - 1600 KC.

RCA MFG. CO.

R1

AVC

R1

C12

C12

12 SA7 I ST DET.f, OSC.

R2

+82V

S1 C7

o -°Nb I 3 12

C 6 C6

12 SA7 1ST DET. OSC.

C22

51 FRONT

L5 LG _,._.C3

51 REAR C11

.C9

\ N

GANGED

AV C

+82v

S1 FRONT

12SA7 15TDET.OSC.

+82v

JN'

L7S C4

8

+82V

JN'

L74

r CS y L8

s1

4 REAR

c S

T1

Si

BAND -SWITCH SHOWN \ FRONT---

AT 3RD POSITION CLOCKWISE . \ coo

3 2

SHORT WAVE (C) BAND T 5.8 - 18.2 MC.

+62v -."÷-

C4 y RE

+82v

.IFI'

T1

C4

©John F. Rider


RCA PAGE 16-11

STOCK wp. 122111 FOR 0103. 0103-2, 010)1. 01030-2 STOCK NO. 12301 FOR 01030. 34-2.010342.0103/01-2

e .au.r

C00T1.0.

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NOTCeI

RCA MFG. CO.

O

023.411T T0W203 TO 1n201221.1CT *KR. Iw C1440 rO0 woo, CRC 4JfJ020

Tabe and Trimmer Locations

Alignment Procedure Cathode -Ray Alignment is the preferable method. Connections for the oscilloscope are shown on the Schematic Circuit Diagram.

Output Meter Alignment.-If this method is used, connect the meter across either 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 oscillator output as low as possible to avoid a -v -c action. Alignment.-With the gang condenser in full mesh, the pointer should be set three inches from the left edge of the dial back plate. This point corresponds to the first mark on the dial scale to the left of "550" kc. on "A" band. To find any calibration point it is necessary to draw a line on the dial scale drawing through the desired freq., so that the line passes through the same reading on the top and bottom rule scales. For instance, 1300 lee. on "A" hand will correspond to a dial indicator setting of 7%" from the LEFT EDGE of the dial back plate. Move the indicator the desired distance by turning the tuning knob. ONCE THE INDICATOR HAS BEEN SET AT FULL MESH. MOVE THE INDICATOR ONLY BY TURNING THE TUNING KNOB.

Alignment Table Q103X, Q103X-2, Q103AX, Q 103AX-2

Steps Connect high side of test-

osc. to- Tune test

osc. to- Range Switch

Move Indicator to-

Adjust following for max. output-

12SK7 I -F grid in series with T2 top and

1 .01 mid. condenser

455 ke A

Band

Quiet point

around

bottom core

12SA7 1st 600 lee Det. grid in TI top and

2 series with .01 mid. condenser

bottom core

3{ Antenna lead 15.2 me C4 osc.t (blue) in 15.2 me C3 ant.: - series with a

C -

L7 osc. 300 ohm Band 4 resistor 6.1 me 6:1 me L6 ant.

S Repeat steps 3 and 4 until aligned

CS osc. 6 1300 kc A 1300 kc I C2 ant.

Band L8 osc.

7 600 ke 600 kc L4 ant.

8 Antenna Repeat steps 6 and 7 until aligned

- lead in series a 200 mmf.

- C6 osc. condenser 350 kc

R 350 kc I Cl ant.

Band - L9 osc.

10 150 kc 150 kc L2 ant.

11 Repea steps 9 and 10 until aligned

MODELS Q103,-2,A,A-2 MODELS Q103X,-2,.AX,AX-2

Dial Indicator Adjwtment.-After the set has been aligned, replace it in the cabinet. Turn the tuning knob until the condenser is in full mesh. The indicator should now be under the first mark on the dial scale face to the left of "SS0" kc on "A" band. If it is not, press out on the metal strip at the bottom of the dial glass. The metal strip will swing out exposing the dial indicator, which may be moved by sliding it along the dial string until it is at the desired point when the gang condenser is fully closed. If the indicator is more than a half inch off, the calibration should be rechecked. Alignment.-The mòst satisfactory method of aligning or checking the ranges is on actual reception of short-wave stations of known frequency, by adjusting the magnetite -core oscillator coil for each band so that these stations come in at the correct points on the dial. In exceptinssal easel, when the set is being serviced in a location where the noise level is high enough to prevent reception of short-wave stations, a test -oscillator may be used for alignment, but an extremely high degree of accuracy is required in the frequency settings of the test -oscillator, as a slight error will produce inaccuracy on the band dials. The frequency settings of the test -oscillator may be checked by one or both of the following methods:

1. Determine the exact dial settings of the teat -oscillator (for frequencies at or close to the specified alignment frequencies) by zero -beating the test -oscillator against short-wave stations of known frequency.

2. Use harmonica of the standard -broadcast range of a test -oscillator, first checking the frequency settings on this range by means of a crystal -controlled oscillator, or by zero -beating against standard broadcast stations.

When a teat oscillator is employed for alignment, a final check should be made on actual reception of short-wave stations of known frequency, and the magnetite -core oscillator coil for each band should be retouched so that the stations come in at the correct points on the dial. For additional information, refer to booklet "RCA Victor Receiver Align- ment." 'Caution: This is an AC.DC type chassis with one side of the power line connected to the metal base, which is also-B. Connection from the signal generator must have a large (.1 MFD) capacitor in the ground side to prevent damage to the generator attenuator, unless the power soyrce to the receiver is isolated from ground.

Alignment Table, 0103, Q103-2, Q103A, 0103A-2

Steps Connect high side of test-

ose. to- Tune test

osc. to- Range Switch

Move indicator to-

Adjust following for max. output-

12SS7 I -F grid In series with T2 top and

1 .01 mfd. condenser

455 kc A

Band

Quiet point

around

bottom core

12SA7 1st 600 kc Det. grid in TI top and

2 series with .01 mid. condenser

bottom core

3{ 18.2 me C4 osc.} 18.2 me C3 ant.:

C L7 osc.' Band

4 7.2 me me L6 ant. Antenna lead

.7.2

(blue) in 5 series with a

300 ohm Repeat steps 3 and 4 until aligned

' - resistor 6.1 me CS osc.f

6 6.1 me B C2 ant. - Band L8 osc.

7 2500 kc 2500 kc L4 ant.

8 Repeat steps 6 and 7 until aligned

C6 osc. 9 1300 kc 1300 kc Cl ant.

Antenna lead A - (blue( in series with a

Band L9 osc.

10 200 mmf condenser

600 kc 600 kc L2 ant.

11 Repeat steps 9 and 10 until aligned

Use min inductance if two peaks can be found. :Use min. capacity if two peaks can be found. :Use max. capacity if two peaks can be found. {Bottom shield cover in place after I -F's are aligned.

©John F. Rider


12 RCA MODELS

MODELS Q103X,-2,AX,AX-2 RCA MFG. CO.

Specifications Frequency Ranges Chassis No. RC -1044 Standard Broadcast ("A" Band) 540-1600 kc (555-187 m) Medium Wave ("B" Band) 2 3-7.0 me (130-42.2 m) Short Wave ("C" Band) 7.0-22 me (42.2-13.6 m)

Frequency Ranges Chassis No. RC -1044B Long Wave ("X" Band) 140-375 kc (2,222-780 m) Standard Broadcast ("A" Band) 540-1600 kc (555-187 m) Short. Wave ("C" Band) 5 8.18.2 me (51.7-16.5 m)


RCA Tube Complement (1) RCA-12SA7 1st Detector -Oscillator (2) RCA-12SK7 1-F Amplifier (3) RCA-I2SQ7 2nd Detector, A.V.C., and A -F Amplifier (4) RCA-50L6GT Power Output (5) RCA-35ZSGT Rectifier

Power Supply Ratings (D -C or 50 to 60 cycles A -C) Q103, Q103-2, Q103X, Q103X-2-105-125 volts 30 watts Q103A, Q103A-2, QI03AX, Q103AX-2-210.250 volta 60 watts Power Output Rating Undistorted 9 watts Maximum 1 5 watts Loudspeaker Type 4 a 6 in. elliptical PM Voice Coil Impedance 3 4 ohms at 400 cycles

Tuning Drive Ratio 20 to 1

Dimensions (Inches) Width Height Depth Cabinet (Outside) 15 9% 7

Chassis Base (Outside) 13 2(' 4%j Chassis Overall 13 9% 434 Weight, Net 9 lbs. Weight Shipping 11 lbs.

Phonograph Attachment.-A jack is provided on the bottom of the chased, for connection to a phonograph. The cable from the attachment should be terminated in a Stock No. 31048 plug. Plug must be removed when radio is in use. When the phonograph is in use the volume control on the radio should be at minimum. Plug -la Resistor.-Either a plug-in resistor or a shorting plug is used with these sets. The plugs are physically interchangeable and may be used to convert the set from 110 to 220 volts or from 220 to 110 volts. DANGER- Do not attempt to use these sets on 220 volts unless the plug-in RESISTOR is used. If the shorting plug is in place, serious damage will result. Consult the instrument label for original rating. Disassembly.-Remove the screws holding the chassis bottom plate to the cabinet. Remove the chassis from the cabinet by removing the knobs and tilting the cabinet so that the chassis will elide back and out. Looking at the chassis from the front, a switch is visible on the left apron in the rear. This is an Interlock switch. The set will not function out of the cabinet unless this switch is closed. A small screw through the interlock actuating arm and the hole in the chassis bottom plate will serve to keep the switch closed. When the chassis is replaced in the cabinet, remove the screw so that the switch will function.

Model Bands Power Supply Cabinet

Q103 "A" -"B" -"C" 110V Brown Q103A "A" -"B" -"C" 220V Brown Q103-2 "A" -"B" -"C" 110V Ivory Q103A-2 "A" -"B" -"C" 220V Ivory Q103X "X" -"A" -"C" 110V Brown Q103AX "X" -"A" -"C" 220V Brown Q103X-2 "X" -"A" -"C" 110V Ivory QI03AX-2 "X" -"A" -"C" 220V Ivory

i\

3 4 5 I6

1 8 9

IItIIIIIlIIIIII 1111111111111Illll ííJ,111(íIlllllllf11Il IlIIIlIl Iflilllll tllllllllllllllIlI ili 1111 It

1 STANDARD 550 600 700 800 1000 1200 1400 1600 BROADCAST Kc 1 1 1 1 I I I I 1 I 1 I I I I

B SHORT

C

1 1 1 1 1 1 i I I 111111 2 3 120 2.5 3.0 90 3.5 4.0 e0 5.0 6.0 49 7 0 MC

WAVE

7.0 40 7.5 8.0 9.0 31 10 25 12 14 19 16 16 18 20 13 22 MC I I

I I I ( I I I I 1 I I( I I I I I( I 1

4 5 6 8 9

[1111111i 1i1I111I 111111111111111lli1 lilt Litt tilltltltll 111I11111111t1i L11I1I111I11111I111111

Reduced Reproduction of Receiver Dial, PC -1044, and Corresponding Rule Scales

3 4

1111t1111111111I JlltIt111t11L

M titis SHORT

5 6

11tItllltlll111Ill1llllllllltll

8

11111I1I1111111 1111111IILllll 1LI

eggall-1

49 40 31 25 9 16 mimes

6 65 1 8 9 10 12 14 16 18 WAVE Mc t 1 1 1 1 1 1 1 I l l l I l 1 l 1 1 1 1 I

X STANDARD

1111 T I I I 1 I I 1 1 1 I II 550 600 700 800 1000 1200 1400 1600 KC

saoAocAST 140 160 200 250 300 375 KC

I I I I I I I I I I I I I 1

4 5 6 7 8 9

111111111111111 111'111I111I1111111111I1111I1 111I111I1111111 Illlllllll11111I1111111Ii111111 11111

Reduced Reproduction of Receiver Dial, RC -1044B, and Corresponding Rule Scaler

The corresponding position of the dial indicator in inches, from the left hand edge of the dial plate, for any frequency can be determined by drawing a line from the frequency to a point on the bottom rule scale passing through the same point on the top rule scale. For example 600 kc on the dial scale corresponds to a dial indicator setting of 4'4" from the left hand edge of the dial plate, etc. Read instructions under "Alignment Procedure."

©John F. Rider


RCA PAGE 16-13

RCA MFG. CO.

PRECAUTIONARY LEAD DRESS

1. Dress output plate capacitor and output transformer leads down next to chassis.

2. Dress 12SQ7 grid resistor down next to chassis, and away from power ground wire to switch.

3. Dress lead from 2nd I -F transformer to volume control down to chassis and away from adjacent parts.

4. Keep grid end of RI as short as possible.

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.

SHOWN WITH

GANG CONDENSER AT MAXIMUM

CAPACITY

3i TURNS

.22

Dial -Indicator and Drive Mechanism

Q103, QI03A Q103X, QI03AX

10l)->

Replacement Parts

MODELS Q103,-2,.A,A-2 MODELS Q1O3X,-2,AX,.AX-2

Q103-2, Q103A-2 Q103X-2, QI03AX-2

4--44E

STOCK NO. DESCRIPTION STOCK

NO. DESCRIPTION

CHASSIS ASSEMBLIES 30649 Resistor -2.2 megohms, 'z watt (R1) RC -1044-Q103, 0103-2, QI03A, Q103A-2 31417 Resistor -3.3 megohms, )s watt (R3)

RC-1044B-Q103AX, Q103AX-2, Q103X, Q103X-2 30992 Resistor -10 megohms, ' watt (R5) '72577 Shaft -Tuning knob shaft

/2306 Capacitor -Mica trimmer, 3-30 mmf. (C3) 71115 Socket -Lamp socket /2307 Capacitor -Mica trimmer, 5-50 mmf. (C4) /2295 Socket -Phono -input socket (JI) 39616 Ca acitor-Mica 33 mmf. (C6A for Q103AX, Q103AX-2, 37605 Socket -Tube socket

103X, Q103X-2) 31319 Socket -Tube socket 39622 Capacitor -Mica, 56 mmf. (C12) 70390 Spring Drive cord spring

*72794 Capacitor -Ceramic, 170 mmf. (C7 for Q103AX, Q103AX-2, '72745 Switch -Interlock switch, slide type, D.P.D.T. (S3) Q103%, Q103X-2) '72304 Switch -Range switch (SI)

39636 Capacitor -Mica, 220 mmf. (C11) /2545 Transformer -First I. F. transformer (T1) 72571 Capacitor -Mica, 330 mmf. (C23) 70918 Transformer -Second I. F. transformer (T2)

'72814 Capacitor -Ceramic, 470 mmf. (C8) '72296 Transformer -Output transformer (T3) /2305 Capacitor -Mica trimmer, comprising 2 sections of 2-20 mmf.

and 2 sections of 5-50 mmf. (C1, C2, C5; C6) 33726 Washer -"C" washer for tuning shaft

/2795 Capacitor -Mica, 2760 mmf. (C7 for Q103, Q103-2, Q103A, Q103A-2)

SPEAKER ASSEMBLIES 922258-2

/2637 '71699

Capacitor -Mica, 3900 mmf. (C13) Capacitor -Molded paper, .005 mfd., 400 volts (C24, C25)

71058 Speaker -4' z 6' P.M. speaker complete with cone and voice coil.

71770 Capacitor -Molded paper, .01 mfd., 400 volts (C21, C22) NOTE: If stamping on speaker in instrument does not agree '72815 Capacitor -Molded paper, .03 mfd., 400 volts (C27) with above speaker number, order replacement parts /1702 Capacitor -Molded paper, .05 mfd., 400 volts (C16, C28) by referring to model number of instrument, number /2281 Capacitor -Electrolytic, comprising 1 section of 80 mfd., 150

volts, 1 section of 40 mid., 150 volts and 1 section of 20 mfd., 25 volts (C26)

stamped on speaker and full description of part required.

MISCELLANEOUS 72576 Coil -Antenna coil, "A" band (LI, L2 for Q103 and QI03A,

Q103-2, Q103A-2; L3, L4 for Q103AX, Q103X, Q103X-2, 71122 Baffle -Speaker baffle Q103AX-2) *71123 Bottom -Case bottom

/2298 Coil -Antenna coil, "B" band for Q103, Q103-2, Q103A, and Q103A-2 (L3, L4)

Y1354 Cabinet -Brown plastic cabinet for QI03, Q103A, Q103E, Q103AX

'72299 Coil -Antenna coil, "C" band for Q103, Q103-2, Q103A, and 0103A-2 (L5, L6)

Y1355 Cabinet -Ivory plastic cabinet for Q103-2, Q103A-2, Q103X-2, Q I03AX-2

*72276 Coil -Antenna coil, "C" band for Q103AX, Q103AX-2, Q103X, *72578 Clamp -Dial clamp (2 required) 0103X-2 (L5, L6) *72686 Decal -Power switch decal

*72297 Coil -Antenna coil, "X" band for Q103AX, QI03AX-2, Q103X, Q103X-2, (L1, L2)

*72687 Decal -Range switch decal for Q103AX, Q103AX-2, Q103X, Q103X-2

*72575 Coil -Oscillator coil, "A" band (L9 for Q103, Q103A, 103-2, Q103A-2, L8 for Q103AX, Q103X, Q103X-2, Q103AX-2)

*72747 Decal -Range switch decal for Q103, Q103-2, Q103A and Q103A-2

/2302 Coil -Oscillator coil, "B" band for Q103, Q103-2, Q103A, and *72609 Dial -Glass dial scale for Q103, Q103A, Q103-2,QI03A-2 Q103A-2 (L8) *72610 Dial -Glass dial scale for Q103AX, Q103X, Q103 -2,

/2303 Coil -Oscillator coil, "C" band for Q103, Q103-2, Q103A, and Q103AX-2 103A-2 (L7) 71127 Foot -Cabinet foot (walnut) for Q103, Q103A, Q103AX, Q103X

*72274 Coil -Oscillator coil, "C" band for Q103AX, 0103AX-2, Q103X, (4 required) 0103X-2 (L7) 71128 Foot -Cabinet foot (ivory) for Q103-2, Q103A-2, Q103AX-2,

*72300 Coil -Oscillator coil, "X" band for Q103AX, Q103AX-2, Q103X-2 (4 required) Q103%, Q103%-2 (L9) 70473 Knob -Tuning knob (walnut) for Q103, Q103A, Q103AX,

'72294 Condenser -Variable tuning condenser (C9, C10) Q 103X 38410 Control -Volume control and power switch (R6, S2) 70474 Knob -Tuning knob (ivory) for Q103-2, Q103A-2, Q103AX-2, 34662 Cord -Drive cord (approx. 56 overall length) Q103X-2 70384 Drum -Drive drum *72549 Knob -Volume control or range switch knob (walnut) for 72283 Grommet -Rubber grommet for mounting tuning condenser Q103, Q103A, Q103AX, QI03X

and speaker *72550 Knob -Volume control or range switch knob (ivory) for 70429 Grommet -Rubber grommet for mounting tube socket Q103-2, Q103A-2, QI03AX-2, Q103X-2

'72547 Indicator -Station selector indicator 71126 Nut -Speed nut to fasten hand grip screen (4 required) 71116 Lamp -Dial lamp, Mazda No. 1490 *72291 Plug -Shorting plug for Q103,' Q103-2, Q103X, QI03X-2 /2548 Plate -Dial back plate complete with drive cord pulleys *72308 Resistor -Plug-in resistor for Q103A, Q103A-2, Q103AX and 36230 Pulley -Drive cord pulley Q103AX-2 (R12) 71290 Resistor -33 ohms, 1 watt (R11) 71125 Screen -Protective screen for hand grip 30880 Resistor -150 ohms, 4 watt (R9) '72746 Slide -Interlock switch actuating slide 71916 Resistor -1000 ohms, 1 watt (RIO) 30900 Spring -Retaining spring for knobs 30685 Resistor -33,000 ohms, % watt (R2) 71130 Spring -Retaining spring for front strip 30787 Resistor -47,000 ohms, watt (R4) 71129 Strip -Finished strip for cabinet front 30648 Resistor -470,000 ohms, watt (R7, R8) 34373 Washer -"C" washer to hold interlock actuating

*This is the first time this Stock No. has appeared in Service data.

