1952 RCA 21T176 - Early Television Foundation

PHOTO FACT* Folder 

RCA 

MODELS 21T176, 21T177, 21T178, 21T179 

VERT. 

HOLD 

CONTROL 

HORIZ. 

HOLD 

CONTROL 

o 

om 

to 

CONTRAST; 

CONTROL 

3 N 

10 

BRIGHTNESS 

CONTROL 

VOLUME 

CONTROL 

ON-OFF SW 

TV-PHONO 

TONE 

CONTROL 

STATION 

SELECTOR 

SWITCH 

FINE 

TUNING 

RCA Victor 21TI78 

TRADE NAME RCA Victor Models 21T176, 21T177, 21T178, 21T179, (Chassis KCS68C,CB) 

MANUFACTURER RCA Victor Div., Radio Corp. of America, Camden, N. J. 

TYPE SET Television Receiver 

TUBES 

Twenty Five 

N 

CO 

K> 

POWER SUPPLY 110-120 Volts AC - 60 Cycle 

TUNING RANGE—Channels 2 thru 13 

RATING 2.7 Amp. 

INDEX 

Alignment Instructions ............ . 6, 7 

Disassembly Instructions 8 

Horizontal Sweep Circuit Adjustments 10 

Parts List and Descriptions 13 t hru 16 

Photographs 

Cabinet - Rear View .10 

Capacitor and Alignment Identification 4,9 

Chassis - Top View 3 

Photographs (cont.) 

High Voltage Supply 18 

RF Tuner .. 11,18 

Resistor and Inductor Identification 12,17 

Resistance Measurements 8 

Schematic 2 

Tube Placement Charts 5 

HOWARD W. SAMS & CO., INC. • Indianapolis S, Indiana 

"The listing of any available replacement part herein does not constitute in any 

case a recommendation, warranty or guaranty by Howard W. Sams & Co., Inc., 

as to the quality and suitability of such replacement part. The numbers of these 

parts have been compiled from information furnished to Howard W. Sams & Co., 

Inc., by the manufacturers of the particular type of replacement part listed." 

"Reproduction or use, without express permission, of editorial or pictorial content, 

in any manner, is prohibited. No patent liability is assumed with respect to 

the use of the information contained herein. Copyright 1952 by Howard W. 

Sams & Co., Inc., Indianapolis 5, Indiana, U. S. of America. Copyright under International 

Copyright Union. All rights reserved under Inter-American Copyright 

Union (1910) by Howard W. Sams & Co., Inc." Printed in U. S. of America 

DATE 1-52 SET 157 FOLDER 8

CHANNEL SELECTION SWITCH 

SHOWN IN CHANNEL 2 POSITION 

THE COOPERATION OF THE MANUFACTURER OF THIS 

RECEIVER MAKES IT POSSIBLE TO BRING YOU THIS SERVICE 

© 

LV RECT 

5U4G 

o I6ji_ • 

0 RED-CRN 

BLUE YEL 

O 6.3 VAC 

O BLUE 

-U 

&v_y 

3 70 VAC 

TV-PHONO TONE 

IN TV. MIN. HIGH 

SWITCH SEQI 

I - TV MIN. NIC 

2-TV NORMA 

3-TV MIN.LO 

A- PHONO Mil 

5- PHONO NO 

6- PHONO Mil 

GRN 

0 

O 6.3 VAC 

O 

V ^j 

CRN-RED 

BUN 

A MEASURED WITH 

• MEASURED FROM 

O 1 1 6.3WC 3Ecr ( 

#Ft 

A PHOTOFACT STANDARD NOTATION SCHEMATIC 

©Howard W. Sams & Co., Inc. 1952 

PAGE 2

4TH VIDEO IF 

©6CB6 

HORIZ SYNC AMP 

i;)6SN7GT 

(ran) j @® VERT SfflC AMP ©6SN7GT 

VW-K 4-WV-l 

VERT. HOLD . 

CONTROL 

(fHlJ 

EG 

HEIGHT 

CONTROL 

PHONO TONE SWITCH SHOWN 

TV, WIN. HIGHS POSITION 

SWITCH SEQUENCE 

I- TV MIN. HIGHS 

Z-TV NORMAL. 

5- TV MIN. LOWS 

4- PHONO MIN. HIGHS 

5- PHONO NORMAL 

5- PHONO MIN.LOWS 

0v HORIZ OUTPUT 

PiP ©6CD6G 

SURED WITH VTVM 

SUREO FROM 130 VOLT LINE

MODELS 2TT176, 21T177, 21T178, 21T179

CHASSIS TOP VIEW 

PAGE 3

PAGE 4 

CHASSIS BOTTOM VIEW-CAPACITOR

OR AND ALIGNMENT IDENTIFICATION 

PAGE 9

3 s 

§ 

TOP VIEW 

TUBE PLACEMENT CHART 

PAGE 5

ALIGNMENT INSTRUCTIONS 

1. 

2. 

3. 

4. 

5. 

6. 

1. 

8. 

9. 

DUMMY 

ANTENNA 

Direct 

.005MFI 

Direct 

ALIGNMENT INSTRUCTIONS—READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT 

The high voltage shock hazard may be eliminated by removing the horizontal oscillator tube, (V18), from its socket. 

VIDEO IF ALIGNMENT 

Connect the ends of a IOOOS1 potentiometer across a 7.5 Volt battery capable of withstanding considerable current drain. Connect the positive end 

of the battery to chassis. Connect the center arm of the potentiometer to the junction of R95 & R96. 

Connect the synchronized sweep voltage from the signal generator to the horizontal input of the oscilloscope for horizontal deflection. 

SIGNAL 

GENERATOR 

COUPtING 

High side to terminarA 

of L24. Low side to 

chassis. 

•• 

High side to pin 1 (grid) 

of 6AU6, (V3). Low 

side to chassis. 

High side to point F . 

Low side to chassis. 

SIGNAL 

GENERATOR 

FREQUENCY 

Not Used 

" 

" 

" 

" 

44MC 

(10MC Swp) 

MARKER 

GENERATOR 

FREQUENCY 

39. 75MC 

41.25MC 

47.25MC 

43.7MC 

45. SMC 

41. BMC 

42.15MC 

45MC 

45.75MC 

46. SMC 

42.25MC 

M.5MC 

42.25MC 

45MC 

45.75MC 

CHANNEL 

4 

" 

Any 

channel 

which cau 

ses no 

interference. 

SOUND IF ALIGNMENT 

CONNECT 

SCOPE 

Use VTVM 

DC probe to pqint. 

Common to chassis. 

" 

" 

Vert. Amp. to point 

C^ Low side to chas- 

•sis. 

Vert. Amp. thru detector 

probe, (fig. 2) 

to pin 5 oteAUB (V3). 



^^ Low side to chassis. 

Connect the oscilloscope across the speaker voice coil to use as an output indicator. 

Turn the trimmer A16 for minimum capacity. 

DUMMY 

SIGNAL 

SIGNAL 

CONNECT 

GENERATOR GENERATOR CHANNEL 

ADJUST 

ANTENNA 

VTVM 

COUPLING 

FREQUENCY 

. 005MFD 

High side to pin 1 (grid) 

of 6AU6, (V10). Low 

side to chassis. 

4. SMC 

(4001. AM 

mod) 

Any 

DC probe to point. 


A14 

A15 

ADJUST 

Al 

A2 

A3 

A4 

A5 

A6 

A7,A8 

A9.A10 

REMARKS 

Set bias pot. to -IVolt. Adjust for MINIMUM 

deflection. Attenuate signal gen. to maintain 

-IVolt reading. 

Adjust for maximum deflection. Attenuate 

signal gen. to maintain 1 volt reading. 

Connect 330ft resistor across R37, R38 and 

terminals 'A* and 'F'of M6. Adjust for response 

curve similar to fig. I. Attenuate 

sweep gen. to maintain . 5 volt peak to peak 

response. 

Leave 330S2 resistors connected. Connect a 

180fi resistorbetween pin 5 of V3 and junction 

ot R29 and C40. Adjust lor response similar 

to fig. 3. 

Remove all damping resistors. Set IF bias 

to -6 volts. Check for response curve similar 

to fig. 4. If necessary retouch A4 and A5 for 

proper response. Retouch A6 only if absolutely 

necessary. Incorrect adjustment of A6 will 

interfere with trap action. 

REMARKS 

Adjust for maximum deflection on VTVM. Adjust signal 

gen. to obtain 10 volt reading. 

Adjust for MINIMUM 400ft. indication on scope. Repeal 

steps 10 and 11. 

F IG 

FIG 

DC probe to pcint. 


A16 

Check the voltage at polnt. If the voltage exceeds t 

1. 5 volts, adjust A16 for zero voltage on VTVM between 

positive and negative peaks. Repeat adjustment of A15 

and A16 until VTVM reads less than -1.5 volts with 

A15 adjusted for MINIMUM 4001. indication on scope. 

14. See Fig. 6 

High side to point A . 


4. SMC 

(IMC Swp) 

USE SCOPE 

Vert. Amp. thru 10KSJ 

to poinKQ>. Low side 

to chassis. 

A17.A18 

A19 

ANTENNA MATCHING UNIT ALIGNMENT 

Adjust for maximum amplitude and symmetry as per 

Fig. 5. 