©John F. Rider


14 RCA

©John F. Rider


' d ti;heonaticd RCA PAGE 16-15

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©John F. Rider


16 RCA MODEL Q121

RCA MFG. CO.

Alignment Procedure Cathode -Ray Alignment is the preferable method. Connections

for the oscillograph are shown on the Schematic Circuit Diagram. Output Meter Alignment.-Il this method is used. connect the

meter across the voice coil, and turn the receiver volume control to maximum.

Teat-Oscillator.-For all alignment operations, connect the low side of the test -oscillator to the receiver chassis, and keep the oscillator 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 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 "180°" mark on tho 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.

To determine the corresponding frequency for any setting of the calibration scales, refer to the calibration scale drawing which shows the dial with 0-180° calibration scales drawn .at top and bottom.

Pointer for Calibration Seale.-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 "180°" 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 (the first mark on "A" band to the left of "550"), and gang condenser fully meshed. The indicator has a spring clip for attachment to the cable.

Dia! -Indicator and Drive Mechanism

Spread -Band Alignment.-The most satisfactory method of aligning or.checking the spread -band ranges is on actual reception of short-wave stations of known frequency, by adjusting the magnetite -core oscillator coil for each spread -band so that these stations come in at the correct points on the dial.

In exceptional cases, when the set is being serviced in a location where the noise level is high enough to prevent reception of short- wave stations, a test -oscillator may be used for alignment, but an extremely high degree of accuracy is required in the frequency settings of the test-oscillaor,- as a -slight error will produce considerable inaccuracy on the spread -band dials. The frequency settings of the test -oscillator may be checked by one or both of the following methods:

1. Determine the exact dial settings of the test -oscillator (for frequencies at or close to the specified alignment frequencies) by zero -beating the test -oscillator against short-wave stations of known frequency.

2. Use harmonics of the standard -broadcast range of a test -oscillator, first checking the frequency settings on this rangeey means of a crystal -controlled oscillator, or by zero -beating against standard broadcast stations.

When a test oscillator is employed for spread -band alignment, a final check should be made on actual reception of short-wave stations of known frequency, and the magnetite -core oscillator coil for each band should be retouched so that the stations come in at the correct points on the dial.

C3^^ V

5 6 IST. DE T. -

05C.

Tocw 9- BRN

C16 I'

FRONT TO Cto (G1;1

TO A

TYELLOW S

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TWIST AROUND YEL. LEAD

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C12

GEN BLUE

11111311111e*

MIT L12

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Q32 R.F. WIRING DIAGRAM

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3

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LS

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(tSCTTpM VIr:W)

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Z

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LG

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SAME -OIL

SAME COIL

P-92070

Steps Connect the high side of the test -one.

to- Tune test- osc. to- Range

switch Turn radio

dial to- Adjust the

following for max. peak

output 66IC7 I -F

1 grid in series with mfd.

L15 and L16 2nd I -F .01 Quiet Trans.

6SA7 1st 455 kc A Point 2 Det. grid in

series with near l60ß

L13 and L14 1st I -F

.01 mid. Trans.

3 11.8 me 138.50 L 1 1 (osc.)

Cl (ant.) 25 M

4 170 C14 (osc.) 15.2 me

5 Ant. lead in series

Repeat steps 3 and 4

6 15.2 me 19-13 M 1560 L12 (ose.) with 300 ohms

L10 (one.)" 7 9.5 me 31 M 1560

C2 (ant.)

8 9.5 me B 11.50 C7 (osc.)

9 1,500 kc 280 C4 Colic.)

Ant. lead in series A

C3 (ant.)

L6 (one.) 10 with 200 mml.

600 kc 1500 (Rock gang)


* Use minimum capacity peak if two can be obtained. Check image to determine that C14 has been adjusted to the correct peak by tuning receiver to approximately 14.29 me (29°) where a weaker signal should be received.

If two peaks can be obtained use the one obtained when the core screw is farthest out (counter -clockwise).

Peak at minimum capacity if two peaks can be obtained. NOTE: Oscillator tracks above signal on all bands.

RANGE SAATC TUNING

SLUE. -ANT SLACK -600.

oaC IL DET.

Ì L13TOD Lll BOTTOM ADJ. 455 KC

F

OLU Ma

CONTROL

LIS BOTTOM LIB TOP

ADJ. 455 KC

29 OFT AE AVE.

POWER TRANS.

PRASE INS. OUTPUT SECT OUTPUT

PHONO JACK LINE VOLTAGE SWITCH ON 229/ 110V UNIVERSAL O MODss ONLY

as Tv 2

Tube and Trimmer Locations

o Y

W i-

©John F. Rider


RCA PAGE 16-17

RCA MFG. CO. MODEL Q121

,.. LOW FULL

TONE CONTROL

SOFT OFF

LOUD

POWER -VOL. CONTROL

TUNING CONTROL

Location of Controls

RANGE SWITCH

CABLE SOCKET (FRONT, V EW) MS -I BLACK

A 0 BLACK }TO OUTPUT PLATES

BIN -BRN-70 OUTPUT SCREENS

BROWN -RECTIFIER FILAMENT

Connections and Colors of Loudspeaker and Cable for Chassis No. RC -507

Electrical and Mechanical Specifications

Chassis No. RC -507U differs from Chassis No. RC -507 in that it is equipped with a permanent magnet dynamic loudspeaker. Other

Frequency Ranges Standard Broadcast ("A" Band) 540-1,720 kc (556-174 m)

Medium Wave ("B" Band) 3.0-9.5 me (100-31.6 m)

"31" Meter Spread Band 9.5-11.7 me (31.6-25.6 ml

"25" Meter Spread Band 11.7-15.1 me (25.6-19.9 m)

"19-13" Meter Spread Band 15.1-22.5 me (19.9-13.3 m)

Intermediate Frequency

Tube Complement (1) RCA-6SA7 ist Detector -Oscillator (2) RCA-6SK7 I -F Amplifier (3) RCA-6SQ7 2nd Detector, A -F Amplifier, A.V.C. (4) RCA-6AD7-G Phase Inverter, Power Output (5) RCA -6F6 -G Power Output (6) RCA -5Y3 -GT Rectifier

455 kc

Power Output Rating Undistorted 3 watts Maximum 3.5 watts

Loudspeaker Chassis No. RC -507 Identification No. 92517-1 Type (Electrodynamic) 61/2 inches V -C Impedance at 400 c.p.s. 3.4 ohms Chassis No. RC -507U Identification No. 92570-1 Type (P.M. dynamic) 61/2 inches V -C Impedance at 400 c.p.s. 3.4 ohms

180 170 I80

31

than the loudspeaker and required changes to the power supply filter, and output tubes bias circuits, the chassis are identical.

Cabinet Dimensions (Inches) Height Width Depth

Q121 (Plastic) 107/s 1614 75/s

Net Weight (pounds) 21

Shipping Weight (pounds) 25 Chassis Base Dimensions (inches) Height, 23/4; Width, 151/4:

Depth, 51/4

Over-all Chassis Height 9"4 inches Tuning Drive Ratio 25 to 1

Power Supply Ratings

Symbol Rating A Rating B

Rating C

Frequency Voltages (cycles) Watts

105 to 125 volts, 117 nominal 25 to 60 65 105 to 125 volts, 117 nominal 50 to 60 65

( 105 to 125 volts, 117 nominal 50 to 60 65

1210 to 250 volts, 234 nominal }

(Shipped in 210-250 volt position)

Phonograph Attachment.-A jack is provided on the rear of chassis for connection to a Phonograph Attachment. The cable from the attachment should be terminated in a Stock No. 31048 plug.

When Phonograph is not in use its plug should be removed. When Phonograph is in use the volume control on the radio should be at minimum and, if necessary, tune set off frequency from any very strong station.

150 140 130 120 110 100 90 80 70 80 50 40 30 20 10 0

F....,,.,I,,..I.,..,..I..,4 I-, ...i u u I I

0 5 10 15 20 25 3c 35 40 45 50

25 ( A

° 9.5 9.6 9.7..,.9.8. 10.0

,,.i,,,,,o.,.I,,,,l 50 55 60 65 TO T5 BC B5 90

10_5_ ,11_ 0. .,12.0 mc)) 31

11.7. ,11.8,,,.11.9. °12.1 .12.5.. .13.0 M.

14.0 15:0 mc

550 600 700 800 1000 1200 1400 1700

) 25

A p=q

100 105 110 t15 120 125 IJC 0 I5 200 205

19-13 151,.152 153. 154. 156 160 110 180 200 220 I9 METERS 16 METERS I3 METERS

II IIIIIII II IIIII IIII IRI111111IIIII I11(I III IIIII I IIIIIIIIIIIIIlI111111Ii lll ITIIIIIIII I I III I IIIIRIIIIriI II I I1II IIIIIIIIIIIIIIIII IIII I IIIII III11I111I1i IIIII I I IlrliIIIIII111111IIIII II

180 170 160 150 140 130 120 110 100 90 I 80 70 80 50 40 30 20 10 0

19-13

2759B

Reduced Reproduction of Receiver Dial, and Corresponding 0-180° Calibration Scales

The corresponding position of the dial indicator for any setting of the calibration scale can be determined by drawing a line from this point on the bottom calibration scale to the same point on the top calibration scale. For example 150° on the calibration scale corresponds to 600 ka on "A" band, etc. Read instructions under "Alignment Procedure."

©John F. Rider


18 RCA MODEL Q121

RCA MFG. CO.

T1 SECONDARY

TO PLATE 6A07 G

TO PLATE EFE G

LINE ON SPEAKER

PLUG

C29 10

tv1FD

T? OUTPUT TRANS.

TO 0+ BUS

R19 3300

336V 2356

LIJ

LI, Cao C40 10 8

MFD MFD

rnS 119

Chassis No. RC -507U Power Supply Circuit Diagram

Replacement Parts

PLUG (PRONG VIEW)

LINE

SOCKET (FACE VIEW)

T2

BRN BLK

BLK RED 'C29

BLK AD7G PLATE

BLK RED TR--a'6F6G PIAEE

545230

Connections and Colors of Loudspeaker and Cable for Chassis No. RC -5071.1

NOTE: The replacement parts listed below are apnlicable to both chassis except where specifically indicated.

STOCK No. DESCRIPTION


CHASSIS ASSEMBLIES 30493 Resistor -150,000 ohms, 1/2 watt (R14) RC -507 and RC -507U 14983 Resistor -330,000 ohms, 1/4 watt (R12)

30648 Resistor -470,000 ohms, 1/2 watt (R11, 1516) 35622 Bracket-Flywheel and tuning shaft mounting support 30652 Resistor -1 megohm 1/4 watt (RI) 37976 Bracket-Support bracket for tone control 30649 Resistor -2.2 megohms, 1/4 watt (R3) 35642 Calibrator-Drive drum calibrator 30992 Resistor --I0 megohms, 1/4 wdtt (RIO) 12714 Capacitor-Air trimmer, 2-12 mm!. (C4, C7, C14) 14350 Screw-#8-32 square head set screw for drive drum 34654 Capacitor-Mica trimmer, comprising three sections of 35633 Shaft-Extension shalt for range switch

2.5-10 mmf. (C1, C2, C3) 35637 Shaft-Tuning knob shaft 35646 Capacitor-Ceramic, 6 mmf. (C36) 31364 Socket-Lamp socket 36012 Capacitor-Ceramic, 15 mmf. (C37) 14278 Socket-Phono input socket 39041 Capacitor-Ceramic, 18 mmi. (C33) 31251 Socket-Tube socket 70582 Capacitor-Ceramic, 47 mmi. (C8, C12) 31261 Spring-Retaining spring for oscillator coils core and studs 39622 Capacitor-Mica, 56 mmi. (C17) 31418 Spring-Tension spring for drive or indicator cord 35645 Capacitor --Ceramic, 68 mmf. (CI3) 35640 Support-Drive cord pulley support complete with one 70586 Capacitor-Mica, 68 mmf. (C9) pulley 39628 Capacitor-Mica, 100 mmf. (C15, C18, C34) 35639 Support-Drive cord pulley support complete with three 39636 Capacitor-Mica, 220 mmf. (C16, C38) pulleys 70667 Capacitor-Mica, 560 mmf. (C5) 35621 Switch-Range switch (SI, S2, S3, S4) 70687 Capacitor-Mica, 3000 mmi. (C6) 32827 Switch-Voltage change switch (S5) 70585 Capacitor-Tubular, .0015 mid., 1500 volts (C23) 35636 Transformer-First I -F transformer (L13, L14, C15, C18) 70644 Capacitor-Tubular, .0025 mfd., 700 volts (C25) 35628 Transformer-Second I -F transformer (L15, LI6, C20, C21) 70627 Capacitor-Tubular, .005 mfd., 500 volts (C24( 32852 Transformer-Power transformer, 117 or 235 volt, 50 to 60 70648 Capacitor-Tubular, .005 mfd., 1000 volts (C27, C26) cycle (Rating 'C") (T1) 70610 Capacitor-Tubular, .01 mfd., 400 volts (C28. C39) 35588 Transformer-Power transformer 117 volt, 25 to 60 cycle 70614 Capaçitor-Tubular, .035 mfd., 400 volts (C22) (Rating "A") (T1) 70615 Capacitor-Tubular, .05 mfd., 400 volts (C19, C35) 2917 Washer --"C" washer to fasten tuning shaft 33014 Capacitor-Electrolytic, comprising 3 sections of 10 mfd.,

450 volts, and 1 section of 20 mfd., 25 volts (C29, C30, C31 C32)

33726 Washer-"C" washer to fasten idler pulley

72139 Capacitor-Electrolytic, 8 mid., 450 volts (RC 507U only) SPEAKER ASSEMBLY (C40) Stamped 92517-1)

35632 Coil-Antenna coil, "A", "B" and 31 meter bands (L4, L5, L6, L7 L18)

(For RC -507 only)

35631 Coil-Antenna coil, spread band (LI, L2, L3) 70578 Cone-Cone and voice coil assembly 35823 Coil-Oscillator coil, "A" and "B" band (L8, L9) 5118 Plug -4 prong male speaker plug 35624 Coil-Oscillator coil, 19-13 meter band (L12) 70583 Speaker -61$" E.M. speaker complete with cone and voice 35625 Coil-Oscillator coil, 25 meter band (LI1) coil, less output transformer and plug 35626 Coil-Oscillator coil, 31 meter band (L10) 70584 Transformer-Output transformer (T2) 35619 Condenser-Variable tuning condenser (C10, C11) 35629 Control-Tone control (R9) 35620 Control-Volume control and power switch (R6, S6) SPEAKER ASSEMBLY 32634 Cord-Drive cord (approx. 28" overall length) Stamped 92570-1) 34662 35788

Cord-Indicator cord (approx. 53" overall length) Core-Adjustable core and stud for "A" and "B" band

(For RC -507U only)

oscillator coil 72425 Speaker -61/2" P.M. speaker complete with cone and voice 31259 Core-Adjustable core and stud for 19-13 meter band, 25 coil, less output transformer and plug

meter bond and 31 meter band oscillator coils 31539 Plug -5 prong speaker plug 35627 Drum-Drive drum less calibrator 70584 Transformer-Output transformer (T2) 35638 Flywheel-Tuning shaft flywheel 70930 Grommet-Rubber grommet for mounting tuning condenser

(4 required) MISCELLANEOUS 5040 Plug -4 contact female plug for speaker cable (RC -507

only) *72143 Back-Cabinet back 12493 Plug -5 contact female plug for speaker cable (RC -507U 70833 Board-Baffle board and grille cloth

only) Y1382 Cabinet-Plastic cabinet 35641 Pulley-Drive cord pulley 70579 Decal-Trade mark decal 35630 Pulley-Idler pulley 35654 Dial-Glass dial scale 34761 Resistor -10 ohms, 1q watt (R18) 35647 Frame-Dial frame only less Indicator and dial 30735 Resistor -560 ohms, I watt (RC -507 only) (R15) 70580 Indicator-Station selector indicator 39050 Resistor --820 ohms, 1 watt (RC -507U only) (R15) 35651 Knob --Range switch knob 48674 Resisto'. -3.300 ohms, 4 watt (RC -507U only) (R19) 35652 Knob-Range indicator knob 30436 Resistor -12,000 ohms, 1,4 watt (R7) 35650 Knob-Tone control knob 35595 Resistor -15,000 ohms, 3 watt (R4) 34489 Knob-Tuning or volume control knob 30492 Resistor -22,000 ohms, 1/4 watt (R5) 11691 Lamp-Dial lamp, Mazda 44 30685 Resistor -33,000 ohms, 1/4 watt (R2) 14270 Spring-Retaining spring for knobs #34489, 35650 or 35651 30180 Resistor -120,000 ohms, 1/4 watt (R13) 4962 Spring-Retaining spring for knob #35652

©John F. Rider


RCA PAGE 16-19

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©John F. Rider For parts list, see P.16-7


11

PAGE 16-20 RCA dCilelllCKl,Cd fr

MODEL Qß13 RCA MFG. CO.

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©John F. Rider


\\ ceiZeihuatics RCA PAGE 16-21

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RCA MFG. CO.

VN

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©John F. Rider


22 RCA urimilied schema -ties

MODEL QB13 RCA MFG. CO.

,3M1

-

_«1

O L3 251,1

Si FRONT.

t__ _ , I

THROUGH CONNECTION I

BOTTOM VIEW OF TUBE SOCKETS. M=1000 RANGE SWITCH VIEWED FPOM FRONT AND SHOWN 11419-13 METER.BAND POSITION.

BROKEN LINES (-- ) AND GROUND SYMBOLS - DENOTE CIRCUIT CONNECTED TO CHASSIS GROUND THRU RANGE SWITCH CONTACTS.

-J

cio 52 REAR

uo_L 11-4eo-1

S3 REAR

C13 -

6B '- C14 2-I2

- 54 FRONT

V-1 65A7

lf-TDET--OSC.

AY.C.

CISG M 7 38

C36 6

P925219 -E

Simplified Schematic Diagram Antenna & Oscillator Circuits

"19-13 Meter Band"

NOTE:

This is a partial schematic diagram showing only the antenna and oscillator tuned circuits which are connected for the

designated switch position.

©John F. Rider


RCA PAGE 16-23

RCA MFG. CO.

Alignment Procedure

Cathode -Ray Alignment is the preferable method. Connections for the oscilloscope 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 oscillator 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 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.

As the first step in r -f alignment, check the position of the drum. The "180°" mark on the drum scale must be vertical and dire tly over the center of the gang -condenser shaft when the plates ate 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 th'e correct position.

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 "I80°" mark on the calibration scale when the plates are fully meshed. The correct setting of the gang in degrees, for each alignment frequency, is given in the alignment table.

Receiver Dial with Calibration Scale.-To determine the corresponding frequency for any setting of the calibration scales, refer to the dial with calibration scale drawing.

Dial -Indicator Adjustment.-After fastening the chassis in the cabinet, attach the dial indicator to the drive cable with indr`.cator at the 540 kc mark, and gang condenser fully meshed. The indicator has a clip for attachment to the cable.

Spread -Band Alignment.-The most satisfactory method of aligning or checking the spread -band ranges is on actual reception of short-wave stations of known frequency, by adjusting the oscillator coil magnetite - core for each band so that these stations come in at the correct points on the dial.

In exceptional cases, when the set is being serviced in a location where the noise level is high enough to prevent reception of short-wave stations, a test -oscillator may be used for alignment, but an extremely high degree of accuracy is required in the frequency settings of the test -oscillator, as a slight error will produce considerable inaccuracy on the spread -band dials. The frequency settings of the test -oscillator may be checked by one or both of the following methods:

I. Determine the exact dial settings of the test -oscillator (for frequencies at or close to the specified alignment frequencies) by zero - beating the test -oscillator against short-wave stations of known frequency.

2. Use harmonics of the standard -broadcast range of the test -oscillator, first checking the frequency settings on this range by means of a crystal calibrator, or by zero -beating against standard broadcast stations.

When a test oscillator is employed for spread -band alignment, a final check should be made on actual reception of short-wave stations of known frequency, and the oscillator coil magnetite -core for each band should be re -touched so that the stations come in at the correct points on the dial.

51 (FRONT)

SZ (REAR

54 (FRONT) r 1

C14 53 (REAR)

2S M OSC. COIL

fr2®

19-13M 05C COILS

C4

/"J4 e 4\/4 L9 CD

A -B OSC.COILS

eg_D) 31M

OSC COIL

SAME

4 COII. o

© 25-19-13M ANT. COILS

L4 LS

L7 LIS

LI L2 L3 ©

\ SAME COIL

á+-B-31 M ANT. COI LS

DV2

Coil and Band Switch Locations (Bottom Chássis View)

Precautionary Lead Dress. 1. Twist yellow lead from terminal 14 of L8 to terminal 6 of S3 with the

lead from terminal 27 of L12 to terminal 5 of S4. 2. All other oscillator coil leads must be kept apart from each other as

well as from other leads and parts. No two leads may be less than inch apart.

3. The lead from the tap on 19-13 oscillator coil to pin number 6 (K) of 6SA7 socket should be dressed up and away from all parts as far as possible.

4. Condensers C8, C9 and C16 must be as far away from all metal parts as possible.

5. All leads from the antenna coil to the range switch should be dressed together.

MODEL QB13

Steps

Connect the high side of the test-osc. to-

Tune test- osc. to-

Range switch

Turn radio dial

to-

Adjust the fol - lowing for max. peak

output

1

I -F grid in series

with .01 mfd. 455 kc A

Quiet point

near 180°

LI6-L15 2nd I -F

transformer

2 1st Det. grid, in series with

.01 mfd.

L14-L13 1st I -F

transformer 3Lll Ant. lead


11.8 me 25M

138.5° (osc.)*

Cl (ant.)

4 15.2 me 17° C14 (osc.)***

5 Repeat steps 3 and 4.

15.2 me 19-

13M 156° L12 (osc.)*

9.5 me 31M 156° LIO (osc.)*

C2 (ant.)

8 9.5 me B 11.5° C7 (osc.)**

Ant. lead in series with

mint m

kc A

26° C4 (inc.)**1,500

C3 (ant.)

10 600 kc 150° y8 (osc.)*

(Rock gang.)


*If two peaks can be obtained, use the one obtained when the core screw is farthest out (counter -clockwise).

**Use minimum capacity peak if two can be obtained. ***Use minimum capacity peak if two can be obtained. Check image to

determine that C14 has been adjusted to the correct peak by tuning receiver to approximately 14.29 me (29°) where a weaker signal should be received.

NOTE: Oscillator tracks above signal on all bands.


BAND SWITCH - TUNING ' IR -VOLUMI

C7 LB LC4 LIiT00-L15IOTTOM 9.5MC 600KC. 1500KC. 455KC.

Tube and Trimmer Locations (Top Chassis View)

6. The green lead from pin 4 (SG) of 6SA7 socket to pin 6,(SG) of 6557 socket should be dressed down against the chassis and away from the I.F. terminals.

7. All leads and parts must clear the tuning flywheel by at least 3/ inch 8. The leads to the power switch should be twisted together and dressed

away from other leads and parts as much as possible. 9. Capacitor C34 must be mounted edgewise and close to the chassis

with the leads as short as possible. 10. The green lead from term. C of 1st I -F trans to

pin 4 (G) of 6SS7 must be short and close to chassis under all other leads.

©John F. Rider


24 RCA

31 (

MODEL QB13

Frequency Ranges Standard Broadcast ("A" Band) Medium Wave ("B" Band) "31" Meter Spread Band "25" Meter Spread Band 11.7-15 me (25.6-20 m) "19-13" Meter Spread Band 15.1-22 me (19.9-13.6 m)


RCA MFG. CO.

RCA Tube Complement RC -529A RC -612

Electrical and Mechanical Specifications Power Supply Rating With vibrator power supply unit (RS -115): 6.3 volts, total current drain *RC -529A 3 35 amperes

RC -612 3.2 amperes *If both tube substitutions are made, the total current consumption will

be increased to 3.65 Amperes.

540-1,720 kc (555-174 m) 2 9-9.5 mc (103-31.6 m)

9 5-12 Toc (31.6-25 m)

(1) RCA-6SA7 RCA-6SA7 1st-Det.-Osc. (2) RCA -6S76 RCA-6SS7 I -F Amplifier (3) RCA -6T7 -G6 RCA-6AQ6 2nd-Det.. A.V.C., and 1st Audio (4) RCA -6J7 RCA-6AK6 Driver (5) RCA -6Z7 -G RCA-6Z7G Power Output

*In some units, a 6K7 may be substituted for the 6S7 and a 6Q7 in place of the 6T7G.

POWER- VOL. TUNING RAGE CONTROL CONTROL SwIeca

Power Output Undistorted Maximum

RC -529A 3 1 watts 4 5 watts

RC -612 2.1 watts 3.1 watts

Loudspeaker (92519-1) Type 6y5 inch, permanent -magnet dynamic Voice -coil Impedance at 400 cycles 3 4 ohms

Height Length Depth Cabinet Dimensions { QB12 & QBl3....... 1011 %' 16' 7W

Net Weight QB11 21.5 lbs. QB12 & QB13 20.0 lbs.

Tuning Drive Ratio 2.5:1

Phonograph Attachment A jack is provided on the rear of chassis for connecting a Phonograph at-

tachment to the audio amplifying circuit. When Phonograph attachment is in use, the volume control on the radio

should be at minimum, and, if necessary, tune set off frequency from any very strong station.

When Phonograph attachment is not in use its plug should be disconnected. Location of Controls

RECEIVER DIAL WITH CALIBRATION SCALE

180 170 180 ISO 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 L1111111J111J111L1111,1d111111111L111,11J111d1111L111111J111J1111n11L111L11 1 6 111111n1111J111Jf1,11111J111J11111111111,IJ1111l11J11111111,L1111n1d1111

,...,1 .. ...........1r.,.,.,,.,..,.,...,1..,.1.,, .1 O 5 ' 10 15 20 25 30 35 40 45 50

9.5 . 9.6 . . .9.7 ..,.9.8. . 10.0 10.5 11.0 12.0 mc

31

B 38 4 4 n=1Fº, C 4 IV MEIFR, C 6 78 9 5 mc B

eo es To Ts eo es 90

11.7. 11.8....11.9 ,12 .1, .12.5. ...13.0. 14.0....15.0., mc)

A 550 600 700 800 1000 1200 1400 1700 kc A ,., . 1.... 1.... 1..,. 1...c,...,ß

19-13 100 ' 105 110 115 120 125 130 1500 55 2002 5

15.1..15.2 15_3. 15.4. 15.6. 16.0 17.0 18.0 19 METERS 16 METERS 13 METERS

1111111T1111111111111111111111111111111111111111111111111111I1111111111111111111111111111 I1111111111111111111111111111111111111111111,111T111111I I I I 111111 111 1111111 f 1111111/11 27596

180 170 180 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0

19-13

Reduced Reproduction of Receiver Dial and Corresponding 0-180° Calibration Scales The corresponding position of the dial indicator for any setting of the calibration scale can be determined by drawing a line from this point on the bottom calibration scale to the same point on the top calibration scale. For example: 150° on the calibration scale corresponds to approximately 600 kc on "A" band, etc. Read instructions under "Alignment Procedure."

©John F. Rider


RCA PAGE 16-25

RCA MFG. CO. MODEL X60,Chassis RC474D

A G

4

w

01 II

03C. C6IL

A

0.4

e

125A-7 DOT TOM VIEW OF

l"DET-O5C. TUBE SOCKETS

lar 134.' TRANS 453 KC

pV !LI.' ORflf1 H

ANT COIL

A

.05

5600

Dl

RANEE SELECTOR

p0 Q4.54 # Cl

C KC

1700KC

0 ee ox COIL

o

2

RED EL'

125K7 I.F

05CILLO6RAPH CONNECTpNS VERTICAL '141TO THIS TERMINAL VERTICAL "0" TO GROUND TERM.

1220.0000.

INDICATES CHASSIS

Sw ITCH ON VOL CONTO

C

IZSQ7 2"' DET.-AF-AVC.

ZND I F TRANS 455 KC

0l

a

aim

OFEN LOIN roR FNNo

35L6GT OUTPUT

0035 1 a3

CTÿaNTEROL AA.

aWTCH /i, IIOV

220 j{

220.104

IOMEG

01

470610

CATNOOE CURREnTS ,L 12SA7

I 12557 _ _ . I13.O6A. 151 12501

- 15 NA.

141 57L66T 55.0 MA. 51 6N5 ._. 1 .4 MA. TOTAL-B-CURRENT.64.0 MA.

vOLTATtS lI10111D ,p MIT,R, il A C LYFti

Ñ KFT vvTNy v DML /yrM

'g W 0[NW2AONTri5TR LGD f tll.

150

PERMAKNT- IA.AENET DYNAMIC SPEAKER

.015 vg

STOCK DESCRIPTION STOCK O

K DESCRIPTION

ASSEMBLIES 14284 Resistor -22,000 ohms, 1/10 watt (RC -474D) 13998 Resistor -22,000 ohms, 4 watt

33719 Belt-Push button adjusting belts 12454 12412

Resistor -47,000 ohms, 4 watt Resistor -47,000 ohms, * watt

34024 Board-"Antenna-Ground" board 12264 Resistor -220,000 ohms, * watt 34025 Board-"Radio-Phono" board 12285 Resistor -470,000 ohms, 4 watt 33731 Button-Push button 30271 Resistor -4.7 megohm, 4 watt 30768 Cap-Rubber shield for Magic Eye 13601 Resistor -10 megohm, 4 watt 33629 Capacitor-Trimmer capacitor comprising of 2 33438 Screw-Magic Eye clip screw

sections (C7, C8) 33725 Shaft-Tuning knob drive shaft and retainer... 12723 Capacitor -56 mmfd., moulded mica 31365 Socket-Dial lamp socket 12720 Capacitor -100 mmfd., moulded mica 13871 Socket-Magic Eye socket 12725 Capacitor -150 mmfd., moulded mica 31319 Socket-Tube socket 12694 Capacitor -220 mmfd., moulded mica 31418 Spring-Tuning condenser drive cord spring... 13895 Capacitor -5,800 mmfd., moulded mica 33720 Spring-Push arm return spring 30303 Capacitor-.0035 mfd., 700 volts 33946 Switch-Range switch (S1) 33584 Capacitor-.005 mfd., 1,200 volts 34338 Switch-Tone control switch (S3)

4937 Capacitor-.01 mid., 500 volts 33722 Transformer-First i -f transformer (C1, C2)... 11315 Capacitor-.015 mfd., 400 volts 34028 Transformer-Second i -f transformer (C3, C4)..

4870 Capacitor-.025 mfd., 400 volts 33726 Washer-'C" washer for drive shaft 32787 Capacitor-.05 mfd., 400 volts

4839 Capacitor -0.1 mfd., 400 volts SPEAKER ASSEMBLIES 34505 34212

Capacitor -0.2 mfd., 300 volts Capacitor-Comprising 2 sections of 50 mid ,

(RL 85-2) each, 150 volts 32907 Cap-Cone center dust cap

30716 Clip-Magic Eye clip 34554 Cone-Speaker cone and voice coil 33732 Coil-Antenna coil 84803 Transformer-Output transformer 33733 Coil-Oscillator coil 33635 33631

Condenser-Tuning condenser and drum assembly Control-Volume control and power switch MISCELLANEOUS ASSEMBLIES

32634 Cord-Tuning condenser drive cord 31458 Cover -8 -protective covers for push button 33633 Indicator-Station selector pointer markers 11765 Lamp-Dial lamp --Mazda No. 61. 34270 Dial-Glass dial scale 33734 Plate-Dial plate complete less condenser and 33637 Escutcheon-Dial and button escutcheon

button 30863 Knob-Tuning, tone, range or volume control.. 30880 Resistor -150 ohms, 4 watt 33973 Marker -1 set push button markers 30152 Resistor -1,000 ohms, 1 watt 30900 Spring-Retaining spring for knob or button...

Short -Wave Sensitivity:

Where insufficient sensitivity is noted on the short-wave band of Model X-60, addition of capacity coupling of 3 or 4 mmfd. between signal and oscillator grids of converter tube will usually restore normal sensitivity to entire band. This coupling can be effected in several ways:

(a) Unsolder one grid lead, take several turns around other lead to give desired capacity, resolder.

(b) Twist several turns of insulated wire around both grid leads to give desired value of capacity coupling.

(c) Install a 8 to 4 mmfd. capacitor between tube grids.

©John F. Rider


26 RCA Ildr44414/ed del4e4yGdicii ir

MODEL X60

O

4

r N

Lt1

co

RCA MFG. CO.

z 0 z Q

U 7 ¡ 1/40e - = Z C

Q (%)ºf ̀V . )0 OQN -a 0

(n Z F- ln N cc

ZH -0 Q U)

m O 0

c0 vl

I .. / o ---- W / co í U Z

Q Q .0 cn

U

N Q t!1 N r.

O

03

Z / m

0 ó rv IL! i'

N 2 p U O = VZ w w O>O O z ̂' Z Wmru,

t0

N

wit t

m

4-

1

O

w \ Z/

Q

cc)

U a

©John F. Rider


RCA PAGE 16-27 4II EL 60

RCA MFG. CO.

Electrical and Mechanical Specifications FREQUENCY RANGES Standard Broadcast 540-1.720 kc Short Wave 5.6-20 mc Intermediate Frequency 455 kc Number of Push Buttons Six

TUBE COMPLEMENT (1) RCA-12SA7 First Detector -Oscillator (2) RCA-12SK7 I -F Amplifier (3) RCA12SQ7 Second Detector, A -F, and A.V.C. (4) RCA-35L6GT Power Output (5) RCA -6N5 Magic Eye (6) RCA35Z5GT Rectifier Dial Lamp Mazda No. 51, 7.5 volts; 0.20 amp.

POWER OUTPUT (126 volts, 60 cycle supply) I'ndistorted 0.8 watts Maximum 1.4 watts

POWER SUPPLY RATINGS A -C Rating D -C Rating

105-125 volts, 50.60 cycles, 35 watts 105.125 volts, direct current, 35 watts

Adjustments for Push -Button Tuning The push -buttons should be adjusted for six favorite stations after

the receiver has been operating for a brief warm-up period. Each button may be set up to any standard broadcast station. The preferable arrangement is to adjust for stations in the order of frequency, from low to high. Proceed as follows:

1. Pull off the push -buttons and loosen the push-button rods with a small screwdriver.

2. Check to be sure the link connection* on back of chassis is in "Radio" position (connected between terminals 2 and 3).

CO ISOO KC

Ce e00 Sc.

ANT. COIL

Ó I ST DE T. oec.

1ST 1.F (TRAMS

CS 20 MC.

CS, C4 493 SC.

250. 1.F TRANS

2 125K7

e 35Z5

GT

LF

3 12SQ7

RECT.

OUTPUT

4 358

250. DET AF- AVC.

A

PULLEY

G

SET POINTER YR LEFT OF THIS MARK.

PLATE

43S KC.

Tube and -Trimmer Locations

,7 1--600MC

INDICATOR \ DRIVE CORD

DIAL \ \\ INDICATOR

iaOM4 19 lIsoOK \

PULLEY

DRUM SHOWN WITH GANG AT MAXIMUM CAPACITY.

MH Re


co

DRUM

LOUDSPEAKER (RL 85-2) -Type 5 -inch permanent magnet dynamic V.C. impedance at 400 cycles s 4.5 ohms

Height Width Depth Cabinet Dimensions (inches) 91 16 T Chassis Base Dimensions (inches) 2.3/18 126 52 Overall Chassis Height ' 82 inches Shipping Weight 15 pounds Tuning Drive Ratio 10:1

3. Press in push-button No. 1 (left) as far as it will go without undue pressure, hold in, retune station with manual control if necessary for best reception, and then carefully tighten up the rod. Do not tighten more than 3 turn after the screw begins to grip or damage to the mechanism may result.

4. Replace the push-button on its shaft. 5. Proceed in a similar manner for the remainder of the push-

buttons. 8. Insert the station marker tabs in the recesses above the push-

buttons.

Alignment Procedure Cathode -Ray Alignment is the preferable method. Connections for

the oscillograph are shown in the schematic drawing. Output Meter Alignment.-If this method is used, connect the


Test-Oscillator.-For all alignment operations, connect the low aide of the test -oscillator to the receiver ground binding post, and keep the output as low as possible to avoid A.V.C. action.

Calibration Marks.-The tuning dial is fastened in the cabinet and can not be used for reference during alignment. Therefore calibration marks corresponding to dial readings of 600 kc, 1,500 kc, 8.1 mc, and 20 mc have been stamped in the plate on the front of the chassis as shown in the accompanying drawing. These marks are used for reference during alignment.

Dial Indicator Adjustment.-With the gang condenser in full mesh, the indicator should point 1/18 inch to the left of the mark at the extreme left (low frequency) end of the dial scale.