This unit has been properly aligned at the factory and is very stable. Alignment should not be attempted unless it has been definitely established 

that it is out of alignment and proper equipment is available to align it. The required equipment consists of a sweep generator capable of at least 

1 volt output, and an oscilloscope with a sensitivity of at least .02 Volts per inch. Misalignment of this unit can cause serious attenuation of the 

signal especially on channel 2. Adjustment of the FM trap, (A43), however will not effect the alignment. 

In the event of replacement of the antenna matching unit, the entire tuner should be realigned. - 

Disconnect the FM trap, L8, from the channel selector switch. The free end of L8 is alignment Point

JCTIONS 

ORE ATTEMPTING ALIGNMENT 

tl oscillator tube, (V18), from its socket. 

of withstanding considerable current drain. Connect the positive end 

junction of R95 & R96. 

zontal input of the oscilloscope for horizontal deflection. 

•JNECT 

:OPE 

'M 

e to pqinKg>. 

to chassis. 

' 

' 

ADJUST 

Al 

A2 

A3 

A4 

REMARKS 

Set bias pot. to -IVoIt, Adjust for MINIMUM 

deflection. Attenuate signal gen. to maintain 

-IVolt reading. 

Adjust for maximum deflection. Attenuate 

signal gen. to maintain 1 volt reading. 

F IG.4 

11, 

18. 

ALIGNMENT IN 

If the tuner is operating and requires only touch up alignment the 

completely realigned pre-set all adjustments to the approximate 

Pre-set A26 so the screw head is approximately 3/8 inch above t 

Do not change any adjustments on the antenna matching unit. 

Disconnect the coax link from terminal" A" of L24. Connect a 39S2 

Connect a clip lead from the tuner AGC terminal, (terminal 3) to 

During step 17 the signal generator is connected to the RF Amp. 

and the tube replaced in its socket. Connect the generator to the 

Set the fine tuning control 30 degrees clockwise from the mechan 

Connect the synchronized sweep voltage from the signal generat 

DUMMY 

ANTENNA 

1500MMF 

See fig.e 

SIGNAL 

GENERATOR 

COUPLING 

High side to pin 7, (grid) 

of 6BQ7, (VI). Low side 

to chassis. 

Across antenna terminal 

SIGNAL 

GENERATOR 

FREQUENCY 

Not used 

Not used 

MARKER 

GENERATOR 

FREQUENCY 

43. SMC 

(4001. mod) 

227MC 

unmod) 

CHAN 

2 

8 

A5 

A6 

19. 

183MC 

(10MC Swp) 

181. 25MC 

185.75MC 

up. to point 

side to chas- 

A7,A8 

Connect 330S2 resistor across R37, R38 and 

terminals 'A1" and V'of M6. Adjust for response 

curve similar to fig. I. Attenuate 

sweep gen. to maintain . 5 volt peak to peak 

response. 

20. 

Not used 

129MC 

6 

np. thru de- 

-obe, (fig. 2) 

of6AU6 (V3). 

; to chassis. 

ASaAlO 

Leave 330J3 resistors connected. Connect a 

180n resistorbetween pin 5 of V3 and junction 

of R29 and C40. Adjust for response similar 

to fig. 3. 

FIG.5 

21. 

22. 

" 

" 

8 SMC 

(10MC Swp) 

Not used 

83.25MC 

87, 75MC 

Not used 

up. to point 

side to chas- 

Remove all damping resistors. Set IF bias 

to -6 volts. Check for response curve similar 

to fig. 4. If necessary retouch A4 and A5 for 

proper response. Retouch A6 only if absolutely 

necessary. Incorrect adjustment of A6 will 

interfere with trap action. 

23. 

24. 

" 

Repeat step 18. 

" 

85MC 

(10MC Swp) 

83.25MC 

87. 75MC 

ator. 

25. 

Repeat step 19. 

ADJUST 

A14 

REMARKS 

Adjust for maximum deflection on VTVM. Adjust signal 

gen. to obtain 10 volt reading. 

2*. Repeat step 23, If necessary repeat steps 16, 17, and 20 until no fur 

27. see Fig. 8 Across antenna terminal. Not used 257MC 

13 

A15 

A16 

A17.A18 

A19 

Adjust for MINIMUM 4001 indication on scope. Repeat 

steps 10 and 11. 

Check the voltage at poinK^). II the voltage exceeds ± 

1. 5 volts, adjust A16 for zero voltage on VTVM between 

positive and negative peaks. Repeat adjustment of A15 

and A16 until VTVM reads less than 1 1. 5 volts with 

A15 adjusted for MINIMUM 4001 indication on scope. 

Adjust for maximum amplitude and symmetry as per 

Fig. 5. 

lent should not be attempted unless it has been definitely established 

required equipment cons sts of a sweep generator capable of at least 

nch. Misalignment of this unit can cause serious attenuation of the 

will not effect the alignm ;nt, 

mid be realigned, 

of L8 is alignment Poin \Sy, as shown on the schematic. 

mp. thru detrobe 

to 

>, Low side 

A17 

A18 

A19.A20 

Adjust for MINIMUM 400^ indication or scope. 

Adjust for MINIMUM 400% indication or scope. 

Connect a 3000 resistor from Point^to 

chassis. Adjust for response curve similar 

to Fig. 7. A19 controls the placement of the 

shoulder. A20 is adjusted to give maximum 

amplitude of .53MC marker consistant with 

curve shape shown in Fig. 7 . 

Repeat steps 14, 15 & 16 until no further improvement 

can be made. 

300-r 

BALANCED 

L-WV 

FIG.6 

TO 300j 

28. 

29. 

30. 

31. 

33. 

Repeat Step 20 

Repeat Step 19 

See Fig. 6 Across antenna terminal. 

213MC 211.25MC 

(10MC swp.) 215.75MC 

207MC 205.25MC 

(10MC swp.) 209.75MC 

201MC 199.25MC 

(10MC swp.) 203.75MC 

195MC 193.25MC 

{10MC swp.) 197.75MC 

189MC 187.25MC 

(10MC swp.) 191.75MC 

183MC 181.25MC 

(10MC swp.) 185.75MC 

177MC 175.25MC 

(10MC swp.) 179.75MC 

85MC 

(10MC swp.) 

79MC 

(10MC swp.) 

69MC 

(10MC swp.) 

63MC 

(10MC swp.) 

83.25MC 

87.75MC 

77.25MC 

81.75MC 

67.25MC 

71.75MC 

61. 25MC 

S5.75MC 

55.25MC 

59.75MC 

57MC 

(10MC swp.) 

32. See Fig. 6 Across antenna terminal. Not used 257MC 

Remove 39SJ Resistor and reconnect from 

V 251MC 

12 

245MC 

11 

239MC 

10 

233MC 9 

227MC 8 

221MC 

7 

129MC 6 

123MC 5 

113 MC 

4 

107MC 3 

link 

101MC 

tuner. Recheck 

2 

step 

FM TRAP 

If interference from an FM station is encountered adjust the FM 

in the area, they should be checked to make sure the trap is not 

13 

12 

11 

10 

9 

8 

7 

6 

5 

4 

3 

2 

13 

F IG.8 

F IG. 3

n. 

ALIGNMENT INSTRUCTIONS CCONTJ 

RF ALIGNMENT 

If the tuner is operating and requires only touch up alignment the following pre-setting adjustments should not be performed. If the tuner is to be 

completely realigned pre-set all adjustments to the approximate center of their range with tie following exceptions. 

Pre-set A26 so the screw head is approximately 3/8 inch above the chassis. Turn A9 fully counter-clockwise. Set A23 one quarter turn from tight. 

Do not change any adjustments on the antenna matching unit. 

Disconnect the coax link from terminal" A" of L24. Connect a 39fi carbon resistor across the open end of the link. . 

Connect a clip lead from the tuner AGC terminal, (termina 3) to chassis. 

During step 17 the signal generator is connected to the RF Amp. grid by means of a piece of small diameter wire slipped over Pin 7 of the tube, 

and the tube replaced in its socket. Connect the generator to the free end of the wire. 

Set the fine tuning control 30 degrees clockwise from the mechanical center of its range. 

Connect the synchronized sweep voltage from the signal generator to the horizontal input of the oscilloscope for horizontal deflection. 

DUMMY 

ANTENNA 

1500MMF 

SIGNAL 

GENERATOR 

COUPLING 

High side to pin 7, (grid) 

of 6BQ7, (VI). Low side 

to chassis. 

SIGNAL 

GENERATOR 

FREQUENCY 

Not used 

MARKER 

GENERATOR 

FREQUENCY 

43. SMC 

(400% mod) 

CHANNEL 

2 

CONNECT 

SCOPE 


Hem 

V 1 

V 2 

V 3 

V A 

V 5 

V 6 

V 7 

V 8 

V9 

V 10 

VI 1 

V 12 

V 13 

V 14 

V15 

V 16 

V 17 

V 18 

V 1 9 

V20 

V21 

V22 

V23 

V24 

V25 

Tub. 

6BQ7 

8X8 

6AU6 

6CB6 

6CB6 

6CB6 

6AG7 

6CB6 

6AU6 

6AU6 

6AL5 

6AV6 

6AQ5 

6SN7GT 

6SN7GT 

6AQ5 

6SN7GT 

6SN7GT 

6CD6G 

6W4GT 

6W4GT 

1B3GT 

5U4G 

5U4G 

T2Kn 

on 

57KS2 

57Kn 

.3S2 

.sn 

on 

RESISTANCE MEASUREMENTS 

RESISTANCE READINGS 

Pin 1 

290KS2 

470Kn 

47KH 

7.8KB 

lOMee 

• 470KS2 

f26Kn 

,5Meg 

i.SMeg 

3.9Meg 

l.SMeg 

Inf. 