Steps Connect the high

side of theingust test osc. to-

Tune test osc. to- Turn radio

dial to- Adj the foll

for maximumow- peak output

1 Antenna terminal

455 kc "A" Band

Quiet Point between

550-750 kc

CS and C4 (2nd I -F trans.)

2 Cl and C2

(1st I -F trans.)

3 Antenna terminal


20 mc "C" Band

20 mc :ali- bration mark

C5 (osc.)

4 Antenna terminai

in series with 200 mmf.

1,600 kc "A" Band

1,500 kc calibration mark

C7 (osc.) CO (ost.)

6 800 kc "A" Band 800 kc cali-

bration mark CB osc.)

Rock gang

e Repeat step 4

* Use minimum peak if two can be obtained. Check to determine that C5 has been adjusted properly by tuning receiver to approximately 19.09 mc where a weaker signal should be received.

Note: Oscillator tracks above signal on both bands.

©John F. Rider


28 RCA 1:dODEL 54B5,Chassis RC1047

RCA MFG. CO.

MEA5URED WITH 1.5V. FIXED

No. 15 600 -455s% -C. 45585 KC. 455 KC. VI V2

IRS 1T4 CONVERTER IF.

LOOP

LI 20.

L3 -/ 000

Tr]. c 1- º757

C6

7.5-122.5

RI - 100K

'rt

-6V 600KGrjiI -7V 1500KC)

C4 56 -

BLUE. +60V L5 L6 GREEN

3E1g29 20n 2on

ln

44

7

BLUE t 60V

CH

4-

c 10l oz T Rz = I5K

IF PEAK 455 KC

85X 30X I5X 455 KC. 1

400 iv 400 w V3 V4 155 354

2ND. DET.. AF 4 AV.C. M OUTPUT I -7V i-

W

L7 Li GREEN !7 12

390.

R5 7.1.7. 013 68K 82

C14 .002

R6 R4 2 MEG. 10 VOL. MEG. CONTR.

REI 4.7 MEG

-C15 02

APPROX GAIN DATA USING CHANALYST

RIO 3.3 MEG.

1.5 V. FIXED - 81A5 FOR GAIN DATA

C7

105

R3

3,3 MEG.

33

K:1000 ALL VOLTAGES MEASURED WITH RESPECT TO

CHASSIS GROUND AND SHOULD HOLD WITHIN t20íó WITH RATED BATTERY SUPPLY.

*MEASURED WITH CHANALYST OR VOLTOHMYST

Alignment

Test Oscillator.-Connect test oscillator as indicated in chart keeping the output as low as possible to avoid A V C action.

Output Meter.-Connect a high resistance AC voltmeter in series with a .1 mfd capacitor from top lug of TB1 (plate of 354) to ground. Turn volume control to maximum position.

Fig. 1 shows the modifications necessary to convert a case into a convenient shield to be used as a substitute for the regular case in the Ant. Osc. alignment.

When using the dummy case for the osc. alignment, the loop assembly must be raised slightly so that osc. trimmer becomes accessible.

Steps

Connect the high side of

test osc. to-

Tune test-osc. to- Turn radio

dial to- Adjust the

following for max. peak output -

lug of C2, (located on

rear of gang) through a .01

mfd. capacitor

455 kc Quiet point near 1,600 kc

C1l, C12 2nd I -F trans.

2 455 kc Quiet point

near 1,600 kc C8 C9

1st I -F trans.

3 "Antenna

coupling loop thru 200

mmf. capacitor

1,600 kc 1,600 kc CS (osc,)

4 1,500 kc 1,500 kc C2 (ant.)

5 600 kc 600 kc L2 (osc.) (Rock gang)

6 Repeat steps 4 and 5 for final adjustments.

*The IF transformers can be aligned with chassis out of case. "Steps 3, 4 and 5 require a coupling loop from the signal generator to feed a signal into the receiver loop located in the back. This loop should be approximately one turn of 6 x 3I. inches coupled to the signal generator through a 200 mmf. capacitor, and loosely coupled to the receiver loop antenna at about 154 inches distance, so as not to disturb the receiver loop inductance. Ground test oscillator through .1 mf. capacitor to receiver chassis.

CRITICAL LEAD DRESS

1. Dress blue, green and black leads of second IF transformer as direct as possible. If excess lead exists, dress down side of socket and flat against chassis to transformer opening.

2. Cross the green and the black leads inside the first IF transformer can, keeping the green lead to the outside. Load coil bracket is to separate the blue and the green leads.

+ IIIIIIII- 67 1/2_V.

..Ij BATT.

Procedure

R9

820

P-925211-2

c20 008

T1

3301!.

51 +I

11/2!:

!4 BATT

3. Dress audio coupling capacitor C14 and the lead to the volume control up and underneath shelf supporting the output transformer.

4. Wire in the three capacitors pyramided behind the speaker with enough space behind the battery holder to allow holder to move when battery is replaced. Dress the ground leads of these capacitors to keep from shorting the off -on switch.

5. Observe the outside foil connections oti'all paper capacitors, also the polarity of the electrolytic capacitor C17.

6. Keep blue and red leads of output transformer above the mounting shelf.

7. Dress all leads as far as possible from loading coil. 8. Dress leads to gang as far as possible from all metal parts. 9. Dress loop leads to keep from interfering with battery replacement.

C5 -05C. C2 -ANT. 1600 KC. 1500 KC.

Fig. 4

TV14

1ST. I.F TRANS. C8 -C9 455 KC.

NOTE: A rubber hand should be placed around each tube for cushioning. Dirty tube contacts may be mistaken for a defective tube.

©John F. Rider


RCA PAGE 16 29

MODEL 54B5 RCA MFG. CO.

Replacement of Component Parts

I. To remove tubes: a. Slide back cover towards handle. b. Remove both batteries. c. Pry tubes out of sockets by gently wedging small screwdriver

between base of tubes and sockets.

II. To replace batteries: a. Slide back cover towards handle. b. Remove, either or both, the "A" and "B" battery as the case

may warrant. The "B" battery snap fasteners can best be removed by inserting a screwdriver under the snap fastener strip and prying upward.

III. To remove loop: a. Remove "A" and "B" batteries (see item I:). b. Unsolder loop leads from terminals on battery holder. c. Remove four mounting screws "B" in the four corners as indi-

cated in fig. 2 and lift off.

IV. To remove chassis: a. Remove loop. b. Remove the two screws "H" holding the switch bracket. c. Remove the two chassis mounting screws "A", fig. 2.

V. To remove speaker a. Remove volume control knob by loosening set screw and pull. b. Unsolder voice coil leads, and remove the two mounting screws C" fig. 2.

c. Slide speaker out.

VI. To remove output transformer: a. Remove speaker and keep it clear of metal particles. b. Drill out mounting rivet, and bend tabs (when replacing use

small screw). c. Unsolder leads and lift out.

VII. To remove chassis mounting plate: a. Unsolder copper strip under 3S4 tube. b. Remove two screws (F) holding tube shelf to front plate. These

screws are located between tubes IRS and 1T4, also 3S4 and 1S5. Rubber shock mounts may stick on studs, pry loose.

c. Remove nut (G) beneath tube shelf below second I -F transformer. d. Remove screw (G) beneath the negative terminal of "A" battery

holder, and also screw (G) adjacent to volume control below "A" battery holder.

e. Carefully invert the chassis. f. Remove volume control wheel (loosen set screw and pull off). g.' Lift the mounting plate off.

VIII. To remove volume control: a. Remove "A" battery holder. b. Unsolder volume control leads. c. Remove chassis mounting plate (see item VII). d. Remove volume assembly by bending tabs and lifting out.

II. To remove oscillator coil: a. Remove battery holder. b. Remove chassis mounting plate. c. Unsolder oscillator coil leads. d. Remove coil by unsnapping spring mounting clips from angle

bracket.

X. To remove 1st I -F transformer: a. Remove speaker. b. Unsolder four leads from 1st I -F transformer.

1. Blue to plate of IRS tube. 2. Green to grid of 1T4 tube. 3. Red to B + terminal of 5 lug terminal board adjacent to out-

put transformer. 4. Black to AVC terminal of same strip as above.

c. Remove connections as required from two lug terminal board adjacent to 1st I -F transformer to permit this terminal board to be moved to a position free of the let I -F transformer.

d. Unsolder and bend mounting tabs straight on the I -F transformer can. These tabs are immediately below the 2nd I -F transformer on tube shelf.

e. Slip 1st I -F transformer forward toward volume control and out. Note: It is possible to fold the 1st I -F transformer out the

front of the chassis if the front plate is removed. This will eliminate the unsoldering of leads from the two lug terminal board.

XI. To remove 2nd I -F transformer: a. Carefully remove the two 0.02 of C10, C15 capacitors. b. Carefully depress the two leads (B+ and A +) near the I -F

transformer case mounting lugs and unsolder these tabs from the tube mounting shelf and bend out.

c. Unsolder the blue (plate pf IT4), green (grid of 1S5), red (B+ on terminal board), and black leads.

d. Remove 2nd I -F transformer.

III. To remove tuning condenser: a. Remove chassis mounting plate (see item VII). b. Unsolder leads to tuning gang. c. Loosen loading coil if necessary. d. Remove two mounting screws and lift out.

Tools required: 1. One Phillips No. 1 screwdriver. 2. One small insulated alignment tool. 3. Allen wrench for a #6 set screw. (Use to remove volume control

wheel.)

"E" C.. "B

óROUNOING TUBE TO REMOVE TO REMOVE STRIPS SHELF SUB- SPEAKER LOOP ASSEMBLY

ASSEMBLY FROM CHASSIS.

2NQ I.F. TRANS. GIO

f-- GANG COND.

TO REMOVE TUBE SHELF SUB ASSEMBLY.

CONNECT TEST OSCILLATOR HERE FOR 1.F ALIGNMENT.

TO REMOVE "A BATTERY BRACKET. SW. SCREWS H

"A" To REMOVe. CRASSI S

\ TO RE MOVE CHASSIS SUB ASSEMBLY

B»I 'A' BATTERY Gj BRACKET

TV 33A

LOOP ANTENNA

C IS

2 ND. I.F TRANS

BV 5

TUBE SHELF SUBASSEMBLY R5 -12G -C16 (BOTTOM VIEW)

ISS 3S4

-I v

+A CIA tB -B TI

TO Ted

©John F. Rider


30 RCA MODEL 54B5

"A"-1.5 volt RCA -VS 036 or VS 001 "B"-67.5 volts RCA -VS 016

RCA MFG. CO.

Specifications Frequency Range 550-1,600 kc


Power Supply Current Approximate Life

Type Battery Consumption (Intermittent Duty)

0.25 amperes 5-6 hours

8.5 milliamperes 25-40 hours

Power Output Undistorted 0.05 watts Maximum 0.12 watts

Loudspeaker Type Permanent -Magnet Dynamic Elliptical 2 x 3 in.

Voice Coil Impedance 11% ohms at 1000 cycles

Replacement Parts

hF--3 t`l2 1 2$

i Nis 270 I/4A o+N

SDtLOT. T

r 1/4 Dt4.

HOLE

Fig. I

ALIGNMENT SHIELD



CHASSIS ASSEMBLIES *72230 Support-Tube support less tube socket and transformer RC 1047 *72231 Switch-Power switch (Sl)

70440 Transformer-Output transformer (TI) 70423 Band-Rubber band for tubes 70442 Transformer-First I. F. transformer (L5 L6, C8, C9) 70444 Board-Speaker terminal board (5 contact) 70437 Transformer-Second I. F. transformer (L7, L8, C11, C12) 70445 Board-Terminal board (1 contact) 33111 Capacitor-Ceramic, 33 mmf. (C16) SPEAKER ASSEMBLY 71924 Capacitor-Ceramic, 56 mmf. (C4) 92523-3W 71514 Capacitor-Ceramic, 82 mmf. (C13) RL95-4 72315 Capacitor-Tubular, .002 mfd., 150 volts (C14, C19) 70627 Capacitor-Tubular, .005 mfd., 600 volts (C20) 70428 Speaker -2 x 3" P.M. speaker complete with cone and voice 70453 Capacitor-Tubular, .02 mfd., 100 volts (C10, C15) coil 71013 Capacitor-Tubular, .05 mfd., 400 volts (C7) NOTE: If stamping on speaker in instrument does not agree 36718 Capacitor-Electrolytic, 10 mfd., 60 volts (Cl7) with above speaker number, order replacement parts

*72215 Coil-Loading coil (L3) by referring to model number of instrument, number 70443 Coil-Oscillator coil (L2, L4) stamped on speaker and full description of part

*72227 Condenser-Variable tuning condenser (CI, C2, C5, C6) required. *72228 Control-Volume control (R6) 70429 Grommet-Rubber grommet to mount tube support assembly MISCELLANEOUS

(2 required) *72233 Back-Case back *72229 Holder-Battery holder *72238 Case-"Jewel Box" case less front cover and divider strip *72225 Insulator-Insulator for chassis panel *72241 Cover-Front cover only less screen *72226 Knob-Volufne control knob *72243 Frame-Loop frame only less loop winding *72224 Panel-Front panel *72235 Handle-Carrying handle

14076 Resistor -820 ohms, watt (R9) *72232 Knob-Tuning knob 36714 Resistor -15,000 ohms, j watt (R2) *72234 Link-Link for carrying handle (2 required) 14138 Resistor -68,000 ohms, )/ watt (R5) *72244 Loop-Loop winding only (Ll) 3252 Resistor -100,000 ohms, watt (Rl) *72237 Mounting One set of hardware to mount chassis

30652 Resistor -1 megohm, % watt (R7) *72242 Screen-Front cover screen only 31417 Resistor -3.3 megohms, y watt (R3, R10) *72240 Screw-Drive screws for Divider strip and front panel (total 30931 Resistor -4.7 megohms, '/a watt (R8) of 4 required) 30992 Resistor -10 megohms, y watt (R4) *72236 Screw-Flat head screw for mounting loop (4 required) 70527 Screw-#6-32 z 84" set screw for volume control knob 70425 Spring-Tuning knob spring clip 70436 Socket-Tube socket *72239 Strip-Divider strip

*This is the first time this Stock No. has appeared in Service Data.

©John F. Rider


RCA PAGE 16-31

a PRI. LI

0.16.

20 X GOO KC .

BOTTOM VIEW OF TUBE SOCKETS

CI 11 I C2 2-17 7-"Z 14-466

RI 22K

r40X O.Bx 100x TV,BX GOO -455KC. 1 455 KC. I 455 KC. II 459 KC.

2 t25A7 125K7

1ST. DET. & OSC. CO24

©+

CIS .O1 I

1

SEC. L2 1a

04:..! v

3 -7...

L7 I

L4 © II - °C7 o 75-160

qq qrQ' 1

L3 w mC3riZC4 RED _ 44nw j 2-17

T7-133 ©IQ o -

* -6.9 V. (550KC) -t0,5V. (ISOOKC -

Rt6 220 K

IST. IF. TRANS. 455 KC. CO

-lam S GRN

á (JO

INDICATE S COMMON WIRING INSULATED FROM CHASSIS.

INDICATES CHASSIS GROUND

K a 1600

OSC. COIL

UNDER CHASSIS VIEW

1946..R4

C12 - 3V. FIXED 1.05 BIAS FOR - GAIN DATA

RCA MFG. CO.

MEASURED WITH 3V. FIXED BIAS

I F

/31V.

2ND. IF TR. 455 KL. a

MODELS 61-8,61-9, Chassis RC1034

IF PEAK 455 KC

4óóN I 4o9oXn,

3 4 12Sß7

2ND. DST. A.F. AND AVC

R9 120

5OLGGT OUTPUT C:17

r ---- ------ -- - I

CB II

u3.) óL9 C9 N I B

75-160T m p,ñ 75-160 C13 I 33oC23T 470RK

I via 120 I 1 RED L_- P

II if ªa" - CII 120 m

7477

220K

\.m. R4

3.3 ME6. R5 500 K

STOP AT 50 K

C14 .02

- II

VOL. CONTR.

RG 4.7 MEG.

.02

APPROX. GAIN DATA USING CHANALV5T

9n:

3 1 2 4 12507 12SA7 123X7 501667

VOLTAGES MEASURED WITH RESPECT TO COMMON -B, AND SHOULD HOLD WITHIN ±20V WITH 117 V. AC. SUPPLY.

* MEASURED WITH CHANALYST OR VOLTOHMV ST.

5 3525 GT RECTIFIER

P-92'3104-4

Alignment Procedure Output Meter Alignment.-If this method is used, connect the meter

across the voice coil, and turn receiver the 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 oscillator output as low as possible to avoid a -v -c action.

Calibration Scale.-The glass tuning dial may be removed from the cabinet and mounted above the pointer for reference during alignment. The extreme left hand mark of the Standard Broadcast scale must be in line with the left hand mark on the dial backing plate.

Dial Backing Plate.-In the event that only the chassis is returned for service, the marks on the dial backing plate may be used during alignment; refer to the Dial Indicator and Drive Mechanism drawing for corresponding frequencies.

Dial Pointer.-With the gang condenser in full mesh the dial pointer should be set to the left hand reference mark on the dial backing plate.

For additional information refer to booklet, "RCA Victor Receiver Alignment."

` sáótisoo 1

1000 1300

SHOWN WITH GANG CONDENSER AT MAX. CAPAC IT y.


O

112V.

(1, 1 SI S1

ON' VOL. CONTR.

117V. SO-6Oti OR DC 25 W.

V.C. e2.Bñ

O

R15 1200

r + + -1 C20 I-I hI C19

50 MF I 30 MF i

L . --J CATHODE CURRENTS

125 A7_ _ - 8.5M> 12S K7 - - 12.1 ME. 12557 - - .12 MA SOLe GT - - 33.o MA, 35256T/G - 54.1 MA.

Steps


test -oscillator to- Tune

test -ose. to- Turn

radio dial to-

Adjust the fol - lowing for max. peak

output

12SK7 I -F grid C8 and C9 1 through 0.1 mfd. 2nd I -F

capacitor Quiet -point transformer 455 kc 1,600 kc

Stator of 5C6 and C7 end of dial 2 C2 through

0.1 mfd. 1st I -F

transformer

3 C3 (osc.) Ant. lead

in series with 1,300 kc 1,300 kc Cl (ant.)

200 mmfd. 600 600 kc LS (osc.)

"A" Band Rock gang


*Do not readjust C8 or C9 when test oscillator is connected to C2.

L3-14.15 OSE'.

Soo cc.

CI - R.F. 1300XC.

C3- osc.

Tube and Trimmer Locations

©John F. Rider


32 RCA MODELS 61-8,61-9

RCA MFG. CO.

61-8 (Brown Plastic)

61-9 (Ivory Plastic)

Specifications Frequency Range


Power Output Undistorted Maximum

540-1600 kc

455 kc

1 0 watt t 5 watts

POWER SUPPLY POLARITY.-For operation on DC. the power plug must be inserted in the outlet for correct polarity. If the set does not function, reverse the plug. On AC, reversal of the plug may reduce hum.