M. 

nf. 

Pin 2 

8.2Meg 

lOOKn 

On 

sen 

esn 

won 

on 

ts.sxn 

on 

on 

8Kn 

on 

>43on 

ti.2Kn 

tl.SMeg 

i.3Kn 

tS.BKn 

tsoKn 

.in 

Inf. 

200Kn 

Pin 3 

8.8Meg 

ji3Kn 

on 

on 

.in 

.in 

on 

uon 

on 

on 

.in 

on 

on 

isoKn 

on 

on 

820n 

218Kn 

won 

200Kn 

200Kn 

on 

.in 

.in 

.in 

on 

on 

Pin 4 

3.9Kn 

i.2n 

.m 

.in 

on 

.in 

.in 

t!75Kn 

tl.SMeg 

.in 

IMeg 

218Kn 

Inf. 

Tnf 

Inf. 

PINS 1 THHOUGH 8 HAVE INF RESISTANCE 

nl. 

Inf. 

ion 

iiKn 

iiKn 

PIN 2 

200Kn 

Inf. 

Inf. 

PIN 10 

#270Kn 

2LAP4 

ALL MEASUREMENTS TAKEN IN TV POSITION 

ALL CONTROLS SET FOR NORMAL OPERATION 

t MEASURED FROM PIN 8 OF V23 81 V24 

• MEASURED FROM 130VDC LINE 

• MEASURED FROM PIN 8 OF V21 

1 MEASURED FROM 135VDC LINE 

• MEASURED FROM PIN 3 OF V20 & V21 

nn 

nn 

PIN 11 

i20Kn 

.in 

Pin 5 

.2n 

tUKn 

t2.3Kn 

t5Kn 

ts.iKn 

43n 

160Kn 

SlKQ 

•iKn 

Inf. 

170Kn 

taaon 

t680Kn 

t250Kn 

ti.2Kn 

tisKn 

T56Kn 

IMeg 

t24on 

t240n 

Inf. 

Inf. 

PIN 12 

u.2n 

Pin 6 

8.7Meg 

on 

134Kn 

t34Kn 

flSKSJ 

tiiKn 

tiiKn 

ti. 3Kn 

.2Kn 

>24Kn 

on 

170Kn 

tsion 

400Kn 

on 

tl.2K!2 

on 

on 

won 

Inf. 

Inf. . 

ien 

Ififl 

Pin 7 

170Kn 

100KS2 

won 

on 

on 

on 

.in 

t3.8Kn 

82n 

esn 

Inf. 

t330K.O 

.470KH 

ion 

on 

3.3Meg 

on 

on 

on 

«.m 

•.in 

Inf 

Inf. 

Pin 8 

ison 

t2.9Kn 

t8Kn 

i.2n 

.in 

.in 

.in 

ti2Kn 

•on 

•on 

iiKn 

iiKn 

on 

Pin 9 

t2.9K!2 

TOP CAP 

«2n 

TOP CAP 

*soon 

DISASSEMBLY INSTRUCTIONS 

1. Remove 8 push on type control knobs. 

2. Remove 3 wood screws from back cover. Remove cover. 

3. Disconnect built-in antenna. 

4. Disconnect speaker. 

5. Remove clip on jewel light. 

6. Disconnect H. V. lead. l 

7. Disconnect picture tube socket. 

8. Disconnect yoke plug from H. V. unit. 

9. Remove 6 chassis bolts. Remove chassis. 

10. Remove speaker mounting nuts. Remove speaker. 

Note: For picture tube removal, it is necessary to remove the chassis as outlined above. 

OSCILLATOR ALIGNMENT POINTS 

PAGE 8

HORIZ. 

INEARITY 

CONTROL 

WIDTH 

HORIZ. 

^FREQ. 

HEIGHT 

CONTROL 

HORIZ. 

DRIVE 

VERT. 

PEAKING 

CONTROL 

,.- 

/ 

VERT. 

LINEARITY 

CONTROL 

VHORIZ. 

HOCK 

CABINET-REAR VIEW 

HORIZONTAL SWEEP CIRCUIT ADJUSTMENTS 

Turn the set on and tune in a TV station, preferably a test pattern. 

If the picture cannot be synchronized with the horizontal hold control, turn the hold control to the center of its range and adjust the horizontal frequency 

slug, (Bl), If adjustment of Bl will not synchronize the picture, turn the waveform slug, (B2), several turns out counter-clockwise and readjust Bl. 

Examine the width and horizontal linearity of the picture . If they are not approximately correct adjust the horizontal drive, width, and linearity as 

outlined under HORIZ. DRIVE, WIDTH, AND LINEARITY ADJUSTMENT. 

Connect the low capacity probe of an oscilloscope to terminal C of L38. 

Adjust the waveform slug, (B2), until the broad and narrow peaks of the waveform on the scope are of equal height as shown in figure 9. If necessary 

during adjustment of B2, readjust Bl to keep the picture synchronized. 

Turn the horizontal hold control to fully counter-clockwise, and momentarily interrupt the signal by switching to another channel and back again. 

If the picture is not out of synchronization turn Bl slightly and repeat the signal interruption until the picture is out of synchronization and shows 

several bars sloping downward to the left. 

Slowly turn the hold control clockwise and carefully note the least number of sloping bars present before the picture pulls into synchronization. 

If more than 3 bars are present adjust the locking range trimmer, (B3), slightly clockwise , if less than 2 bars are present adjust B3 slightly 

counter-clockwise. 

Repeat the check and adjustment of B3 until 2 to 3 bars are present at the pull-in point. 

Turn the horizontal hold control to fully clockwise . 

Adjust Bl until one bar, sloping downward to the right, appears in the picture. Then back off until the bar just moves off the picture leaving 

the picture in synchronization. 

HORIZONTAL DRIVE, WIDTH, AND LINEARITY ADJUSTMENTS 

Pre-set the adjustments as follows. 

Place the width link in the minimum width position, (top). 

Pre-set the width slug, (B6), to approximately mid-position. 

Pre-set the horizontal linearity slug, (B5), near minimum inductance, (counter-clockwise). 

Pre-set the horizontal linearity control near minimum resistance, (clockwise). 

Pre-set the horizontal drive trimmer, (B4), to minimum capacity, (counter-clockwise) 

Turn the set on and tune in a TV station, preferably a test pattern. Allow a few minutes tor set to warm up. 

If the raster is cramped or shows a bright vertical bar in the picture adjust B4 clockwise just enough to remove this condition. 

Adjust B5 clockwise until the picture of best linearity and maximum deflection, or the best compromise, are obtained and then one quarter turn more. 

Retouch B4 if necessary to obtain best results. 

Check the horizontal linearity at various settings of the brightness control. There should be no compression of the right side of the picture, and 

no appreciable change in linearityespecially at the extreme left side of the picture. 

If objectional changes do occur, turn B5 slightly clockwise and repeat the check. 

Adjust the width slug, (B6), until the picture is slightly wider than necessary to fill the mask horizontally. In the event of low line voltage, it may 

be necessary to move the width link to the lower position to obtain proper width. In this position the width coil, (B6) is inoperative. 

If the left side of the picture appears stretched, -adjust the horizontal linearity control counter-clockwise. If the left side of the picture appears cramped 

turn the linearity control clockwise. Whenever possible it is desirable to correct the linearity with the linearity control rather than the drive trimmer(B4). 

ADJUST FOR EQUAL PEAKS 

i 

FIG. 9 

PAGE1O

RF TUNER-TOP VIEW 

RF TUNER-BOTTOM VIEW 

PAGE 11

PAGE 12 

CHASSIS BOTTOM VIEW-RESISTOR

)R AND INDUCTOR IDENTIFICATION 

PAGE 17

WIDTH 

LINK 

HIGH VOLTAGE SUPPLY 

RF TUNER-RIGHT SIDE 

PAGE 18

ITEM 

No. 

VI 

V2 

V3 

V4 

V5 

V6 

V7 

V8 

V9 

V10 

Vll 

V12 

V13 

V14 

V15 

V16 

V17 

V18 

V19 

V20 

V21 

V22 

V23 

V24 

V25 

ITEM 

No. 

USE 

RF Amp. 

Converter 

1st. Video IF Amp. 

2nd. Video IF Amp. 

3rd. Video IF Amp. 

4th. Video IF Amp. 

Video Amp. 

AGC Amp. 

1st. Sound IF Amp. 

2nd. Sound IF Amp. 

Ratio Det. 

AF Amp. 

AF Output 

Sync. Sep. 

Vert. Sync. Amp. 

Vert. Osc. 

Vert. Output 

Horiz. Sync. Amp. 

Horiz. AFC -Horiz. 

Osc. 

Horiz. Output 

Damper 

Damper 

H.V. Reel. 

L.V. Reel. 

L.V. Reel. 

Pic. Tube 


PART No. 

PARTS LIST AND DESCRIPTIONS 

TUBES (SYLVANIA or Equivalent) 

REPLACEMENT DATA 


PART No. 