Critical Lead Dress

Tube Complement (1) RCA Radiotron 12SA7 Converter

1. Dress blue and green leads of both I -F transformers back in shield cans, leaving them as short as possible.

(2) RCA Radiotron 12SK7 I -F Amplifier 2. Dress all heater leads next to chassis. (3) RCA Radiotron I2SQ7 2nd Det., A.V.C., and A -F Amplifier (4) RCA Radiotron SOL6GT Power Output 3. Dress power cord toward output transformer away from volume control (5) RCA Radiotron 35Z5GT Rectifier and audio circuits. Pilot Lamp Mazda No. 51, 6-8 volts, 0.2 amp. 4. Dress capacitor (C14) toward switch and parallel to chassis length. Loudspeaker (922258-1) 5. Dress capacitor (C16) back against rear chassis apron. Type 4' x 6" PM 6. Dress capacitor (C17) over and towards 50L6 socket perpendicular to V. C. Impedance 3 4 ohms at 400 cycles

capacitor (C14) and (C16). Cabinet Dimensions Height Width Depth 7. Dress pilot lamp leads over second 1-F transformer and away from tubes. Cabinet (Outside)7' Shipping Weight9 11+/4" 7t¡"

lbs. 8. Dress blue lead from output transformer against front apron and away P Tuning Drive Ratio ' 20:1 from I -F leads.

Power Supply Rating 9. Dress contact on oscillator section of gang condenser back away from 105-125 volts, AC, 50 or 60 cycles, or DC 30 watts oscillator coil (L3, 4, 5) adjustment.

Replacement Parts



CHASSIS ASSEMBLIES 34449 Socket-Lamp socket RC 1034 37605 Socket-Tube socket-moulded

70390 Spring-Drive cord tension spring 70389 Bearing-Tuning knob shaft bearing 70465 Transformer-First I.F. transformer (L6, L7, C6, C7) 39640 Capacitor-Mica, 330 mmf. (C23) 70466 Transformer-Second I.F. transformer (L8, L9, C8, C9, CI1, 70606 Capacitor-Tubular, .005 mfd., 400 volts (C16) C13) 70610 Capacitor-Tubular, .01 mid., 200 volts (Cl5) 70385 Transformer-Output transformer (TI)

Washer-"C" 70611 Capacitor-Tubular, .02 mfd., 400 volts (C14, C17) 33726 washer for tuning knob shaft 70615 Capacitor-Tubulaf, .05 mfd., 400 volts (C12, C18) 70617 Capacitor-Tubular, 0.1 mid., 400 volts (C24) 70408 Capacitor-Electrolytic comprising l section of SO mfd., ISO

volts and 1 section of 30 mid., 150 volts (C19, C20) SPEAKER ASSEMBLY

922258-1 70477 Coil-Oscillator coil (L3, L4, LS) 70463 Condenser-Variable tuning condenser complete with drum 70470 Speaker -4" z 6" P.M. elliptical speaker complete

(Cl, C2 C3, C4) NOTE: If stamping on speaker in instrument does not agree 70322 Control-Volume control and power switch (RS, SI) with above speaker number, order replacement parts 32634 Cord-Drive cord (approximately 38") by referring to model number of instrument, number 70464 Drum-Drive drum stamped on speaker and full description of part 70469 Indicator-Station selector indicator required. 11765 Lamp-Dial lamp-Mazda 51 70468 Loop-Antenna loop (LI, L2) MISCELLANEOUS 70462 Plate-Dial back plate complete with drive cord pulleys less

dial *71794 Back-Cabinet back for Radiola 61-8 36230 Pulley-Drive cord pulley *71795 Back-Cabinet back for Radiola 61-9 30189 Resistor-l20 ohms, % watt (R9) Y1365 Cabinet-Brown plastic cabinet for Radiola 61-8

6134 Resistor -1200 ohms, 1 watt (R1S) Y1366 Cabinet-Ivory plastic cabinet for Radiola 61-9 30492 Resistor -22,000 ohms, ì; watt (RI) 70475 Clamp-Dial clamp (1 set) 14583 Resistor -220,000 ohms, Y4 watt (R7, Rl6) *71796 Dial-Glass dial scale 30648 Resistor -470,000 ohms, % watt (Re) 37831 Fastener-Push fastener (l set) for cabinet back 31417 Resistor -3.3 megohms, % watt (R4) 70474 Knob-Control knob-ivory-for Radiola 61-9 30931 Resistor -4.7 megohms, 4 watt (R6) 70473 Knob-Control knob-mottled walnut-for Radiola 61-8 70467 Shaft-Tuning knob shaft 30900 Spring-Retaining spring for knob

*THIS IS THE FIRST TIME THIS STOCK NUMBER HAS APPEARED IN PRINT.

©John F. Rider


RCA PAGE L6-34

u

I6 X 600 KC

PRI

L2

0

LI tan

56 X 600- 455KC

lcn íu6 %2-17 7-12-444

005 MF.

C3 1

1MF.

CHASSIS GROVND

C2 D5 MF.

RI 220K

INDICATES COMMON

e WIRINi

OSC COIL TERMINAL DETAIL

POWER SUPPLY

111,1

5 2

12527 12567

125A7 CONVERTER

R2

22K e S40KC

-B.7V. 1E,00KC -9.90.

3

BBV

0.8x { 45 sKC I

45!5KC

O II/ 1 r TRANS.

BBV.

RCA MFG. CO. MODEL 62-1, Chassis RC1017A, RC -1017B

10 OX 455KC

125K7 I.F. AMPLIFIER

COI 110

ssV

O

U L4-C LIS 1 C24

B.5f7--913412 IB

7H -B-134 L1-17 T 5.6 o + +

O

0.9x S K 4 5C

55X 400 T.

7X 400 'l

12SQ7 50L6 -GT 29. DET.-AVG-AUDIO OUTPUT

*44V 455KC

239 I F. TRANS.

Ls L9 IDA 13A

C6 1201

C7 Ijl

J

f

- "1- 3 V. BUS FOR ¡- GAIN DATA tE/

P1CKU1

MOTOR

PHONO

RO Ht

3.3 MEG

R1O-VOL. CONTROL 0.5 MEG.

STOP AT SO IC

CS .002

MF

IO

9

12

8

SI 7

FRONT

I C15 i820

R6 5.5 MEG

CB

II- MF.

R7 ISO

RB 470K

5.9V

©©T

O 0880 PRI

20011 005

rrfrr

APPRO1. GAIN DATA

115101.0 CHANALVST

CIO -.025

MF

CII

RS 220K

C9 -.002 MF

9

R

3

4

R9

200

C25 I+ 30 MF .'12

4

5

AR

12SK7 SOLE,

120V.

effilCI' C14 © .05 T O MF T

35Z 5 -GT RECTIFIER

1946..R1 IF PEAK 455 KC

OoDIAL LAMP MA2D4*5L

Replacement Parts-Radio Only

192073A

RII

3311 C24 0+

VOLTA ES SHOULD HOLD WITHINO20% WITH 111V.

RATED SUPPLY VOLTAGE

*MEA uRED WITH CHANALVST DR vOLTOHMYST

ALL VOLTAGES ARE MEASURED WITH RESPECT TO COMMON -B

K=1000

SWITCH SHOWN IN EXTREME CLOCKWISE (Off) POSITION AND VIEWED FROM FRONT Of CHASSIS.

SWITCH POSITIONS 1 OFF

2 RADIO Low 3 RADIO HIGH 4 PHONO LOW 5 PHOno HIGH

BO MF,



CHASSIS ASSEMBLIES 70388 Shaft-Tuning knob shaft RC 1017A 34449 Socket-Lamp socket RC 10173 35787 Socket-Phono input socket

70389 Bearing-Tuning knob shaft bearing q q 27605 70390

Socket-Tube socket-moulded Spring-Drive cord tension spring 70407 Button-Plug button (2 required) 70396 Spring-Volume control gear tension spring 70997 Capacitor-Mica, 5.6 mmf. (C24) 70394 Switch-Power or radio phono switch 39650 Capacitor-Mica, 820 mm1. (C15) 70386 Transformer-First I.F. transformer 70601 Capacitor-Tubular, .002 mid., 400 volts (C5, C9) 70387 Transformer-Second I.F. transformer 70606 Capacitor-Tubular, .005 mid., 400 volts (C1, C11) 70385 Transformer-Output transformer 70611 Capacitor-Tubular, .02 mid., 400 volts (C8) 33726 Washer-"C" washer for tuning knob shaft 70612 Capacitor-Tubular, .025 mfd., 400 volts (Cl0) 70406 Washer-Spring washer for volume control 70615

70617 Capacitor-Tubular .05 mid., 400 volts (C2, C14) SPEAKER ASSEMBLY

'72312 Capacitor-Tubular, 0.1 mid., 400 volts (C3, C4) 922279-1

70403

Capacitor-Electrolytic, comprising 1 section of 30 mid.. 150 volts and 1 section of 80 mid., 150 volts (C25, C26) 70405

70470 Speaker -4" x 6" P.M. speaker complete Speaker -4" x 6" elliptical P.M. speaker complete

70383 Coil-Oscillator coil Condenser-Variable tuning condenser complete with

drum with cone and voice coil ) SPEAKER ASSEMBLY

72756 Control-Volume control 922258-2 32634 Cord-Drive cord (approx. 48" overall length) 71058 Speaker -4' x 6" P.M. elliptical speaker complete with 70392 Cord-Power cord cone and voice coil 70384 Drum-Drive drum NOTE: If stamping on speaker in instrument does not 70397 Gear-Power or radio -phono switch gear agree with above speaker number, order re - 70395 Gear-Volume control gear and spring assembly placement parts by referring to model number 70404 Indicator-Station selector indicator of instrument, number stamped on speaker and 70391 Insulator-Bakelite insulator for phono input socket full description of part required. 11765

'72311 Lamp-Dial lamp MISCELLANEOUS Loop-Antenna loop 70398 Clamp-Dial clamps (1 set) 70382 Plate-Dial back plate complete with pulleys less dial 70709 Dial-Glass dial 30868

36230 '72313

Plug -2 contact female plug for "AC" cable Pulley --Drive cord pulley Resistor -33 1

71595 7070770401

Feet-Rubber feet (4 required) hinge (2 required)

30880 ohms, watt (R11)

Resistor -150 ohms, 1/4 Knob-PowerHLid Brooch and radio -phono switch knob

6134 watt (R7)

Resistor -1200 70400 Knob-Tuning knob 30492 14583

ohms, 1 watt (R9) Resistor -22,000 ohms, 1/4 watt (R2)70399 Resistor -220.000 1

71815 Knob-Volume control knob Mounting-One Mspns,two set of hardware consistingobb of four

30648 ohms,

Resistor -470,000 ohms, 4 watt (Rl) R5)

1/4 watt (R8) springs, spring washers and two rubber washers to mount record changer 12928 Resistor -3.3 megohms, 1/4 watt (R4) 14270 Spring-Retaining spring for knobs 31455 Resistor -5.6 megohms, 2/4 watt (R6) 71824 Stud-Stud and screw to mount lid hinge (1 set) 14974 Screw-#8-32 x 3/16" long set screw for lower gear 39545 Support-Lid support

' THIS IS THE FIRST TIME THIS STOCK NUMBER HAS APPEARED IN PRINT.

©John F. Rider RECORD CHANGER: RCA 960260-2, RCD.CH.P.15-17


34 RCA MODEL 62-1

RCA MFG. CO.


Five -Tube, Single -Band, Superheterodyne Receiver

Frequency Range 540-1,600 kc


Power Output Undistorted 1.5 watts Maximum 2.4 watts

Loudspeaker (922279-1) "PM" or 9222582 Size 4 x 6 inch. elliptical V.C. Impedance 3.4 ohms at 400 cycles

Power Supply Rating 105-125 volts. AC, 60 cycles 60 watts IMPORTANT Do not plug instrument into a d -c supply.

Height Width Depth Cabinet dimensions (inches) 101'r 171/4 171/4

Chassis overall (inches) 65/e 14 6/ Chassis base (inches) 1% 14 33/4

Tuning Drive Ratio 14:1

Phonograph Type Automatic (960260-2)

Record Capacity Twelve 10 -in., Ten I2 -in. Turntable Speed 78 r.p.m. Type Pickup Crystal Motor Power Consumption 25 watts

Alignment Procedure CAUTION.-CLOSE TUNING CONDENSER PLATES COMPLETELY (C -C -W) BEFORE REMOVING CHASSIS FROM CABINET. Take off both wooden strips on bottom of cabinet by removing wood screws before loosening chassis bolts.

CRITICAL- LEAD DRESS. - 1. All filament wires should be dressed close to chassis. 2. Dress lead from switch to phono jack close to chassis and

away from power cord. 3. Dress capacitor between 12SQ7 grid and terminal board away

from chassis and away from other parts. 4. Dress all exposed leads away from each other and away from

chassis to prevent short circuits. 5. In instrument assembly the lead from the rear section of

gang to loop shall be dressed away from chassis and other wires to loop.

VOLUMECONTROL

Dial Pointer Adjustment.-Rotate tuning oondenser fully counterclockwise (plates fully meshed). Adjust indicator pointer to left (max. cap.) mark on dial back plate.

nuwix-n.oo-wao-Tar

.(.0.040t.

n..n i V.Una1::7241, ^sr

Control Positions

TUN r

Test Oscillator.-Connect high side of test oscillator as shown in chart. Connect low side through a .01 mi capacitor to common "-B." Keep the output signal as low as possible to avoid a.v.c. action.

Output Meter. --Connect meter across speaker voice coil. Turn volume control clockwise to radio maximum high position (3) for alignment.

Steps Connect the high side of test -oscillator

to- Tune

test -ose. to-

Turn radio dial

to-

Adjust the following for max. peak

output

1

I.F. grid, in series with

.01 mid. 455 kc

Quiet point 1600 kc

end of dial

L8 and L9 2nd I.F.

transformer

2 1st Det. grid

in series with .01 mfd.

L6 and L7 1st I.F.

transformer

NOTE.-ANTENNA LOOP AND RECORD CHANGER MUST BE IN CABINET

3 Antenna fermi- aal in series

with 220 tumid. 1600 kc Gan at g

minimum C19 (osc.)

4 Radiated signal 1300 kc Signal frequency C17 (ant.)


Do not readjust L8 or L9 when test oscillator is connected to 1st Det.

T V eA

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:

Reversal of plug in outlet receptacle may reduce hum.

©John F. Rider


RCA PAGE 16-35

u

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RCA MFG. CO. i

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MODELS 67V1,67AV1,

Chassis RC6C6

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©John F. Rider RECORD CHANGER: RCA 960260-1, RCD.CH.P.15-17


36 RCA dchematice.

MODELS 67V1,67AV1

LINK CLOSED;

FOR

LOOP R.

OPERATION

51 FRONT

L1

RCA MFG. CO.

51 REAR C5

I¡ß_1 4 I C32 1 I \

BAND -SWITCH SHOWN AT 2"D POSITION CLOCKWISE .

BROADCAST BAND 540 - 1600 KC.

8 51

FRONT

Rt. C4

AVC

S2 5

REAR

GANGED C3

C22 /T

51 REAR C5

12- - L3 Ceo C1 -

BAND -SWITCH SHOWN AT 3RD POSITION CLOCKWISE .

SHORT WAVE BAND 9.2 - 16 MC.

R1 C4

AVC

52 REAR

11 12

52 REAR

C9 C24'

14

6SA7 1sT DET. OSC.

C 2 5

C6 R2

+275V

6

NOTE:

1ST POSITION (PHONO)

NOT SHOWN.

GSA? 1ST DET. OSC.

5I S2 REAR

Y

+275V

C23 L5 GANGED L2

\ \ , C22

$275V

+275V

T2

i}(' ,1}i

T2

©John F. Rider


RCA PAGE 16-37

CewP SFNq. LEADS

O 0.ED F LOOP LEADS

MOTORI' ^ ( PHONO( LEADS lJ ITTITI

JACK O DLK^

Le- L9 sm.4 TAP

L4 A,OSC 600ncQ

L5 -C OSC -'+Q

C 21 ANT.

TOP VIEW

RCA MFG. CO.

L6- L7 TOP 4 ORT

C23 C O5C

V

iSA7

Steps Connect high side of test

oscillator to- Tune test oscillator to-

Turn radio dial to-

Adlust the following for

maximum peak output

1

6507 grid in series with

.01 mfd.Trans.) 455 kc.

Broadcast Quiet Point at 550 kc.

end of dial

LB, L9 (2nd I -F

2 BSA7 grid in series with

.01 mfd.

LB. 1.7 (1st I -F Trans.)

3

Yellow lead on loop in series

with 200 mmfd. (link closed)

1,400 kc. Broadcast 1400 ke.

C24 (ose.)

4 600 kc. Broadcast 600 ke.

L4 (osc.) Rock gang


6

Antenna terminal in series with 47 mmfd.

15.2 mc. Short Wave 15.2 mc.

C23 (osc.) C20 (ant.)

7 9.5 mc. Short Wave 9.5 me.

L5 (one.) L3 (ant.)


9 Install and connect chassis in cabinet with link closed. Tune in a radiated signal of 1400 ke. on broadcast band and peak C32 on loop.

Use minimum capacity peak if two can be obtained. Check for selection of correct peak by tuning the receiver to approximately 14.3 mc., where a weaker signal should be received.

Oscillator tracks 455 kc. above signal on both banda.

e eE 2rPCAL. MAR AS SHOVJN

DAL TER ADJUSTMENT

MAN WITH GANG CONA

AT MAN CAPACITY (FULLY CLOSES)

MODELS 67V1,67AV1

Alignment Procedure Output Meter Alignment.-If this method is used, connect the


Test Oscillator.--Fpr all alignment operations, connect the low side of the test -oscillator to the receiver chassis, and keep the oscillator output as low as possible to avoid a -v -c action

Calibration Scale.-The dial scale printed in thisservice note may be temporarily attached to the chassis for quick reference during alignment.

Using Printed Dial Scale. - 1. Cut out the printed dial scale, or, better still, make a tracing

of the scale. 2. With gang at full mesh the pointer should be set to the sec-

ond reference mark from the left hand end of the dial backing plate.

3. Place the printed dial scale or the tracing under the pointer so that the extreme left scale graduations coincide with the pointer. Use scotch tape to hold the dial scale in place.

Not..-It is not recommended that the glass dial scale in the cabinet be removed as an alignment reference. This glass dial scale is fastened to the bezel with sheet metal lugs bent over the scale to hold it in place. Removing the glass dial scale will necessitate bending the lugs, resulting in their weakening and subsequent breakage.

"C" Band Reception.-For best reception on "C" band with an outside antenna, adjust the trimmer screw of C20 on the antenna coil. Turn screw carefully with an insulated screwdriver (RCA Stock No. 31031) while the receiver is tuned to a station in the 31 -meter band. If returning to internal antenna at any time, close the link on the center terminal and readjust "C" band antenna trimmer C20 for best receptibn on 31 -meter band.

PLUG (FROM(,

VIEW)

SOCKET (FIENT VIEW)

OUTPUT SCREENS RECT. RILAMENT

SPEAKER CONNECTIONS

TERMINAL SCREW ON RAIL BOTTOM OF CABINET á

I

EXTERNAL ANTENNA CONNECTIONS

FIG 3

WHEN USING EXTERNAL ANTENNA, OPEN LINK DIAL INDICATOR AND DRIVE MECHANISM AND CONNECT LEAD-IN TO TERMINAL SCREW.