6BQ7 

6X8 

6AU6 

6CB6 

6CB6 

6CB6 

6AG7 

6CB6 

BAU6 

6AU6 

6AL5 

6AV6 

6AQ5 

6SN7GT 

6SN7GT 

6AQ5 

6SN7GT 

6SN7GT 

6CD6G 

6W4GT 

6W4GT 

1B3GT 

5U4G 

5U4G 

21AP4 


SYLVANIA 

PART No. 

STANDARD 

REPLACEMENT 

6BQ7 

6X8 

6AU6 

6CB6 

6CB6 

6CB6 

6AG7 

6CB6 

6AU6 

6AU6 

6AL5 

6AV6 

6AQ5 

6SN7GT 

6SN7GT 

6AQ5 

6SN6GT 

6SN7GT 

6CD6G 

6W4GT 

6W4GT 

1B3GT 

5U4G 

5U4G 

21AP4 

CATHODE-fl 

THOMAS 

PART No. 

RMA 

BASE 

TYPE 

9AT 

9AK 

7BK 

7CM 

7CM 

7CM 

8Y 

7CM 

7BK 

7BK 

6BT 

7BT 

7BZ 

8BD 

8BD 

7BZ 

8BD 

8BD 

5BT 

4CG 

4CG 

3C 

5T 

5T 

12D 

AY TUBE 

RTMA 

BASE 

TYPE 

NOTES 

NOTES 

V25 

ITEM 

No. 

CIA 

B 

C 

D 

C2A 

B 

C 

D 

C3A 

BC 

D 

C4 

C5 

C6 

C7 

C8 

C9 

CIO 

Cll 

C12 

C13 

C14 

CIS 

C16 

C17 

C18 

C19 

C20 

C21 

C22 

C23 

C24 

C25 

C26 

C27 

C28 

C29 

C30 

C31 

C32 

C33A 

B 

C34 

C35 

C36 

C37 

C38 

C39 

C40 

C41 

C42A 

B 

C43 

C44A 

B 

C45 

C46 

C47 

C48A 

B 

C49 

21AP4 

RATING 

CAP. VOLT 

35 

25 

20 

100 

35 

35 

10 

10 

35 

35 

10 

5 

5 

2 

2 

5 

18 

5 

27 

33 

22 

1500 

1-4 

1500 

1500 

1500 

8 

1500 

1500 

270 

330 

270 

22 

.68 

12 

.8-1.4 

1500 

1500 

1500 

4700 

4700 

4700 

4700 

27 

4700 

4700 

.047 

4700 

4700 

4700 

82 

4700 

4700 

4700 

4700 

4700 

4700 

1500 

4700 

4700 

4700 

10000 

450 

450 

200 

50 

450 

450 

450 

200 

450 

450 

450 

450 

450 

50 

50 

50 

400 

12D 

CAPACITORS 

Capacity values given in the rating column are in mfd. for Electrolytic 

and Paper Capacitors, and in mmfd. for Mica and Ceramic Capacitors. 


HCA AEROVOX CENTRALAB CORNELL- ERIE 

PART No. PART No. PART No. 

DUBILIER 

SPRAGUE 

PART No. 

PART No. PART No. 

76486 

AFH4-82 

UPT433 

76485 

75510 

28417 

73747 

73747 

74521 

54207 

9305L 

72570 

38868 

76557 

74748 

76532 

75166 

73748 

75166 

70597 

73748 

75166 

75199 

76552 

75199 

76558 

71088 

76550 

76545 

75166 

75610 

75610 

73473 

73473 

1 76470 

r 

72570 

73473 

73473 

73553 

73473 

73473 

73473 

71514 

) 76470 

73473 

) 76470 

73473 

75166 

73473 

1 76470 

•^73960 

I-AFH4-16 

LPRS250/4 

AFH4-16 

PRS450/4 

PRS150/4 

PRS150/4 

PRS150/4 

SI5NPO 

SI33 

BPD-0015 

SI1500 

BPD-0015 

SI1500 

BPD-0015 

SI1500 

SI270 

SI330 

SI270 

SI22N080 

SI1500 

SI1500 

SI1500 

BPD-005 

BPD-005 

1 BPD-2X005' 

] 

SI27 

BPD-005 

BPD-005 

P488-047 

BPD-005 

BPD-005 

BPD-005 

JBPD-2X005' 

J 

BPD-005 

1BPD-2X005" 

BPD-005 

SI1500 

BPD-005 

)BPD-2X005"| 

J 

BPD-01 

TCZ-18 

TCZ-4.7 

TCZ-27 

D6-330 

TCZ-22 

DD-152 

829-4 

D6-152 

DD-152 

D6-152 

DD-152 

D6-152 

D6-271 

D6-331 

D6-271 

TCZ-.68 

829-3 

D6-152 

D6-152 

D6-152 

DD-502 

DD-502 

DD-2-502 

D6-270 

DD-502 

DD-502 

DF-503 

DD-502 

DD-502 

DD-502 

TCN-82 

DD-2-502 

DD-502 

DD-2-502 

DD-502 

D6-152 

DD-502 

DD-2-502 

DD-103 

UPT434 

UPT420 

BR445 

BBR2-50 

BBH2-50 

BR550 

1D5D5 

1D5D5 

1D5D5 

JD5D5 

1D5D5 

1D5D5 

PTE4S5 

1D5D5 

1D5D5 

1D5D5 

1D5D5 

1D5D5 

1D5D5 

1D5D5 

1D5D5 

UJ5D5 

1W5D15 

1D5D5 

"1D5D5 

1D5D5 

"1D3S1 

NPOK-180 

NPOK-050 

NPOK-270 

GP1K-330 

NPOK-220 

801-0015 

GP2L-152 

801-0015 

GP2L-152 

NPOK-080 

801-0015 

GP2L-152 

GP2K-271 

GP2K-331 

GP2K-271 

N080-331-220 

NPOK-R68 

N080-331-120 

GP2L-152 

GP2L-152 

GP2L-152 

811-005 

811-005 

811-005 

811-005 

GP1K-270 

811-005 

811-005 

811-005 

611-005 

811-005 

N750L-820 

811-005 

811-005 

811-005 

811-005 

811-005 

811-005 

GP2L-152 

811-005 

811-005 

811-005 

821-01 

rTVL-3785 

l-TVA-1504 

rTVL-3785 

LTVA-1702 

TVA-1702 

TVA-1301 

TVA-1301 

TVA-I303 

5GA-Q33 

5HK-D15 

501C1 

5HK-D15 

501C1 

5HK-D15 

501C1 

5GA-T27 

5GA-T33 

5GA-T27 

501C1 

501C1 

5HK-D15 

5HK-D47 

5HK-D47 

.5HK-2D4T 

i 

5HK-D47 

5HK-D47 

4TM-S47 

5HK-D47 

5HK-D47 

5HK-D47 

>5HK-2D47 

1 

5HK-D47 

I5HK-2D47 

5HK-D47 

501C1 

5HK-D47 

J5HK-2D47 

J 

5HK-S1 

IDENTIFICATION CODES 

AND 

INSTALLATION NOTES 

.Filter 

•Decoupling 

* Audio Output Cathode 

Vert. Output Cathode 

.Filter 

• Vert. Output Dec. 

* Output Dec. 

Decoupling 

.Filter 

• Filter 

A Decoupling 

Video Amp. Screen 

Vert. Osc. Dec. 

AGC Filter 

AGC Filter 

Stabilizing Cap. 

Fixed Trimmer 

RF Coupling 

Fixed Trimmer 

Fixed Trimmer 

RF Coupling 

AGC Filter 

Variable Trimmer 

RF Amp. Cathode 

RF Bypass 

RF Bypass 

Fixed Trimmer 

RF Amp. Fil. 

RF Bypass 

RF Coupling 

RF Coupling 

RF Coupling 

Osc. Grid. Cap. 

Fixed Trimmer 

Osc. Feedback 


Conv. Fil. 

Fil. Bypass 

RF Bypass 

RF Bypass 

AGC Filter 

RF Bypass 

RF Bypass 

Fixed Trimmer 

AGC Filter 

AGC Filter 

RF Bypass 

1st Video IF Screen 

1st Video IF Fil. 

RF Bypass 

Fixed Trimmer 

2nd Video IF Plate 

2nd Video IF Screen 

2nd Video IF FU. 

3rd Video IF Plate 

3rd Video IF Screen 

3rd Video IF Fil. 

4th Video IF Plate 

4th Video IF Screen 

4th Video IF Cathode 

4th Video IF Fil. 

RF Bypass 

o 

m 

to 

N 

Ch 

-S 

M > 

N 

10 

3 

N 

00 

to 

3 

PAGE 13

i} 

ITEM 

No. 

C50 

C51 

C52 

C53 

C54 

C55 

C56 

C57 

C58 

C59 

C60 

C61 

C62 

C63A 

B 

C64 

C65 

C66A 

B 

C67 

C68 

C69 

C70 

C7I 

C72 

C73 

C74 

C75 

C76 

C77 

C78 

C79 

C80 

C81 

C82 

083 

C84 

C85 

C86 

C87 

C88 

C89 

C90 

C91 

C92 

C93 

C94 

C95 

C96 

C97 

C98 

C99 

C100 

C101 

C102 

C103 

C104 

C105 

C106 

C107 

C108 

C109 

C1IO 

cm 

C112 

C113 

C114 

C115 

cue 

C117 

C118 

C119 

C120 

C121 

C122 

C123 

C124 

C125 

RATING 

CAP. VOLT 

.0041 

47 

15 

3 

.22 

10000 

10000 

100 

39 

10000 

.1 

.0047 

10000 

10000 

10000 

10000 

56 

10000 

10000 

10000 

470 

470 

1-4 

330 

.0022 

.0047 

.015 

.0082 

.01 

.0027 

270 

.01 

.0047 

.022 

.01 

.001 

.001 

100 

.01 

.0022 

.0047 

.01 

.047 

.22 

.0022 

.022 

.022 

.1 

.1 

.022 

.001 

100 

82 

150 

.47 

.022 

.047 

.047 

82 

270 

.01 

.0015 

.001 

.047 

.47 

33 

.068 

.068 

.47 

180 

150 

500 

.01 

270 

.047 

.047 

1500 

150 

600 

400 

500 

400 

600 

500 

500 

500 

600 

600 

200 

600 

400 

600 

400 

600 

400 

400 

600 

600 

400 

600 

600 

600 

600 

600 

000 

400 

400 

600 

400 

600 

600 

000 

!00 

100 

100 

600 

500 

500 

600 

600 

1000 

600 

200 

1000 

1000 

200 

30000 

400 

500 

400 

400 


PART No. 

73920 

39042 

39044 

76507 

73794 

73960 

73960 

76578 

76574 

73960 

73551 

73920 

73960 

.75877 

73960 

71924 

; 75877 

73960 

39644 

39644 

76532 

76473 

73595 

73920 

73797 

73808 

73561 

73599 

47617 

73561 

73920 

73562 

73561 

75643 

75643 

45233 

73561 

73595 

73920 

73594 

73592 

74957 

73803 

73562 

73563 

73557 

73551 

73798 

75643 

45233 

73090 

44202 

73787 

73562 

73553 

73592 

73090 

76579 

73594 

76508 

73801 

73592 

73787 

76577 

73815 

73815 

73787 

76575 

76578 

76488 

73561 

76579 

75071 

75071 

73748 

AEROVOX 

PART No. 

P688-0047 

SI47N750 

S13NPO 

P488-22 

BPD-01 

BPD-01 

1468-0001 

CAPACITORS CCONT.J 


BPD-01 DD-103 

P488-1 DF-104 

P688-0047 D6-472 

BPD-01 DD-103 

BPD-01 1 DD-3-103 

BPD-01 _J 

BPD-01 DD-103 

TbPD-01 

^BPD-01 

BPD-01 

1468-0005 

1468-0005 

1468-00035 

P688-0022 

P6B8-0047 

P288-015 

P488-01 

P688-003 

SI270 

P488-01 

P688-0047 

P488-022 

P488-01 

P688-001 

P688-001 

SHOO 

P488-01 

P688-0022 

P688-0047 

P688-01 

P688-047 

684-25 

P1088-0022 

P488-022 

P488-022 

P688-1 

P488-1 

P688-022 

P688-001 

SHOO 

SI150 

P288-47 

P488-022 

P488-047 

P688-047 

1469-0003 

P688-01 

P688-0015 

P1088-001 

P688-047 

P288-47 

P1088-068 

P1088-068 

P288-47 

P488-01 

1468-0003 

P488-047 

P488-047 

BPD-0015 

SI150 

CENTRALAB 

PART No. 

D6-472 

TCN-47 

TCN-15 

DD-103 

DD-103 

D6-101 

TCN-56 

DD-103 

DD-103 

DD-103 

D6-471 

D6-471 

829-4 

D6-331 

D6-222 

D6-472 

D6-103 

D6-272 

D6-271 

D6-103 

D6-472 

DF-203 

D6-103 

D6-102 

D6-102 

D6-101 

D6-103 

D6-222 

D6-472 

D6-103 

DF-503 

DF-203 

DF-203 

DF-104 

DF-104 

DF-203 

D6-102 

D6-101 

D6-151 

DF-203 

DF-503 

DF-503 

)6-103 

J6-152 

)F-503 

TV1-503 

D6-103 

D6-271 

DF-503 

DF-503 

DD-152 

D6-151 

CORNELL- 

DUBILIER 

PART No. 

PTE6D5 

GT4P2 

1D3S1 

1D3S1 

5W5T1 

1D3S1 

PTE4P1 

PTE6D5 

1D3S1 

1D3S1 

1D3S1 

D3S1 

1D3S1 

1D3S1 

1D3S1 

5W5T5 

5W5T5 

PTE6D2 

PTE6D5 

PTE6S15 

PTE4S1 

PTE6D3 

5W5T3 

PTE4S1 

PTE6D5 

PTE4S2 

PTE4S1 

PTE6D1 

PTE6D1 

5W5T1 

PTE4S1 

PTE6D2 

PTE6D5 

PTE6S1 

PTE6S5 

GP6P25 

PTE16D2 

PTE4S2 

PTE4S2 

PTE6P1 

PTE4PI 

PTE6S2 

PTE6D1 

5W5T1 

5W5T15 

GT2P5 

PTE4S2 

PTE4S5 

PTE6S5 

5R5T3 

PTE6S1 

PTE6S5 

3T2P5 

3T2P5 

PTE4S1 

5W5T3 

PTE4S5 

'TE4S5 

1W5D15 

5W5T15 

* Not used in all models. 

t Some models use 0033MFD t i this application (Part No. 73795). 

tSome models use 082 MFD ii this application (Part No. 76683). 

ITEM 

No. 

Rl 

R2A 

B 

R3A 

B 

C 

R4A 

B 

R5A 

B 

R6A 

R7A 

B 

R8 

RESIST- 

ANCE 

l.SMeg 

I5KB 

200K 

RATING 

IMeg 

50KB 

'Shaft end 

500KB 

Shaft 

1500B 

Shaft 

2.5Meg 

Shaft 

10KB 

Shaft 

500B 

WATTS 

i i 

2 

2 

i -, 

i T. 

J 

i ~> 

~j 

2 


PART No. 

\ "Y 


IRC 

PART No. 

76171 

76445 

76444 

/ "Concentrikit 

Bll-137 » 

76443 •{ Bll-123 * 

E-187 * 

76447 t "511-123 

Not Req. 

76449 J Qll-119 

Not Req. 

76448 J Q19-139X 

\7 Not Req. / 

Qll-116 

I Not Req. 

76496 W-500 

* Additional parts to be used with Concentrikit. 

Note 1 : Tone switch attached to front of volume control. 

CONTROLS 

CLAROSTAT 

PART No. 

AM-44-S 

FKS-1/4 

AM-32-S 

FKS-1/4 

AG-84-S 

FKS-1/4 

AG-27-S 

FKS-1/4 

43-500 

ERIE 

PART No. 

GP2-333-472 

N750K-470 

N750K-150 

NPOK-030 

821-01 

821-01 

GP1K-01 

821-01 

CENTRALAB 

PART No. 

SBB-588 

AN- 31 

AK-1 

AN-22 

AK-1 

B-83 

AK-1 

B-14 

Not Req. 

VK-127 

GP2-333-472 

821-01 

821-01 

821-01 

821-01 

N750K-560 

821-01 

821-01 

821-01 

GP2K-471 

GP2K-471 

532-08-OR5 

GP2K-331 

GP2-333-222 

GP2-333-472 

GP2-333-I03 

GP2-333-272 

GP2K-271 

GP2-333-103 

GP2-333-472 

GP2-333-103 

GP2L-102 

GP2L-102 

GP1K-101 

GP2-333-103 

GP2-333-222 

GP2-333-472 

GP2-333-103 

GP2L-102 

GPLK-101 

GP2K-151 

GP2-333-103 ' 

GP2L-152 

3P2-333-103 

GP2K-271 

801-0015 

3P2K-15I 

SPRAGUE 

PART No. 

6TM-S47 

5TCU-Q47 

5TCU-Q15 

4TM-P22 

5HK-S1 

5HK-S1 

1FM-31 

5HK-S1 

4TM-P1 

6TM-D47 

5HK-S1 

5HK-S1 

5HK-S1 

5HK-S1 

5HK-S1 

5HK-S1 

5HK-S1 

1FM-35 

1FM-35 

1FM-335 

6TM-D22 

6TM-D47 

6TM-S15 

4TM-S1 

6TM-D3 

5GA-T27 

4TM-S1 

6TM-D47 

4TM-S22 

4TM-S1 

6TM-D1 

6TM-D1 

5GA-T1 

4TM-S1 

6TM-D22 

6TM-D47 

6TM-S1 

6TM-S47 

6TM-P25 

MB-D22 

4TM-S22 

4TM-S22 

6TM-P1 

4TM-P1 

6TM-S22 

6TM-DI 

5GA-T1 

5GA-T15 

2TM-P47 

4TM-S22 

4TM-S47 

6TM-S47 

MS-33 

6TM-S1 

6TM-D15 

6TM-S47 

2TM-P47 

2TM-P47 

4TM-S1 

MS-33 

4TM-S47 

4TM-S47 

5HK-D15 

5GA-T15 



AND 


Video Amp. Cathode 

Contrast Cont. Shunt 



Video Coupling 

AGC Filter 

AGC Filter 

Voltage Divider 

Horiz. Feedback 

AGC Cathode 

AGC Filter 

AGC Filter 

Sound IF Grid Filter 

1st Sound IF plate 

1st Sound IF Screen 

1st Sound IF Cathode 

2nd Sound IF Grid 

2nd Sound IF Plate 

2nd Sound IF Screen 

2nd Sound IF Cathode 

Diode Load Cap. 