©John F. Rider


38 RCA MODELS 67V1,67AV1

RCA MFG. CO.

Critical Lead Dress:

1. Dress speaker cable leads down next to chassis. 2. Dress output plate capacitors next to chassis. 3. Dress plate lead of output tube away from grid of audio

amplifier. 4. Dress all a -c leads away from volume control down next to

chassis. 5. Dress R16 away from a -c leads at on -off switch. 6. Dress R2 away from side of chassis.

Note.-In order to remove the chassis from the cabinet, remove the knobs and the connecting cables, then unscrew the four slotted hex head screws from the two "L" brackets bolted to the rear of the chassis. The chassis may then be slid out toward the bottom rear of the cabinet. Do not remove the hinge screws or the two large nuts in the rear of the chassis. When replacing the chassis, make sure that the tapered pins on the front of the chassis fit into the holes on the metal runners screwed to the cabinet door.

Specifications

Circuit Description The receiver is a seven tube superheterodyne employing push-pull power output. AVC is applied to the converter and i -t tubes. The broadcast band utilizes a standard loop antenna, and the short wave antenna is a wire tacked in the cabinet.

Dimensions Chassis

Cabinet (overall) Height (inches) 34 55/e Width (inches) 31 111/e Power Output Rating Depth (inches) 161/4 6 Undistorted 5 watts Tuning Drive Ratio 14:1 Maximum 6.5 watts

Power Supply Rating (including Phono Motor) 105.125 volts, 60 cycles 95 watts

Pilot Lamps (2) Mazda No. 51, 6-8 volts. 0.2 amp.

Compartment Lamp (1) Mazda No. 55, 6.8 volts, 0.4 amp.

Loudspeaker Electrodynamic 92566-1W Size 12 -inch V. C. impedance at 400 cycles 2.2 ohms

Frequency Ranges Phonograph Standard Broadcast 540-1,600 kc Short Wave "C" 9.2-16 me Record Capacity Twelve 10 -in., Ten 12 -in.

Turntable 78 r.p.m. type Intermediate Frequency 455 kc Type Pickup Crystal

Motor Power consumption (115 v., 60 cycles) 30 watts Tube Complement (1) RCA 6SA7 1st Det., Oscillator (2) RCA-6SG7 I -F Amplifier (3) RCA-6SQ7 2nd Det., A. V. C. and Phase inverter (4) RCA-6SQ7 A -F Amplifier (5) RCA -6K6 -GT Power Output (6) RCA -6K6 -GT Power Output (7) ACA -5Y3 -GT Rectifier

-'PE

- RECORD SUPPORT - TURNTABLE -PICKUP TAPE

SPINDLE

RADIO CHASSIS RED RIGHT ANGLED BRACKETS

CORRUGATED PIEPER STRIPS

TWO HOLDIM SCREWS MEADS PAINTED RED

WOODEN SKID

Type Automatic 960260.1

SOr

LOUD OFF /T\ /T\

POWER VOLUME TREBLE NORMAL BASS FOREIGN DOMESTIC PHONO

TONE SELECTOR

FRONT PANEL CONTROLS

TUNING

BACK VIEW

©John F. Rider


RCA PAGE 16-39

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40 RCA

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RCA MFG. CO.

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RCA PAGE 16-41

MODELS 68R1,68R2, 68R3,68R4

©John F. Rider


42 RCA ¡MODELS 68R1,68R2,

68R3,68R4 RCA MFG. CO.

Tube and Trimmer Locations (Top View)

FM I.F. R.F.Alignment* Range Switch in FM Position

Steps


the test- osc. to-

Connect the

ground side of

the test- osc. to -

Tune test- osc. to-

Radio dial

turned to- AdPurt

1

Connect the d -c probe of a VoltOhmyst to the negative lead of the 5 mfd. electrolytic condenser, C18, and the common lead of the meter to chassis ground.

2

To one terminal of

the FM antenna in series with

.01 mfd.

To the other

terminal of the FM antenna.

10.7 mc.

30% mod. at

400 cycles. (AM)

Maximum capacity.

(Fully meshed)

tT3, bottom core for maximum d -c across C 18. Load the plate winding of T3 with a 680 ohm resistor.$

3

T3, top core for maximum d -c across C 18. Load

Same as 2. the grid winding of T3 with the 680 ohm resistors used in Step 2.

4

T1, bottom core for maximum d -c across C 18. Load

Same as 2. the plate winding of TI with the 680 ohm resistor.

5

T1, top core for maximum d -c across C 18. Load

Same as 2. the grid winding of TI with the 680 ohm resistor.

6

To one terminal of

the FM antenna in series with a 120 ohm

resistor.

To the other

terminal of the

antenna in series with a

120 ohm resistor.

106 mc. 106 mc.§ Condensers C33

and C31 for maximum d -e

output across C18.

7 Same Same 90 mc. 90 mc. Coils L2 and L3 for

maximum d -c output across CI8.

8 Repeat steps 6 & 7 until further adjustment no longer improves calibration.

*Correct alignment of the 455 kc. I.F. requires that the 10.7 mc. FM I.F. be aligned previously.

tThis method is known as alternate loading which involves the use of a 680 ohm resistor to load the plate winding while the grid winding of the same transformer is peaked. Then the grid winding is loaded with the resistor while the plate winding is peaked.

:When the windings are loaded it may be necessary to increase the 10.7 mc input since the gain will decrease resulting in a small or no reading across C18. This reading should be maintained at 2-4 volts, by adjusting the input, as each transformer is aligned.

§Completely mesh the gang and see that the pointer goes to mechanical maximum calibration point at low end of band. (Reference mark on dial back plate).

Alignment Procedure

Test Oscillator - For all alignment operations, unless specified, keep the output as low as possible td avoid A.V.C. action. Ground lead of test-osc. to chassis ground, unless specified.

Output Meter - To "correctly observe th# point of minimum a -f output, it is necessary to connect an output meter across the voice coil, and turn the receiver volume control to maximum.

"A" Band Alignment* Range Switch in BC Position

Steps

Connect the high side of the test osc.

to- Tune

test osc. to -

Turn the radio dial to- Adjust for max.

peak output.

1 AM converter

grid, pin 1, 455 kc. "A" Band

Quiet point tT4-Top core T4 -Bottom core

2 6BE6 in series at high T2 -Bottom core with .01 mfd. freq. end. T2 -Top core

1400 kc. "A" Band 1400 C37-Osc. 3 Antenna lead

in series with kc calibration pt. C34 -Ant. (Loop)

4 600 kc. "A" Band 600 kc calibration pt.

L7-Osc. Rock in.

200 mmf.

5 Repeat steps 3 and 4 unti aligned

6 When chassis is installed, readjust C34 on the loop for max. output at 1400 kc.

*Correct alignment of the 455 kc. I.F. requires that the 10.7 mc. FM 1.F. be aligned previously.

tAlign T4 and T2 by means of alternate loading. Use a 47,000 ohm resistor instead of a 680 ohm resistor. Alternate loading is explained in "FM I.F.-R.F. Alignment."

FM Ratio Detector Alignment Range Switch in FM Position

Steps Connect the high side of the test osc. to-

Tune test- osc. to- Turn

volume control to -

Adjust

1

Connect a 680 ohm resistor between pins 5 & 7 of the ratio detector tube 6AL5. Connec the d -c probe of a VoltOhmyst to the negative lead of the 5 mfd. electrolytic condenser, C18. The common lead of the meter to ground.

2

Driver grid, pin 1, of the

6A176 in series with .01 mfd.

10.7 mc. 30% mod. 400 cycles

(AM) Approx. .25 Volt output

Maximum Volume

*Driver transformer, T5 for maximum d -c

across CI8.

3

Remove the meter leads and disconnect the 680 ohm resistor from the 6AL5. Connect two 68,000 ohms (±1%) resistors in series, across the 22,000 ohm ratio detector load resistor, R17. Connect the common lead of the VoltOhmyst to the center point of the 68,000 ohm resistors, and the d -c probe to terminal "A" of the ratio detector transformer, T6. Set the meter to the 0-30 VDC scale.

4 Same as in Step 2.

Same as in Step 2.

Approx..25 Volt output.

Maximum volume.

176 bottom core for zero d -c balance.

T6 top core for min. audio output.2

5 Reconnect VoltOhmyst as in Step 1, omitting 680 ohm resistor.

6 Repeat Step 2.

7 Remove ALL connections.

*Approximately 14.5 volts. tNear the correct core position the zero point is approached rapidly and .continued adjustment causes the indicated polarity to reverse. A slow approach to the zero point is an indication of severe detuning, and the bottom core should be turned in the opposite direction.

:The zero d -c balance and the minimum a -f output should occur at the same point. If such is not the case, the two cores should be adjusted until both occur with no further adjustment of either core. It may be advantageous to adjust both cores simultaneously, watching the VoltOhmyst, and the output meter, hooked across the voice coil, for the point at which both zero d -c and minimum a -f output occur.

Note :-Two or more points may be found which will satisfy the condition required in Step 4. T6 top core should be correctly adjusted when approximately hi inch of threads extend above the can, therefore, it is desirable to start adjustment with the top core in its furthest "in" position and turn out, while adjusting the bottom core, until the first point of minimum a -f and zero d -c is reached.

©John F. Rider


RCA PAGE 16-43

MODELS 68R1,68R2, RCA MFG. CO.

jälL 68R1

Circuit Description These receivers are eight tube, table model, superhetrodyne radies. incor- porating two separate converters, one for the FM band and the other for the broadcast band. The range switch has a position in which these models can be operated as a phonograph sound channel.

Ratio Detector- These sets utilize a FM detector known as the "Ratio Detector." This type of circuit eliminates the necessity for a limiting stage.preceding the detector, and has an inherent insensitivity to amplitude modulated signals. It is desirable, that before attempting to service these receivers, that this type of circuit be completely understood. Special care should be taken in alignment. and all precautions should be carefully observed.

Note:-Two antennas, a loop for broadcast reception and a folded dipole for FM, are contained in the cabinet. Because of the directional character- istic of these antennas, it may be necessary, when interference is encount- ered, to rotate the cabinet until a point of minimum interference is found. In some locations, a phenomenon known as "Multi -Path Reception" exists which produces distortion on FM. This is not a fault of the receiver. If this condition is suspected, remove the set to another location, and check it there. An external FM antenna, such as the RCA Dipole and Reflector, Stock #225, will eliminate, or appreciably reduce this effect.

Standard Broadcasts- To install an external antenna for Standard Broadcasts, the link on the terminal board on the chassis in the back of the cabinet must be opened. Then connect the antenna, which should be a wire 40 to 60 feet long, to the terminal marked "A". A connection from "G" to ground should not be necessary but may be advantageous.


Frequency Range

Broadcast ("A" Band) 3-10-11,00 kc. Frequency Modulation (FM Band) 88-108 mc.


Broadcast 455 kc. Frequency Modulation 10.7 mc.

Tube Complement

(1) RCA 6BE6 1st Det. & Osc. FM (2) RCA 6BE6 1st Det. & Osc. AM (3) RCA 6BA6 I -F Amplifier (4) RCA 6AU6 Driver (5) RCA 6AL5 Ratio Detector (6) RCA 6SQ7 2nd Det.. A.V.C., and A -F Amplifier (7) RCA 61(6 GT Power Output (8) RCA 5Y3 GT Rectifier

Power Supply Rating

105-125 volts, 60 cycles 64 watts

Pilot Lamps (2) Mazda No. 51, 6-8 volts, 0.2 amp.

Loudspeaker 940923-7

Size 5" x 7" elliptical PM V.C. Impedance 3 4 ohms at 400 cycles

Power Output

Undistorted Maximum

2 0 watts 4 0 watts

Critical Lead Dress

1. Dress capacitor C-1 near chassis base. 2. Dress lead from pin No. 5, No. 1 6BE6 to terminal Cof transformer

T1. as near the bottom of the FM shelf as possible. 3. Dress capacitor C-23 next to chassis. 4. The lead from capacitor C-23 to the high side of the volume control

must be dressed next to chassis along front apron. 5. Dress resistor R-20 near chassis base.

68R2

\ DRIVE

SHOWN WITH GANG CONDENSEN AT HAS. CAPACITY.

3 TUNAS


68R3,68R4

68R3

DCM

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BACK VIEW

6. Dress all a -c leads away from volume control. 7. Solder NM antenna coil primary leads to terminal board with as

short a lead length as practical. 8. Make all FM leads as short as possible. Dress of all other leads

should be similar to original wiring. 9. The lead from pin No. 2. 6BA6, to ground must be dressed as close

to the base and as near to the back apron as possible. This lead provides degeneration for the IF stage and neither its length, nor the point at which it is grounded to the chassis should be changed.

©John F. Rider


44 RCA MODEL 85T8

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©John F. Rider


Ilocia/sierieze delmoncetbmi ii RCA PAGE 16-45

L4-_ -L3

/71: T AVC

8S2 GANGED

BAND -SWITCH SHOWN AT 1 ST POSITION.

BROADCAST (A) BAND 540- 1500 KC.

C4

L2

C3 C2 R2

RCA MFG. CO.

C5

6A8G 1ST DET.- OSC.

4 6

l 62 C9 1N+

BAND -SWITCH SHOWN AT 2ND POSITION CLOCKWISE .

SHORT WAVE 1 (B) BAND 2.3 - 7 MC.

44 5952_ 1

3 2

1

C1 , ¢ _ eS2

C4

C3 C2

C612 9I L9

T. C18 C32

-

R

AVC

GANGED

C5

BAND -SWITCH SHOWN 716 AT 3RD POSITION CLOCKWISE . V

SHORT WAVE 2 (C) BAND 7-22 MC.

L6

L8

L10

cli

=c12

6A8G 1ST DET.- OSC.

6A8G 1ST DET.- OSC.

CAP

R5

-1 B+

RS

B+

117

L6 R3 15 14 o -Q

= C12

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©John F. Rider


46 RCA MODEL 8578

RCA MFG. CO.

Alignment Procedure Calibrate the tuning dial by adjusting dial pointer to the

low -frequency (end) calibration mark on dial with the gang tuning -condenser plates in full -mesh position. The pointer is soldered in place on the drive cable.

L12 SEC. ADJ. 460 KC

C25

I. F -43

TRANS

6K1

1 'OEr.4OSC

2

6A8G

C24

I.F - 1 6Q1G SEC. AOJ

460 KC TRANS.

cl2 C26

RECT. 1,02 -ANT. boon nC

ó--' 53G Ir

- 5

1 1

OUTPUT

2no.DET.,A.V.C.$.

3 AUDIO

T1

©RCA MFC,.CO.,INC.

I PNONO.TERM.

1 2 3 BRD.

SN -772 ® L9-OSc.

600 MC

CIO- OSC. 6000 MC

C32-OSC. S00KC

C7-OSC. 2C,000KC

Radiofron, Coil and Trimmer Locations

F t } t . ;

I I I

I

Ì I I

355V. I

I. A.C. I

I

330VI 355v. A.C.

Ì

RECT. 243V.' I

SV3.G 255V.I

6 (-IIV.') A.0 " -0.5V. _

STEP

CONNECT HIGH SIDE OF TEST

OSC. TO - TUNE

TEST OSC TO -

TURN RADIO

DIAL TO

AATUST THE FOLLOWING FOR

MAX. OUTPUT

I.

I -F Grid in Merles with 0.01 mfd

460 KC

Quiet point near 800 Kc "A" Band

L14 L13 2nd I -F Trans.

2 1st De t. Grid In series with O.Oimfd

L12 Lii 1st I -F Trans.

3 Antenna in series with 300 ohms

6000 Kc 6000 Kc

en Band

C10 C2 Oso. Ant.

4 a)000 Kc 20000 Kc NC" Band

0,7A.

Osc.

5 Antenna in serles with 200 n fd

1500 Kc 1500 Kc

"A" Band

032 Osc.

6 600 KC 600 Kc

"AN

Band

L9 L -F Osc. Rock Gang

7 Repeat Step 5

OUTPUT 6F6 -G

Note: Two voltage values are shown for some readings. The value shown in parentheses with asterisk (6) indicates operating conditions without voltmeter loading.

l

Use +nax{sm' capacity pea A.

Osc. tracks 460 le below signal on Band.

t t t t I

I (*)¡ (-2.9V.) I -17V. -26V.1 OV. I 1

I c. G.

I

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97V.: 187V. r - - - r I ELECTCAP

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05C. 668-G

I" I. F. TRANSE LI PRI.

.. ncr ADJ.

(-2.9v. T' - - 0 V. ; r - - - 8.3V.

BROWN C24 /^ A.C. c26'- J

ELECT. I.F.

CAP. 330v. 6K7

BLACR/O L----_--____. Cl2 6.3L! -' C26 Ì A.C. 2"4.I.F.TRANS,,

I ) 1 ORI.

C-\q 1 L a (93v.')I h

47V. 2.P.OET.. - 197V.1 A.vc.qA.a

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I I 1 1

P-84140-0

-Radiotron Socket V oltages and Trimmer Locations

Measured at 115 volts, 60 -cycle supply-Tuned to approximately 1,000 kc ("Standard Broadcast") No signal being received-Volume control minimum-Tone control optional

©John F. Rider


RCA PAGE 16-47

i.SODEL 85T8 RCA MFG. CO.

Electrical Specifications FREQUENCY RANGES R -F ALIGNMENT FREQUENCIES

"Standard Broadcast" (A) 540.1,500 kc "Short Wave -1" (B) 6,000 kc (osc., ant.) "Short Wave -1" (B) 2,300-7,000 kc "Short Wave -2" (C) 20,000 kc (osc.) "Short Wave -2" (C) '7,000-22,000 kc "Standard Broadcast" (A).. 600 kc (osc.), 1,500 kc (osc.)

INTERMEDIATE FREQUENCY 460 kc

RADIOTRON COMPLEMENT POWER SUPPLY RATINGS

(1) RCA -6A8 -G First Detector-Oscillator Rating A 105-125 volts, 50-60 cycles, 75 watts

(2) RCA -6K7 Intermediate Amplifier Rating B 105-125 volts, 25.60 cycles, 75 watts (3) RCA -6Q7 -G.. Second Detector, A.V.C., and A -F Amp. Rating C.... 105-125/200-250 volts, 50-60 cycles, 75 watts (4) RCA -6F6 -G Power Output (5) RCA -5Y3 -G Full -Wave Rectifier

PILOT LAMPS (2) 6.3 volts, 0.25 amp.