De-emphasis 

Audio Coupling 

Tone Comp. 

Tone Comp. 


Tone Comp. 

Tone Comp. 


Audio Output Plate t 

Sync.. Sep. Cathode 

Sync. Sep. Cathode 

Vert. Sync. Coupling 

Vert. Feedback 

Vert. Sync. Amp. Plate 


Vert. Integrator Net. 


Vert. Osc. Grid Cap. 

Vert. Discharge 

Vert. Sweep Coupling 

Vert. Output Plate 


Fixed Trimmer 

Fixed Trimmer 


Integrator Net. 

Horiz. Sync- Coupling 

Horiz. Sync. Coupling 


Horiz. Sync. Amp. Cathode 

AFC Filter 

AFC Filter 

AFC Filter 

AFC Plate 


Horiz. Osc. Grid Cap. 

Fixed Trimmer 

Horiz. Discharge 

Horiz. Sweep Coupling 

Horiz. Output Screen 

Horiz. Output Cathode 

Fixed Trimmer 

Damper Filter f 

Damper Filter 

Damper Filter 

Fixed Padder 

Damper Fil. 

HV Filter 

Accelerating Anode Dec. 


Line Filter 

Line Filter 

Horiz. Output Fil. * 

Vert. Sync. Feedback 

Volume Control & Switch- See Note 1 

Contrast Control Tapped @ 5Kft_a!id 10KS2 

Brightness Control. 

Vertical Hold Control - Panel 

Horizontal Hold Control - Rear 

Attach per instructions in "Concentrikit". 

AGC Control 

Attach to R4A per instructions 

Vertical Linearity Control 


Height Control 


Vertical Peaking Control 


Horizontal Linearity Control 

• 

ITEM 

No. 

R9 

RIO 

Rll 

R12 

R13 

R14 

R15 

R16 

R17 

R18 

R19 

R20 

R21 

R22 

R23 

R24 

R25 

R26 

R27 

R28 

R29 

R30 

R31 

R32 

R33 

R34 

R35 

R36 

R37 

R38 

R39 

R40 

R41 

R42 

R43 

R44 

R45 

R46 

R47 

R48 

R49 

R50 

R51 

R52 

R53 

R54 

R55 

R56 

R57 

R58 

R59 

R60 

R61 

R62 

R63 

R64 

R65 

R66 

R67 

R68 

R69 

R70 

R71 

R72 

R73 

R74 

R75 

R76 

R77 

R78 

R79 

R80 

R81 

R82 

R83 

R84 

R85 

R86 

R87 

R88 

PARTS LIST AND 

RATING 

RESISTANCE 

3300B 

3300B 

150B 20% 

47B 

82B 

470KB 20% 

1000B 20% 

1000B 20% 

IOOKB 20% 

100KS2 20% 

3300!! 

100KB 20% 

10KB 20% 

3.3Meg 5% 

10KB 

220KB 5% 

100B 20% 

100B 20% 

1000B 

68000 

IOOB 5% 

33KB 

IOOOQ 

IOOOB 

56B 5% 

33KB 

IOOOB 

100KB 

56KB 

10KB 

150KB 

47KB 

120KB 

8v2Meg 

68B 5% 

10KB 

2200B 

68ooa 5% 

56KB 5% 

180(2 

39KB 

6800B 

8200B 

10KB 

1000B 

3900B 5% 

43B 5% 

6750B 

680!! 

5600B 

10KB 

150KB 

470KB 

1000B 

150KB 20% 

100KB 

470KB 20% 

82 ft 5% 

OOOB 20% 

IOOOB 20% 

47KB 

68B 5% 

33KB 

ooon 20% 

56KB 

47B 5% 

39KB 

200B 5% 

OOOB 5% 

6800B 5% 

S800B 5% 

8KB 

2KB 

27KB 

OMeg 20% 

330KB 

470KB 20% 

000 

330B 

470Q 

R89 

R90 

R91 

R92 

H93 

R94 

R95 

R96 

R97 

R98 

R99 

R100 

RI01 

R102 

R103 

R104 

R105 

R106 

R107 

R108 

R109 

R110 

Rill 

R112 

R113 

R114 

150KB 

100KB 

33KB 

220KB 

1200B 

IMeg 

12KB 

3.9Meg 

820B 

18KB 

150KB 

8.2Meg 

680KB 

470KB 

470KB 

1.5Meg 

220KS! 

22KB 

22KB 

22KB 

B200B 

IMeg 

IMeg 

lOMeg 

320KB 

10KB 

20% 

20% 

5% 

R115 

R116 

R117 

3.3Meg 5% 

OOOB 

S60B 

WATTS 

2 

1 

2 

| 

J 

2 

f 

I 

1 

2 

I 

-'- 

1 

g 

z i 

A 

z 

_1 

1 

1 

2 

2 

2 

l 

| 

l 

10 

i 

1 

1 

A 

I 

i 

1 

1 

i3 

1 

f 

1 

1 I 

I 

1 

| 

I 

I 

i 

i 

z J 

2. 

I 

A 

| 

A 

2 

2 

1 

1 

A 

i 

| 

A 

| 

i 

I 

J 

I 

i 

I 

f 

A 

A 

A 

i 

I 

| 

z 

2 

A 

L 

2 

2 

i 

1 513210 

\T 503156 DAT 


PART No. 

31417 

503310 

502422 

504110 

504110 

503210 

503268 

502110 

503333 

503210 

503210 

502056 

503333 

503210 

503410 

503356 

503310 

503415 

503347 

503412 

503582 

34763 

503310 

503222 

14659 

30650 

503118 

503339 

513268 

503282 

523310 

503210 

30694 

502043 

76642 

503168 

513256 

513310 

503415 

503447 

503210 

504415 

513410 

504447 

13961 

504210 

504210 

503347 

34763 

503333 

504210 

503356 

30732 

503339 

30731 

34766 

4659 

4659 

503318 

503322 

503327 

504610 

503433 

504447 

503110 

76465 

76467 

503415 

503410 

503333 

503422 

503212 

504510 

513312 

503539 

503182 

503318 

503415 

503582 

503468 

503447 

503447 

503515 

503422 

503322 

503322 

503322 

503282 

504510 

502510 

503610 

503482 

503310 

502533 

L 

IR 

PART 

BTA-3. 

BTS-IO: 

BTS-22 

BTS-lOt 

BTS-101 

BTS-10( 

BTS-68' 

BTS-101 

BTS-33 

BTS-lOt 

BTS-KM 

BTS-33 

BTS-101 

BTS-lOt 

BTS-561 

BTS-MN 

BTS-15C 

BTS-471 

BTS-12C 

BTS-8.; 

BTS-10F 

BTS-221 

BTS-681 

BTS-561 

BTS-180 

BTS-391 

BTA-681 

BTS-82( 

BTB-IOI 

BTS-100 

BTS-39{ 

1 3/4A-1 

BTS-68C 

BTA-561 

BTA-101 

BTS-150 

BTS-470 

BTS-100 

BTS-150 

BTA-100 

BTS-470 

BTS-82 

BTS-100 

BTS-100 

BTS-47I- 

BTS-331- 

BTS-lOO 

BTS-56F 

BTS-39B 

BTS-1201 

BTS-1001 

BTS-680 

BTS-680 

BTS-18K 

BTS-22K 

BTS-27K 

BTS-10M 

BTS-330 

BTS-470 

BTS-100 

BTA-330 

BTA-470 

BTS-150 

BTS-100 

BTS-33* 

BTS-220 

BTS-120 

BTS-lM 

BTA-12I 

BTS-3.9 

BTS-820 

BTS-18K 

BTS-150 

BTS-8. 2 

BTS-680 

BTS-470 

BTS-470 

BTS-1.5 

BTS-220 

BTS-22K 

BTS-22K 

BTS-22K 

BTS-820 

BTS-lM 

BTS-lMc 

BTS-10M 

BTS-820 

BTS-10K 

BTS-3.3 

BTA-100 

BTS-560 

PAGE 14

SPRAGUE 

PART No. 

6TM-S47 

5TCU-Q47 

5TCU-Q15 

4TM-P22 

5HK-S1 

5HK-S1 

1FM-31 

5HK-S1 

4TM-P1 

6TM-D47 

5HK-S1 

5HK-S1 

5HK-S1 

5HK-S1 

5HK-S1 

5HK-S1 

5HK-S1 

1FM-35 

1FM-35 

1FM-335 

6TM-D22 

6TM-D47 

6TM-S15 

4TM-S1 

6TM-D3 

5GA-T27 

4TM-S1 

6TM-D47 

4TM-S22 

4TM-S1 

6TM-D1 

6TM-D1 

5GA-T1 

4TM-S1 

6TM-D22 

6TM-D47 

6TM-S1 

6TM-S47 

6TM-P25 

MB-D22 

4TM-S22 

4TM-S22 

6TM-P1 

4TM-P1 

6TM-S22 

6TM-D1 

5GA-T1 

5GA-T15 

2TM-P47 

4TM-S22 

4TM-S47 

6TM-S47 

MS-33 

6TM-S1 

6TM-D15 

6TM-S47 

2TM-P47 

2TM-P47 

4TM-S1 

MS-33 

4TM-S47 

4TM-S47 

5HK-D15 

5GA-T15 

NSTALLATION NOTES 


AND 


Video Amp. Cathode 




Video Coupling 

AGC Filter 

AGC Filter 



AGC Cathode 

AGC Filter 

AGC Filler 

Sound IF Grid Filter 

1st Sound IF plate 

1st Sound IF Screen 

1st Sound IF Cathode 

2nd Sound IF Grid 

2nd Sound IF Plate 

2nd Sound IF Screen 

2nd Sound IF Cathode 





De-emphasis 


Tone Comp. 

Tone Comp. 


Tone Comp. 

Tone Comp. 


Audio Output Plate t 




Vert. Feedback 

Vert. Sync. Amp. Plate 




Vert. Osc. Grid Cap. 

Vert. Discharge 




Fixed Trimmer 

Fixed Trimmer 


Integrator Net. 




Horiz. Sync. Amp. Cathode 

AFC Filter 

AFC Filter 

AFC Filter 

AFC Plate 


Horiz. Osc. Grid Cap. 

Fixed Trimmer 

Horiz. Discharge 

Horiz. Sweep Coupling 

Horiz. Output Screen 

Horiz. Output Cathode 

Fixed Trimmer 

Damper Filter f 

Damper Filter 

Damper Filter 

Fixed Padder 

Damper Fil. 

HV Filter 

Accelerating Anode Dec. 


Line Filter 

Line Filter 

Horiz. Output Fil. * 

Vert. Sync. Feedback * 

ne Control & Switch- See Note 1 

•ast Control Tapped Q 5KS7 an 

itness Control. 

cal Hold Control - Panel 

ontal Hold Control - Rear 

h per instructions in "Concentrikit". 

Control 

h to R4A per instructions 

:al Linearity Control 

i to R5A per instructions 

t Control 


:al Peaking Control 


ontal Linearity Control 

ITEM 

No. 

R9 

RIO 

Rll 

F12 

R13 

R14 

R15 

R16 

R17 

R18 

R19 

R20 

R21 

R22 

R23 

R24 

R25 

R26 

R27 

R28 

R29 

R30 

R31 

R32 

R33 

R34 

R35 

R36 

R37 

R38 

R39 

R40 

R41 

R42 

R43 

R44 

R45 

R46 

R47 

R48 

R49 

R50 

R51 

R52 

R53 

R54 

R55 

R56 

R57 

R58 

R59 

R60 

R61 

R62 

R63 

R64 

R65 

R66 

R67 

R68 

R69 

R70 

R71 

R72 

R73 

R74 

R75 

R76 

R77 

R78 

R79 

R80 

R81 

R82 

R83 

R84 

R85 

R86 

R87 

R88 

PARTS LIST AND DESCRIPTIONS (Continued) 

RESISTORS 

RATING 

RESISTANCE 

3300f! 

3300!! 

150!! 20% 

47!2 

82S2 

470KS? 20% 

1000S2 20% 

1000 S2 20% 

100KS! 20% 

100KS! 20% 

3300f! 

100KS2 20% 

10K!2 20% 

3.3Meg 5% 

10KS! 

220KS2 5% 

10012 20% 

loora 20% 

moon 

6800S7 

loon 5% 

33K!2 

iooo!! 

10000 

sen 5% 

33K!2 

lOOOf! 

100K!2 

56K!2 

10Kf! 

150Kf! 

47KS2 

120K!2 

8i2Meg 

68S2 5% 

10KS2 

22000 

680012 5% 

56Kfi 5% 

ison 

39K!2 

6800S2 

8200S2 

10KS2 

1000 !! 

3900S2 5% 

43!! 5% 

6750!! 

680f! 

5600S2 

10K!2 

150KS2 

470K!! 

1000S2 

50KO 20% 

lOOKi! 

470KS! 20% 

82 a 5% 

ooos2 20% 

100012 20% 

47KS2 

68!! 5% 

33Kf! 

ooon 20% 

56KS! 

47!! 5% 

39KS2 

1200S! 5% 

OOOS2 5% 

6800!! 5% 

6800!! 5% 

8K!2 

22Kf! 

27K!2 

OMeg 20% 

330K!! 

470KQ 20% 

00!! 

330!! 

J70!l 

R89 

R90 

R91 

R92 

R93 

R94 

R95 

R96 

R97 

R98 

R99 

R100 

R101 

R102 

R103 

R104 

ISOKf! 

100K12 

33K!! 

220K!2 

1200S2 

IMeg 

12K!2 

3.9Meg 

820!! 

18K!1 

150K!2 

8.2Meg 

680K!2 

470K!2 

470K!! 

l.SMeg 

20% 

RI05 220K!! 

R106 

R107 

R108 

RI09 

R110 

Rill 

R112 

R113 

R114 

22KS2 

22KS2 

22KS2 

3200!! 

IMeg 

Meg 

lOMeg 

320K!2 

OK!! 

20% 

5% 

R115 3.3Meg 5% 

R116 ooon 

R117 >60!2 

WATTS 

1 

t 

2 

i 

I 

\ 

4 

~ 

I 

1 

| 

Z 

\ 

1 

| ^ 

2 

| 

I 

1 

1 

a 

I 

1 

2 

\F 

i 

\ 

2 

~Z 

J 

| 

i 

2 

\ 

2 

Y 

5 

_i_ 

1 

1 

2 

2 

^i" 

10 

~z 

1 

1 

| 

2 

? 

S. 

1 

| »z 

I 

2 

k 

\ 

i 

j; 

^£ 

\ 

"z 

1 f 

T 

i 9l 

2 I 

1 

1 

~3 

~2 

\ 

1 

i 

t 

i 

1 

1 

\ 

^i 

1 

2 

T i2 

I 

f 

Z 

1 

\ 

1 



PART No. 

31417 

503310 

502422 

504110 

504110 

503210 

503268 

502110 

503333 

503210 

503210 

502056 

503333 

503210 

503410 

503356 

503310 

503415 

503347 

503412 

503582 

34763 

503310 

503222 

14659 

30650 

503118 

503339 

513268 

503282 

523310 

503210 

30694 

502043 

76642 

503168 

513256 

513310 

503415 

503447 

503210 

504415 

513410 

504447 

13961 

504210 

504210 

503347 

34763 

503333 

504210 

503356 

30732 

503339 

30731 

34766 

4659 

4659 

503318 

503322 

503327 

04610 

J03433 

04447 

03110 

6465 

6467 

503415 

503410 

503333 

503422 

503212 

504510 

513312 

503539 

503182 

503318 

503415 

503582 

503468 

503447 

503447 

503515 

503422 

503322 

503322 

503322 

503282 

504510 

502510 

503610 

503482 

503310 

502533 

J13210 

503156 

IRC 

PART No. 

BTA-3.3Meg5% 

BTS-10K 

ETS-220K 5% 

BTS-100 

BTS-100 

BTS-1000 

BTS-6800 

BTS-100 5% 

BTS-33K 

BTS-1000 

BTS-1000 

BTS-33K 

BTS-1000 

DTS-100K 

BTS-56K 

BTS-10K 

BTS-150K 

BTS-47K 

BTS-120K 

BTS-8.2Meg 

BTS-10K 

BTS-2200 

BTS-6800 5% 

BTS-56K 5% 

BTS-180 

BTS-39K 

BTA-6800 

BTS-8200 

BTB-10K 

BTS-1000 

BTS-3900 5% 

1 3/4A-7000 

BTS-680 

BTA-5600 

BTA-10K 

BTS-150K 

BTS-470K 

BTS-1000 

BTS-150K 

BTA-100K 

BTS-470K 

BTS-82 5% 

BTS-1000 

BTS-1000 

BTS-47K 

BTS-33K 

BTS-1000 

BTS-56K 

BTS-39K 

BTS-1200 5% 

BTS-1000 5% 

BTS-6800 5% 

BTS-6800 5% 

BTS-18K 

BTS-22K 

BTS-27K 

BTS-lOMeg 

BTS-330K 

BTS-470K 

BTS-100 

BTA-330 

BTA-470 

BTS-150K 

BTS-100K 

BTS-33K 

BTS-220K 

BTS-1200 

BTS-lMeg 

BTA-12K 

BTS-3.9Meg 

BTS-820 

BTS-18K 

BTS-150K 

BTS-8.2Meg 

BTS-680K 

BTS-470K 

BTS-470K 

BTS-1.5 Meg 

BTS-220K 

BTS-22K 

BTS-22K 

BTS-22K 

BTS-8200 

BTS-lMeg 

BTS-lMeg 5% 

BTS-lOMeg 

BTS-820K 

BTS-10K 

BTS-3.3Meg 5% 

BTA-1000 

BTS-560 


ALL RESISTORS - 10% UNLESS OTHERWISE SPECIFIED 

Antenna Coil Shunt 

AGC Network 

AGC Network 

RF Amplifier Cathode 


RF Amplifier Grid 

RF Amplifier Decoupling 


Isolation 

Mixer Grid 

RF Coil Shunt 

Oscillator Grid 

Oscillator Plate 

AGC Network 

AGC Network 

AGC Network 

Decoupling 

Decoupling 

AGC Network 

IF Coil Shunt 

1st. Video IF Cathode 

1st. Video IF Screen 

1st. video IF Plate 

2nd. Video IF Grid 

2nd. Video IF Cathode 

2nd. Video IF Screen 

2nd. Video IF Plate Decoupling 

Isolation 

AGC Network 

AGC Network 

AGC Network 




3rd . Video IF Cathode 

3rd. Video IF Screen 

3rd. Video IE- Plate Decoupling 

IF Coil Shunt 

IF Coil Shunt 

4th. Video IF Cathode 

4th. Video IF Screen - See Note 1 

4th. Video IF Plate Decoupling 

Voltage Divider - See Note 2 


Isolation 

Video Amplifier Grid 

Video Amplifier Cathode 

Video Amplifier Plate Wire-Wound 

Contrast Network 




Picture Tube Cathode 

Picture Tube Cathode See Note 2 



1st. Sound IF Grid 

1st. Sound IF Cathode 

1st. Sound IF Screen 

1st. Sound IF Decoupling 

2nd. Sound IF Grid 

2nd. Sound IF Cathode 

2nd. Sound IF Screen 

2nd. Sound IF Decoupling 

Bleeder 

Balancing 

De-emphasis 

Balancing 

Balancing 

Ratio Detector Diode Load 


Tone Compensation 

Tone Compensation. 