POWER OUTPUT RATING LOUDSPEAKER

Undistorted 2.5 watts Type .. . 8 -inch Electrodynamic Maximum 4.5 watts V.C. Impedance 2.2 ohms at 400 cycles

REPLACEMENT PARTS

STOCK K DESCRIPTION STOCK DESCRIPTION

14380

14352 13216 12717 12607 12581 11350 12807 12714 12896 12723 14262 12404 12406 12488 12812 30433 30592 30303

4838 14393 11315

4839 12484 11203 30577

5212 4358

30621 30579 30573 30586 12800 12006 30822 30581 30572

30584 30583

5226 14028

30587 14638 14525 13819 11298 12695

RECEIVER ASSEMBLIES

Arm-Hub and arm for operating band indicator shutter -fastens on range switch shaft

Belt-Station selector drive belt Board-Antenna and ground terminal board Board-Phonograph terminal board Cap-Top shield cap for first i -f transformer Cap-Top shield cap for second i -f transformer Cap-Grid contact cap Capacitor-Adjustable trimmer (short) (C7) Capacitor-Adjustable trimmer (medium) (C32) Capacitor -15 mmfd. (C18) Capacitor -56 mmfd. (C5) Capacitor -110 mmfd. (C14, C15) Capacitor -120 mmfd. (C27, C28) Capacitor -180 mmfd. (C19) Capacitor -270 mmfd. (C21) Capacitor -450 mmfd. (C9) Capacitor -470 mmfd. (C4) Capacitor -1,600 mmfd. (C8) Capacitor-.0035 mfd. (C1) Capacitor-.005 mfd. (C23, C31) Capacitor-.01 mfd. (C20, C22) Capacitor-.015 mfd. (C30) Capacitor -0.1 mid. (C16, C17) Capacitor -0.25 mfd. (C13) Capacitor -10 mfd. (C24) Capacitor Pack-Comprising two sections, each 10 mfd.

(C12) , C28) Capacitor -16 mfd. (C25) Clamp-Mounting clamp for capacitor pack, Stock No.

30577 Coil-Antenna coil (Li, L2, L3, L4) Coil-Oscillator coil (L5, 1.6, L7, L8, L9, L10) Condenser -2 -gang variable tuning condenser (C2, C3, C8) Cord-Station selector indicator pointer cord Core-Adjustable core and stud for oscillator coil Core-Adjustable core and stud for i -f transformers Dial-Station selector dial scale Disc-Band indicator disc with celluloid window Drive-Vernier drive shaft and pinion gear for variable

condenser Drum-Station-selector drive -cord drum with set screws Indicator-Station-selector indicator pointer a n d holder

assembly Lamp-Dial lamp Nut-Jamb nut for adjustable capacitor, Stock Nos.

12807 and 12714 Pulley-Drive-belt pulley for condenser shaft Pulley-Drive-belt idler pulley Resistor -22 ohms, carbon type, } watt (R13) Resistor -270 ohms) insulated, wire -wound, 1.1 watt (R12) Resistor -5,600 ohms, carbon type, 1 watt (R6) Resistor -15,000 ohms, insulated, é watt (R17)

30151 14284 12454 12199 13005 11452 11626 13601 30582 14343 14350

14340

3682 12008 5119

11196 14114 12007 30585 30588 30820 30574 14376 14308

30571

30617

30575

14356 19868 12012 11469 12642 5118

14360 14358

14355 14357

30593 14359 14289 14267 14270

4982

Resistor -18,000 ohms, insulated, 1 watt (R3) Resistor -22,000 ohms, carbon type, 1/10 watt (R7) Resistor -33,000 ohms, insulates, } watt (R1) Resistor -270,000 ohms, insulated, } watt (R10) Resistor -390,000 ohms, carbon type, 1/10 watt (R11) Resistor -470,000 ohms, carbon type, 1/10 watt (R2) Resistor -2.2 meg., carbon type, t watt (R4, R9) Resistor -10 meg., insulated, j watt (R14) Retainer-Band indicator disc retainer Ring-Retaining ring for range switch shaft Screw-No. 8-32 x 3/16 -inch square -head set screw for

drum, Stock No. 30584; arm, Stock No. 14380, and pulley, Stock No. 30587

Shalt-Drive pulley and knob shaft-fastens on range - switch shaft

Shield-Radiotron shield Shield-I-f transformer shield can Socket-S-contact speaker cable socket Socket -8 -contact Radiotron socket Socket-Dial lamp socket Spring-Retaining spring for core, Stock No. 12008 Spring-Tension spring for pointer cord Spring-Tension spring for idler pulley Switch-Range switch (S1, S2) Tone control and power switch (R18, S3) Transformer-First i -f transformer (L11, L12, C14, C15) Transformer-Second i -f transformer (LIS, L14, C19,

C27, C28, R7) Transformer-Power transformer, 105-125 volts, 25-60

cycles (T1) Transformer-Power transformer, 105-125 and 200-250

volts, 50-60 cycles (T1) Volume Control (R8)

REPRODUCER ASSEMBLIES (RL -63F-1) Board -3 -contact reproducer terminal board Cap-Cone center dust cap Coil-Field coil (L16) Coil-Hum neutralizing coil (L17) Cone-Reproducer cone and dust cap (L15) Plug -3 -contact male plug for reproducer Reproducer-Complete Screw-Screw, washer, and lockwasher to hold core in

yoke Transformer-Output transformer (T2) Washer-Spring washer to hold field coil

MISCELLANEOUS ASSEMBLIES Escutcheon-Dial escutcheon and crystal Knob-Station selector knob Knob-Tone control, volume control, or range -switch knob Screw-Chassis mounting screw and washer assembly Spring-Retaining spring for knob, Stock No. 14269 Spring-Retaining spring for knob, Stock No. 14359

©John F. Rider


1010/44414eddciea rr RCA PAGE 16-49

L11q óLí2

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RCA MFG. CO.

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DENOTES CHASSIS GROUND.

BAND -SWITCH SHOWN AT 1 ST POSITION. BROADCAST (A) BAND

LOW TONE 535-1720 KC

125K7 R. F.

8

L11

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FRONT

109 52 REAR

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BAND -SWITCH SHOWN AT 3RD POSITION

SHORT WAVE (C) BAND LOW TONE

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CIS IS DISCONNECTED (OPEN TO GROUND)AT S2. OTHERWISE IT IS IDENTICAL TO POSITION 4 1

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INSLTED FROM CHASSIS

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BY C 26 (0.2 us) AND R18 (220Kn1 - DI '.OTES CHASSIS

GROUND

NOTEI IN THIS POSITION

C15 15 CONNECTED THE SAME WAY AS SHOWN IN 157 POSITION

"CLARIFIED'¡

©John F. Rider


50 RCA MODEL 515 RCA MFG. CO.

Alignment Procedure 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.


aide of test-osc. to-

Tune test osc. to- Turn radioAdjust

dial to- the fol - lowing for max.

peak output - 1

I -F grid in series with 0.1 mfd.

455 kc "A" Band

Quiet Point 1,600 kc

end of dial

C23, C22 2nd I -F Trans.

2 1st Det. grid

in series with 0.1 mfd.

C21, C20 lat I -F Trans.

3 Ant. terminal in series with

47 mmfd. 19 me "C" Band

19 me C18 (osc.)


side of test-osc. to-

Tune teat ac. to

Turn radio dial to-

Adjust the fol - lowing for tasa peak output -

4 . Radiated Signal, 18 me "C" Band Resonance on Signal

C31 (ant.)

5 Radiated Signal, 8.1 me L12*


200 mfd. m 1,720 kc " Band "A

A" 0 C35 (osc.)

7 Radiated signal 1,400 kc

(Link closed) Resonance on Signal C33 (ant.)


200 mmfd. 590 kc "A" Band

590 kc C36 (oat.)

9 Repeat steps 6, 7 and 8

e Adjust by dressing proximity of AVC lead to coil.

C31 -.VIT C16-OSC 18 MC. 19 MC.

12 UI

/momm. C36 05C C55 -05C 590 KC. 1720 KC

C20 -PR, C21-5EC 455 KC

C22.PR,. C23-5eC 455 ,<C

----L OOP 'G 53 -ANT 1400 KC.

Precautionary Lead Dress. - 1. Dress all capacitors, leads, etc., coming close to osc. coil rigidly

and as far as possible from it. 2. Dress blue lead from loop trimmer against loop and around outside

of 35Z5GT tube. 3. Dress leads of 120 mmfd. capacitor from terminal board to grid of

12SA7 as short and direct as possible. 4. Dress blue lead from SW ant, coil through same hole in base

through which green lead from stator of rear section of the variable condenser passes.

Replacement Parts Insist on genuine factory -tested parts, which are readily identified and say be purchased Eros authorized dealen.


Unit List Price

STOCK No.

DESCRIPTION Unit List Price

CHASSIS ASSEMBLIES 6134 Resistor -1,200 ohms, 1 watt .22 (RC -1000C) 12955 Resistor -3,900 ohms, } watt .20 12454 Resistor -33,000 ohms, 4 watt .20 36947 Board -"Antenna -Ground" and phono input board .25 12412 Resistor -47,000 ohms, } watt .20 35998 Capacitor -Mica trimmer for loop .25 12264 Resistor -220,000 ohms, } watt .20 36880 Capacitor -Mica trimmer -1 section 2-20 mmíd. 30648 Resistor -470,000 ohms, i watt .20 and 1 section 300-800 mmfd. .60 12928 Resistor -3.3 meg., } watt .20 11859 Capacitor -Adjustable trimmer -3-30 mmfd. . .25 30271 Resistor -4.7 meg., } watt .20 12896

12723 Capacitor -15 tumid. Capacitor -56 =laid.

.35

.35 30992 36897

Resistor -10 meg., * watt Shaft -Tuning knob shaft

2Q, .111 12724 Capacitor -120 mmfd. .35 34449 Socket -Dial lamp socket .30 12488 Capacitor -270 mmfd. .35 31251 Socket -Tube socket 31405 Capacitor -6,000 mmfd. .75 31418 Spring -Drive cord spring, .25

34506 Capacitor -.0018 mfd. .25 36881 Switch -Range switch .06

1.25 33584 Capacitor -.005 mfd. .25 36232 Transformer -First I.F. transformer 1.50 4937 Capacitor -.01 mid. .25 36233 Transformer -Second I.F. transformer 1.50 11315 Capacitor -.015 mfd. .20 36800 Transformer -Output transformer 1.30 5196 32787

Capacitor -.035 mfd. Capacitor -.05 mfd.

.20

.20 33726 Washer "C" washer to hold tuning shaft .02

4839 Capacitor -0.1 mfd. .30 SPEAKER ASSEMBLIES 34505 36301

Capacitor -0.2 mfd. Capacitor -Electrolytic comprising 1 section of

.30 (RL -81B2) 30 mfd. 150 volts, and 1 section of 50 mfd. 35570 Cone -Cone complete with voice coil 1.20 150 volts 1.25 37612 Speaker -5 -inch permanent magnet speaker corn - 35713 Coil -Antenna coil .75 plete with cone and voice coil -less output 35096

36937 Coil -Loop piimary coil ;oil -Oscillator coil

.50

.85 transformer 3.50

36876 36242

iLondenser-Two gang variable tuning condenser Control -Volume control and power switch

3.00 1.50

MISCELLANEOUS ASSEMBLIES 32634 Cord -Drive cord (approx. 50 inches long overall) .10 36302 Back -Cabinet back -less red lead wire and 36237 Drum -Tuning condenser drive cord drum .25 terminal .15 37068 Indicator -Station selector indicator .20 36873 Clamp -Dial clamp .10 36882 Loop -Antenna loop complete 2.00 37929 Dial -Glass dial scale 36877 Loop -Loop winding only -less support, primary 37831 Fastener -Push -on fastener .10

coil, and trimmer .55 37386 Knob -Range switch knob .25 37928 Plate -Dial back plate complete 1.00 36541 Knob -Tuning or volume control knob .20 36230 Pulley -Drive cord pulley .04 11765 Lamp -Dial lamp, Mazda No. 51 .15 30189 Resistor -120 ohms, i watt .20 11349 Spring -Retaining rings for knobs .05

ALL PRICES ARE SUBJECT TO CHANGE OR WITHDRAWAL WITHOUT NOTICE.

©John F. Rider


BRUNSWICK PAGE 16-1

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©John F. Rider


2 RADIO WIRE MODEL BP -12 RADIO WIRE TELEVISION

This receiver will operate either from batteries contained within the case or from the regular Electric mains (AC or DC) on voltages from 105 to 125. A self-contained antenna is built in and will give good performance from stations not too remote. Where signal strength is poor or where reception from great distances is required, Antenna (A) and Ground (G) terminals are provided. These are located on the rear of the case. An antenna from 50 to 100 feet long may be used.

TTERIES - The following batteries are required where no electric power is

a ailable: 7/1 Volt "A" - USALITE #687, BURGESS #G5, GENERAL #5-H-5 - or equivalent

(4-3/8" X 3*" X 2-3/4") - i Required 45 Volt "B" - USALITE #624, BURGESS #B30, GENERAL #V -30-B, EVEREADY #762

ADVANCE #267 - or equivalent (5-11/32" X 2-17/32" X 4-3/16") - 2 Required

TO INSTALL BATTERIES - Access to the battery compartment may be had by opening the bottom flap on the back of the cabinet. Insert the "B" batteries on each side, slide the "A" into place, then screw the wood block to the bottom to hold batteries. (See diagram). With the ELEC-BATT switch on the front panel in the BATT position, the receiver is now ready for operation as a portable unit. When prolonged operation in the "ELECTRIC" position is contemplated (as during the winter season), it is advis- able to remove the batteries and store them in a cool, dry place. DO NOT leave exhausted batteries in the carrying case as chemical action may expand the batteries and make it difficult to remove them.

WAVE BAND: The range covered is as follows: 175 - 555 METERS (1720 - 540 KC)

OPERATION BATTERY

After the batteries have been installed in accordance with the instructions given above, set the slide switch on the front of the cabinet to the right.

ELECTRIC Open the small door on the rear of the cabinet providing access to the power cord which can be plugged into any outlet (105 to 125 Volts AC or DC.) Slide the switch on the front of the cabinet to the left.

The receiver may now be operated by turning the LEFT hand knob to the right, (Clockwise). The Volume is turned up and the station tuned in. (Right hand knob). By rotating the cabinet slowly (when the self-contained loop is used) maximum signal with minimum noise may be obtained. The direction effect is

lost when a large antenna is used, but in this case, ample signal is obtained to be heard above the noise level. The volume is adjusted for the desired level.

NOTE:- When this set is to be operated from the 115-125 Volt DC line and no signal can be tuned in with the power switch in the "ELECTRICw-position, reverse the plug in the light socket one-half turn. When operating on AC, a slight hum may be heard on some stations. Reversing the line plug one-half turn in the socket will alleviate this condition.

©John F. Rider



©John F. Rider


4 RADIO WIRE MODEL J51P RADIO WIRE TELEVISION

This is a portable, 5 -tube

superheterodyne radio, designed

for operation from a self-con-

tained battery pack or a power

line of 115 volts AC or DC cur-

rent. It has a tuning range

from 550 to 1700 kilocycles.

power supply The battery pack is a standard pack made by the Eveready

Company (No. 754). The Burgess equivalent is the Burgess

No. G6M6O or the Ray 0 Vac equivalent. The life of the

packs depend on how often the radio is used on batteries.

CAUTION: When NOTin use, be SURE that the center knob is

in the OFF position, else batteries will be damaged or

drained, affecting the operation. If reception becomes

weak or distorted, have the batteries checked by your

dealer or service man.

"HE INTERMEDIATE FREQ-

UENCY IS 455 KC. TO

ALIGN, SET THE OSCILL-

ATOR TO 550 AND 1650 KC,

ALIGNING THE RF AT 1z.00

KC.

TUBES: The following tubes, together with their substitutes

in certain models, are used: 1A7 or 1R5 Mixer -Oscillator,

1N5 or 1T4 IF Amplifier, 1H5 or 1S5 Detector -RF Amplifier-

AVC, 3Q5 or 3Q4 Power Amplifier or Audio Amplifier, and

117Z3 rectifier.

©John F. Rider



RADIO WIRE TELEVISION MCD EL MC -11

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-6 RADIO WIRE MODEL MC -11

TUNE

RADIO WIRE TELEVISION

TONE VOL.CONT

n n

I I

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/::ET 0 ZOGC

Slug Tuned I.F.

E F D B

Tubes

Power

Tuning

used (6) 12AT6 Det.,

supply 110-125

Range-Broadcast volts AC/DC.

12BA6 RF amplifier; 12BE6 converter; 12BA6 IF amplifier; AVC, AF; 5095 power output; and 35W4 rectifier.

volts AC/DC.

550 Kc to 1720 Kc Rating .24 amp g 117

ALIGNMENT INSTRUCTIONS - READ CAREFULLY Use isolation transformer be at a maximum and ment screwdriver for adjusting.

if available. output of signal

If not, connect a capacitor in series with low side to chassis. Volume control should generator no higher than necessary to obtain output reading. Use insulated align-

Dummy Antenna

Signal Generator Coupling

Signal Generator Frequency

Gang Condenser Position

Output Meter

Adjust Remarks

.05 Mfd. High side of Mixer tube Grid (12BE6)

Loop

Loop

455 Kc

1720 Kc

1500 Kc

Stator Turned out to minimum Capacity position

Stator Turned out to minimum Capacity position

Tune gang to resonance

Across Voice Coil

Across Voice coil

Across Voice coil

A, B, C, D

E

F

Adjust for maximum output. If iso- lotion transformer is not used, re - duce dummy ant. to .001 MFD. to reduce hum modulation.

Fashion loop from few turns of wire and radiate signal into set. Adjust for maximum output.

Fashion loop from few turns of wire and radiate signal into st. `. Adjust for maximum output.

©John F. Rider


RADIONIC PAGE 16-1

MODEL 14B

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IF PEAR 455 RC

DESCRIPTION PRICE`

Paper condenser .05/400 v. .21 N "

.01/ " .18

.002/" .17

.02/ " .18 " .05/200 v. .19

M .005/" .17 .001/500 v. .18

Mica " 100 mm!' .19 47 " .17

Resistor 1JK ohm w. .05 4.7 meg ohm jw. .05 220 ohm e- w. .05 2200 ohm 2 w. .18 18 ohm 4 w. .05 47 1 w. .10

350K ohm ÿ w. .05

DESCRIPTION PRICE Plastic cabinet walnut 2.40

5877 Speaker and output transformers 3.19 39156 Plastic knob tuning .30 39157 volume .13 62192 Cabinet back .25

Instruction book 1673 Variable condenser

3.65

2073 Electrolytic condenser unit 50-30 ?sr 150 v. 1.6u

2479 Volume control with switch 2 meg ohm 1.2'2

29182 Antenna coil 1.05 28184 Oscillator coil .75 3376 I.F. transformer 2.05 5580 Antenna hank .37

Line cord 75

©John F. Rider


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ORIGINAL DRAWING 1-10-47 DESCRIPTION PRICE

Pager condenser .05 mf 400 v. .21 .002. 200 v. .17

.19

.17

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16K ohms 4 W. .15

4.7 meg ohms -i w. .15 220K " .15 2200 2 w. .18 o

18 7 W. .15 47 " 1 w. .15

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>,

DESCRIPTION

A403 Cabinet, -::;,d lrss lia 13.35 5977 Speaker and output transformer 3.31 39160 Knob, tuning wood .30

39161 Knob, (volume, phono -radio) .15 `_9307 Instruction book .05 1675 Variable condenser 4.00 2073 Electrolytic condenser unit 50-30 mf/150 v. 1.70

2 48:/ Volume control 2 meg with Switch 1.20 28184 Oscillator coil .75 28185 Antenna coil (chassis 470-1) .80 3376 I.F. transformer 2.20 28186 28189 Loop and loading coil (chassis 470-2) 1.75 5559 Line cord .75 3829 Switch radio/phono .95 6343 Pick-up arm and rest 7.65 641n Motor and turntable 8tt

9.70 Lifetime needle 1.30

PRICE

©John F. Rider


REGAL PAGE 16-1 REGAL ELECTR NICS CORP. MODELS 800,801

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2 REGAL MODEL 900 MODEL 1049

AF:eDEL 900

REGAL ELECTRONICS CORP.

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25H7 250 MMFC. '4A7

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SLP PLY 45-131

130-118

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495 n C.

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220Kí1 40-104

K EQUALS '00011

ALL RESISTORS WATT UNLESS 0THERW,5E SP CIFIED

ALL VOLTAGE READINGS TAKEN WITH 2O pc. A PER VOLT METER

TUNING RANGE 540-1650 KC SC. SHORTWAVE - CLOCKWISE 58-183MC

I10-120 V.. AC. -D.0 SUPPLY 45 -IO I

130-125

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3525 35L6 125K7 12547 n 123(37 125Q7

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REGAL ELECTRONICS CORP. I 049 P.M.

SPEAKER 110-101

©John F. Rider


%I d[Si!ºIltalfCá. ll REGAL PAGE 16-3

REGAL ELECTRONICS CORP. MODEL 900'

BAND -SWITCH SHOWN AT 1ST POSITION BROADCAST BAND

540-1650 KC.

05µf

30-103 PRI.

30-109

C 10

1 '

220 Kn

05µf I

125G7 125H7 14 A7 R -F AMPL.

95-102

AV C

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95-102

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+90V

@John F. Rider


IN didgefftedics // PAGE 16-4 REGAL !MODEL 1049 REGAL ELECTRONICS CORP.

.05µ f

95-102

N

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12567 125H7 14 A7 R -F AMPL.

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540- 1650 KC.

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BAND -SWITCH SHOWN AT 2ND POSITION CLOCKWISE

SHORT WAVE BAND 5.8-18.3 MC.

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30-112

30-104 III III

+90V

®John F. Rider


REXEL PAGE 16-1

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2 REXEL

MODEL L-266 'REXEL MERCHANDISE CO.

WHEN SERVICING THIS RECEIVER DO NOT PLACE CHASSIS ON A GROUNDED METALLIC BENCH.

For tube replacement it is not necessary to remove the chassis from the cabinet. Access to the tubes may be made by removing the center screw on the loop holding same to the bracket, and then lifting loop carefully off the bracket so as to avoid breaking of wires connecting same.

For ALIGNMENT the chassis must be removed from case. Remove first batteries and then the three screws holding chassis to the bottom of the shelf.

ALIGNMENT

Equipment Required: Modulated r -f signal generator; output meter; insulated screw driver; two .1 mfd 400 volt and one 50 mmfd 400 volt condensers.

Turn variable condenser fully counterclockwise (plates fully closed) and check that pointer coincides with the first thin calibration nmark on the dial. Connect the output meter and signal generator as follows:

Output meter: Connect across voice coil and turn volume control to maximum.

Signal generator: Connect the low side of the signal generator to the receiver chassis thru a .1 mfd condenser and keep output as low as possible, then proceed in the sequence shown on the alignment chart.

BATTERIES

The batteries recommended for this receiver are two ßr746 "Eveready" 41 volt batteries (National Carbon Co.) and two 47482 "Eveready" 45 volt batteries (National Carbon Co.) or replacement types of equal size and voltage. To replace batteries, remove back of cabinet by pulling at top of back. Batter- ies are accessible without removing chassis or loop. Consult layout drawing for correct placement and connections of batteries.

Part No. REPLACEMENT PARTS

Description Part No. Description

BK -405 Bracket -Resistor mounting bracket RCP 10W6502A Condenser-.005/600WV paper tub- BT -232 Battery -41/2 volt battery (A) ular condenser BT -233 Battery -45 volt battery (B) RE -407 Resistor -2600 ohms ±5% 10 watt BU -I87 Bulb -pilot light bulb 6.3v (p47 resistor

Mazda) REB 105M Resistor -I megohm -20% 1/2 watt CA -472 Cabinet -portable cabinet resistor CB -335 Cable -battery cable REB152M Resistor -I 500 ohms X20% 1/2 watt CL -176 Coil-R.F. coil, shielded resistor CL -177 Coil -oscillator coil REB224M Resistor -220,000 ohms '20% 1/2

CO -182 Condenser -80/20/ 150WV & watt resistor 100/ISWV electrolytic condenser REB225M Resistor -2.2 megohms -±-20% 1/2

CR -299 Crystal -dial crystal watt resistor CT -388 Condenser -220-680 mmfd padder

condenser REB270K Resistor -27 ohms 10% 1/2 waft

resistor CV -146 Condenser -3 gang variable con-

denser (with pulley) REB335M Resistor -3.3 megohms -'-20% 1/2

watt resistor DL -39I Dial -metal dial scale REB47I M Resistor -470 ohms =20% 1/2 watt ES -274-3 Escutcheon -moulded escutcheon resistor KN -260 Knob -walnut knob REB474M Resistor -470,000 ohms ±20% 1/2

KN -261 Knob -walnut knob with dot watt resistor LC -315 Line Cord -540 ohms resistance line

cord REB683K Resistor -68,000 ohms -±10°/,, 1/2 watt

resistor LP -178 Loop -Antenna REB685M Resistor -6.8 megohms ±20% 1/2

P0-395 Pointer -dial pointer watt resistor PT -383 Control -volume control 2 megohms

with D.P.S.T. switch REC332K Resistor- 3300 ohms 2--10% I watt

resistor RCM20A 100M Condenser -10 mmfd ±20% mica

condenser REDIOIM Resistor- 100 ohms =20% 2 watt

resistor RCM20A470M Condenser -47 mmfd ±20% mica SD -607 Shield -Tube Shield

condenser 5K-156 Speaker -5" P.M. Speaker with out- RCP I OW2104A Condenser-.I-200WV paper tub- put transformer

ular condenser SO -572 Socket -pilot light socket assembly

RCP 10W2203A Condenser-.02/200WV paper tub- SP -19I Spring -Drive shaft retaining spring

ular condenser SW -185 Switch -battery --electric D.P.D.T.

RCP 10W4503A Condenser-.05/400WV paper tub- slide switch ular condenser TR -186 Transformer-I.F. 455 K.C. Trans-

RCP I OW6I 03A Condenser-.01/600WV paper tubular condenser

former

RCP 10W6202M Condenser-.002/600WV paper tubular condenser

©John F. Rider


RE XEL PAGE 16-3

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4 REXEL MODEL L -266-A

REXEL MERCHANDISE CO.

WHEN SERVICING THIS RECEIVER DO NOT PLACE CHASSIS ON A GROUNDED METALLIC BENCH



ALIGNMENT Equipment Required: Modulated r -f signal generator; output meter; insulated screw driver; two .1 mfd

400 volt and one 50 mmfd 400 volt condensers.

Turn variable condenser fully counterclockwise (plates fully closed) and check that pointer coincides with the first thin calibration mark on the dial. Connect the output meter and signal generator as follows:


Signal generator: Connect the low side of the signal generator to the receiver chassis thru a .1 mfd con-

denser and keep output as low as possible, then proceed in the sequence shown on the alignment chart.

BATTERIES

The batteries recommended for this receiver are two #746 "Eveready" 41 volt batteries (National Carbon Co.) and two #482 "Eveready" 45 volt batteries (National Carbon Co.) or replacement types of equal size and voltage. To replace batteries, remove back of cabinet by pulling a+ top of back. Batter- ies are accessible without removing chassis or loop. Consult layout drawing for correct placement and connections of batteries. REPLACEMENT PARTS

Part No. Description Part No. Description

BK -405 Bracket -Resistor mounting bracket RCPIOW6502A Condenser-.005/600WV paper tub-

BU -187 Bulb -pilot light bulb 6.3v (#47 ular condenser

Mazda) RE -407 Resistor -2600 ohms 5% 10 watt CA -472 Cabinet -portable cabinet resistor

CB -335 Cable -battery cable REB 102M Resistor -1000 ohms 20'. 1/2 watt CL -177 Coil -oscillator coil resistor CL -630 Coil-R.F. coil REB 105M Resistor -I megohm `20% 1/2 watt CO -182 Condenser -80/20/ 150WV & resistor

100/ 15WV electrolytic condenser REB 152M Resistor -I 500 ohms " 20% 1/2 watt

CO 808 Condenser -50 mfd /25 W.V. elec- resistor

trolytic condenser REB224M Resistor -220,000 ohms 20°ó I/2

CR -299 CT -388

CV -146

DL -391

Crystal -dial crystal Condenser -220-680 mmfd padder

condenser Condenser -3 gang variable con-

denser (with pulley) Dial -metal dial scale

REB225M

REB270K

REB 333M

watt resistor Resistor -2.2 megohms 20% 1/2

watt resistor Resistor -27 ohms 10% 1/2 watt

resistor Resistor -33,000 ohms ±-20% 1/2 watt

ES -274-3 Escutcheon -moulded escutcheon resistor KN -260 Knob -walnut knob REB335M Resistor -3.3 megohms ±20% 1/2

KN -261 Knob -walnut knob with dot watt resistor LC -3I5 Line Cord -540 ohms resistance line

cord REB 681M Resistor -680 Ohms 20% 1/2 watt

resistor LP -178 P0-395 PT -576

Loop -Antenna Pointer -dial pointer Control -volume control I megohm

REB685M Resistor -6.8 megohms 20% /2 watt resistor

with D.P.S.T. switch REC 222M Resistor -2200 ohms '-20% 1 watt

RCM20A 101 M Condenser -100 mmf ±200/ mica resistor

condenser REDIOIM Resistor- 100 ohms - 20% 2 watt RCM20A470M Condenser -47 mmfd `20% mica resistor

condenser SK -476 Speaker -5" P.M. Speaker with out- RCP IOW2104A Condenser-.I/200WV paper tub- put transformer

ular condenser SO -572 Socket -pilot light socket assembly

RCP I 0W4503A Condenser-.05/400WV paper tub- SP -191 Spring -Drive shaft retaining spring

ular condenser SW- 185 Switch -battery -electric D.P.D.T.

RCP I OW6103A Condenser -.01 /600WV paper tub- slide switch

ular condenser TR -707 Transformer-I.F. 455 K.C. input - Transformer

TR -708 Transformer -Output I.F. 455 K.C. Transformer with built-in I.F. filter

©John F. Rider


6 REXEL

MODEL L -266-U REX EL MERCHANDISE CO.



ALIGNMENT Equipment Required: Modulated r -f sighal generator; output meter; insulated screw driver; two .1 mfd

400 volt and one 50 mmfd 400 volt condensers.

Turn variable condenser fully counterclockwise (plates fully closed) and check that pointer coincides with the first thin calibration mark on the dial. Connect tl,e output meter and signal generator as follows:


Signal generator: Connect the low side of the signal generator to the receiver chassis thru a .1 mfd condenser and keep output as low as possible, then proceed in the sequence shown on the alignment chart. BATTERIES

The batteries recommended for this receiver are two #746 "Eveready" 4 } volt batteries (National' Carbon Co.) and two #482 "Eveready" 45 volt batteries (National Carbon Co.) or replacement types of equal size and voltage. To replace batteries, remove back of cabinet by pulling at top of back. Batter- ies are accessible without removing chassis or loop. Consult layout drawing for correct placement and connections of batteries. REPLACEMENT PARTS

Part No. Description Part No. Description

BK -405 Bracket -Resistor mounting bracket RCPI0W6202M Condenser-.002/600W.V. paper tub - CA -472 Cabinet -portable cabinet ular condenser CB -335 Cable -battery cable RCP I 0W6502A Condenser-.005/600W.V, paper tub - CL -176 Coil-R.F. coil, shielded ular condenser CL -177 Coil -oscillator coil RE -407 Resistor -2600 ohms '-5% 10 watt CO -182 Condenser-80/20/150WV. & resistor

100/15W,V. electrolytic condenser REB105M Resistor -I megohm 120% 1/2 watt CR -299 Crystal -dial crystal resistor CT -388 Condenser -220-680 mmfd padder REB152M Resistor -1500 ohms -'-20%, 1/2 watt

condenser resistor CV -146 Condenser -3 gang variable con- REB224M Resistor -220,000 ohms r-20% 1/2

denser (with pulley) watt resistor DL -39I Dial -metal dial scale REB225M Resistor -2.2 megohms ±20% 1/2 ES -274-1 Escutcheon -moulded escutcheon watt resistor KN -260 Knob -walnut knob REB270K Resistor -27 ohms -.:10% 1/2 watt KN -261 Knob -walnut knob with dot resistor LC -223 Line Cord REB335M Resistor -3.3 megohms ±20% 1/2

watt resistor LP -178 Loop -Antenna REB47IM Resistor -470 ohms X20% 1/2 watt P0-395 Pointer -dial pointer resistor PT -383 Control -volume control 2 megohms REB474M Resistor -470,000 ohms ±20% 1/2

with D.P.S.T. switch watt resistor RCM20A 100M Condenser -10 mmfd 20% mica REB683K Resistor -68,000 ohms -±10% 1/2 watt

condenser resistor RCM20A470M Condenser -47 mmfd 20% mica REB685M Resistor -6.8 megohms ±20% 1/2

condenser watt resistor RCP I OW2104A Condenser -.I /200W.V. paper tub- REC332K Resistor -3300 ohms 110% I watt

ular condenser resistor RCPIOW2203A Condenser-.02/200W.V. paper tub- SD -607 Shield -Tube Shield

ular condenser SK -156 Speaker -5" P.M. Speaker with out- RCPIOW2254A Condenser-.25/200W.V. paper tub- put transformer

ular condenser SP -191 Spring -Drive shaft retaining spring

RCP IOW410.4L Condenser-.I/400WV. paper tub- SW -193 Switch -battery -electric T.P.D.T.

ular condenser slide switch

RCP IOW4503A Condenser-.05/400WV. paper tub- TR -186 Trans

formemer-I.F. 455 K.C. Trans -

r ular condenser

RCP IOW6103A Condenser-.01/600W.V. paper tubular condenser

©John F. Rider


RYAN PAGE 16-1

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MODEL C5TS3

©John F. Rider


?AGE 16-2 R YAM MODEL C5TS3

RYAN SALES CO.

FIG. I - Tube and Trimmer Locations (Top View)

ALIGNMENT PROCEDURE

Alignment Frequencies:

I.F 456 Kcs.

R.F .1500 Kcs.

I. F. Alignment:

Connect output meter across the voice coil. Turn

the receiver volume control to maximum. Connect high

side of the alignment oscillator, through a .05 mfd.

capacitor, to the converter grid.

Set alignment oscillator at 456 Kcs. and adjust output to give the lowest conveniently readable indication on the output meter. Adjust trimmers C-7 and

C-8 in 2nd I.F. transformer to give maximum indication on output meter. Repeat this procedure for

trimmers C-5 and C-6 in the 1st I.F. transformer. Repeat procedure to check accuracy.

R. F. Alignment:

Retain output meter connected as above and re-

ceiver volume control set at maximum. Connect align-

ment oscillator to antenna.

Set alignment oscillator at 1500 Kcs. and place in

operation. Rotate receiver tuning capacitor (C-1 and

C-3) to give maximum signal indication on output meter. Adjust output of alignment oscillator to give the lowest conveniently readable indication on the

output meter. Adjust oscillator trimmer C-4 to peak the signal indication on output meter. Then, adjust antenna trimmer C-2 to further peak the signal. Re-

peat procedure to check accuracy.

Trimmer locations are shown in Figure 1.

o o ALL VOLTAGES MEASURED BETWEEN TERMINAL AND COMMON NEGATIVE WITH NO SIGNAL INPUT AND 117

VOLTS A.C. SUPPLY.

,85 DC --90 DC

- -3 DC

-25 AC

38 AC -

90 DC

90 DC 80 DC -

25 AC

85 OC

88 AC/ 90 DC

110 DC ,

Ar 88 AC

12.5 AC t R-10

VARIATIONS

-12.5 AC

0 VOLTS

OP 320% PERMISSIBLE

O©0 'mew O

o si

3s

7 AC,

55 DC

c

5 DC

FIG. 2 - Socket Terminal Voltages (Bottom View)

NOTES:

An electronic voltmeter may be connected to the AVC bus and used for alignment indication in lieu of the output meter across the voice coil.

An electronic voltmeter or a voltmeter with a

minimum resistance of 20,000 ohms per volt should be used for voltage measurements.

The polarity of the power connection must be correct when operating the receiver on direct current. If the receiver does not operate when the power plug is first inserted, remove and re-insert in opposite position. Reversal of plug position on alternating current supply may reduce hum in some cases.

If the 8LECTONE is to be used in a Location remote from broadcasting stations or the reception of distant stations is desired, an outdoor antenna and a ground connection may be utilized. The outdoor antenna should be connected to the indoor antenna and the ground lead to the chassis.

GENERAL DESCRIPTION

The Model C5TS3 ELECTONE is a four tube and recti-

fier super -heterodyne broadcast entertainment receiver

designed for operation fron, either a direct or alter-

nating current power source. The circuit utilizes

multi -unit tubes and incorporates automatic volume con-

trol. The chassis is enclosed in an all -metal cabinet

of modern styling and having the following dimensions:

Width 12": Depth 7"; Height 7".

OUNLOCK AND REMOVE CO/N BOX e UNSCREW Q To

BRACNE RELEAlSE

OAPPLY PRESSURE AT 0 TO UNFASTEN P/N Q

®UNSCREW NUT@WITHWRENCH SOCMET

-FOR PERMANENT MOUNTING --

USE SCREW HOLES FOR TABLE MOUNTING

USE SCREW NOLFS © FOR WALL MOUNTING

(USE TH/Ch WASHEOS'l .,. .c.9,8ETWEEN PAO/O 4N0 T49L E 00 M.U.

©John F. Rider


SCOTT PAGE 16-1

SCOTT RADIO LABS. INC. MODEL IMPERIAL.A11 Wave

NOV. 30, 1936

6C6 GRID WIRES I I

+ d o

.05-200

o o

o

REVISED VOL. RANGE EXPANDER

500,00011

6A7

.01- 600

2 S. MES.

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4 3

200011

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6C6 GRID

.05-600 CAPS

4 II

iC0 0ó`0 - .n

+250

1.25-300X C.5-200)

6C6

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750000.0.

40011 o h

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C

CHANGED TO 75011 DEC.3 1936

TO CABLE & ADAPTER

- 20 V.

4250V. .

H >a00o0000< 6.3V A . C. GND.

SCOTT RADIO LABORATORIES INC. CHICAGO 40 ILLINOIS

©John F. Rider


c,'...page 16-2 pack bell odel 5da packard bell c an early run of these receivers utilized...

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