Audio Amplifier Grid 

Audio Amplifier Plate 

Audio Output Grid 

Audio Output Cathode 

Audio Cntput Cathode Wire-Wound 

Audio Output Decoupling Wire-Wound 

AGC Amplifier Grid 



Horizontal Sync.Seperator Cathode 

Horizontal Sync. Scperato Plate 

Horizontal Sync. Amplifie Grid 

Horizontal Sync. Amplifie Plate 

Horizontal Sync. Amplifie Grid 

Horizontal Sync. Amplifie Cathode 

Isolation 

Isolation 

Sync, generator Cathode See Note 3 

Sync. Seperator Plate 

Sync. Peaking See Note 4 


Vertical Sync. Amplifier Grid 

Vertical Sync. Amplifier Plate 


Integrator Network 



Vertical Osc. Trans. Shunt 

Vertical Osc. Grid 


Vertical Osc. Plate 

Vertical Peaking 

Vertical Output Grid 

Vertical Output Cathode 

Vertical Output Decoupling 

ITEM 

No. 

R118 

R119 

R120 

R121 

R122 

R123 

R124 

R125 

R126 

R127 

R128 

RI29 

R130 

R131 

RI32 

R133 

R134 

R135 

RI36 

R137 

R138 

R139 

R140 

R14I 

R142 

RMS 

R144 

R145 

R146 

R147A 

lOOOMeg 

950S2 

B 450fi 

C 1500!! 

D 1200 f2 

E 10K!1 

F 7K!1 

RATING 

RESISTANCE 

)8K!! 5% 

OK!! 

220KS2 

150K!! 

270K« 

2700!! 

32K1! 

S8KI2 

330K!! 

320K!! 

38K!! 

150K!! 5% 

3900!! 

68Kf! 5% 

8200f! 5% 

18K!1 

56KH 5% 

150Kf! 

390K!i 

390KS! 

47(2 20% 

IMeg 

100!! 

8200« 

8200!! 

82K!2 

200!! 

1.5!2 5% 

WATTS 

1 

a i 

2 

2 

i 

1 

l 

2 

J 

1 

| 

A 

1 

i 

^1 

1 

l 

z 

1 

I 

j 

2 

2 

2 

1 

5 

^2 

R 

PA 

>12368 

J03310 

503422 

503415 

503427 

50322' 

513382 

513368 

50343S 

503482 

513368 

512415 

50323! 

512368 

50228; 

503318 

512356 

503415 

50343! 

50343! 

50404^ 

503510 

523110 

76504 

76504 

513382 

76682 

76468 

76648 

16 "") 

6 / 

5 I 76499 

1 ( 

5 \ J 

Note 1: Some Models may use a 

Note 2: Not used in all Models 



ITEM 

No. 

Tl 

ITEM 

No. 

T2 

T3 

T4 

T5A 

B 

ITEM 

No. 

T6 

PRI. 

117VAC 

®2.7A 

PRI. 

165!2 

300!2 

tapped 

©10f! 

650!! 

30S2 

3.5!2 

RATING 

SEC. 1 SEC. 2 

700VCT 5.0VAC 

.290ADC ©6.0A 

SEC. 4 

6.3VAC 

(5)1. 5A 

RATING 

DC RESISTANCE 

SEC. 

1310!! 

0!! 

.5!! 

d) Drill new mounting holes. 

ITEM 

No. 

SP1 

SP2 

ITEM 

No. 

LI 

IMPEDANCE 

PRI. 

7KS2 

SEC. 

3.4!! 

FIELD RES. 

P.M. 

CONE DIA. 

11 5/8 in. 

TOTAL 

DIRECT 

CURRENT 

.290A 

RATING 


PAR" 

74144 

76501 

76494 

76653 

DC RES. 

PRI. SEC. 

370!! .4!! 

RATINGS 

V. C. IMP. 

3.4f! 

V. C. DIA. 

1 in. 

RATINGS 

D. C. 

RESISTANCE 

39!! 

IN 

10 

.8

SCRIPTIONS (Continued) 

ESISTORS 


ALL RESISTORS - 10% UNLESS OTHERWISE SPECIFIED 

Antenna Coil Shunt 

AGC Network 

AGC Network 



RF Amplifier Grid 


RF Amplifier Decoupling' 

Isolation 

Mixer Grid 

RF Coil Shunt. 

Oscillator Grid 

Oscillator Plate 

AGC Network 

AGC Network 

AGC Network 

Decoupling 

Decoupling 

AGC Network 

IF Coil Shunt 

Is't. Video IF Cathode 

1st. Video IF Screen 

1st. Video IF Plate 

2nd. Video IF Grid 

2nd. Video IF Cathode 

2nd, Video IF Screen 

2nd. Video IF Plate Decoupling 

Isolation 

AGC Network 

AGC Network 

AGC Network 




3rd. Video IF Cathode 

3rd. Video IF Screen 

3rd. Video EC' Plate Decoupling 

IF Coil Shunt 

IF Coil Shunt 

4th. Video IF Cathode 

4th. Video IF Screen - See Note 1 

4th. Video IF Plate Decoupling 

Voltage Divider - See Note 2 


Isolation 

Video Amplifier Grid 

Video Amplifier Cathode 

Video Amplifier Plate Wire-Wound 





Picture Tube Cathode 

Picture Tube Cathode See Note 2 



1st. Sound IF Grid 

1st. Sound IF Cathode 

1st. Sound IF Screen 

1st. Sound IF Decoupling 

2nd. Sound IF Grid 

2nd. Sound IF Cathode 

2nd. Sound IF Screen 

2nd. Sound IF Decoupling 

Bleeder 

Balancing 

De-emphasis 

Balancing 

Balancing 




Tone Compensation. 


Audio Amplifier Grid 

Audio Amplifier Plate 

Audio Output Grid 

Audio Output Cathode 

Audio Output Cathode Wire-Wound 

Audio Output Decoupling Wire-Wound 

AGC Amplifier Grid 



Horizontal Sync .Seperator Cathode 

Horizontal Sync. Seperator Plate 

Horizontal Sync. Amplifier Grid 

Horizontal Sync. Amplifier Plate 

Horizontal Sync. Amplifier Grid 

Horizontal Sync. Amplifier Cathode 

Isolation 

Isolation 

Sync. Seperator Cathode See Note 3 

Sync. Seperator Plate 



Vertical Sync. Amplifier Grid 






Vertical Osc. Trans. Shunt 



Vertical Osc. Plate 

Vertical Peaking 

Vertical Output Grid 

Vertical Output Cathode 

Vertical Output Decoupling 

ITEM 

No. 

R118 

R119 

R120 

R121 

R122 

R123 

R124 

R125 

R126 

R127 

R128 

R129 

R130 

R131 

R132 

R133 

R134 

R135 

R136 

R137 

R138 

R139 

R140 

R141 

R142 

R143 

RI44 

R145 

R146 

R147A 

RATING 

RESISTANCE 

88KB 5% 

OKfl 

220KB 

150KO 

270KB 

2700B 

32KB 

68KB 

330KSJ 

320KO 

58KB 

150KB 5% 

3900 ft 

68KB 5% 

82000 5% 

18KB 

56KO 5% 

150KB 

390KB 

390KB 

470 20% 

IMeg 

1000 

8200 SJ 

82000 

82KB 

200B 

1.5B 5% 

lOOOMeg 

950B 

B 450B 

C 1500B 

D 1200B 

E 10KB 

F 7KO 

WATTS 

1 

a" 

i2^2 

I 

1 

i Ii^l ii 

1 

ifi212 

t 

2 

2 

2 

1 

5 

^2 

n 

u • 

RESISTORS (CONTO 



PART No. 

512368 

503310 

503422 

503415 

503427 

503227 

513382 

513368 

503433 

503482 

513368 

512415 

503239 

512368 

502282 

503318 

512356 

503415 

503439 

503439 

504047 

503510 

523110 

76504 

76504 

513382 

76682 

76468 

76648 

IRC 

PART No. 

BTA-68K 5% 

BTS-10K 

BTS-220K 

BTS-150K 

BTS-270K 

BTS-2700 

BTA-82K 

BTA-68K 

BTS-330K 

BTS-820K 

BTA-68K 

BTA-150K 5% 

BTS-3900 

BTS-68K 5% 

BTS-8200 5% 

BTS-18K 

BTA-56K 5% 

BTS-150K 

BTS-390K 

BTS-390K 

BTS-lMeg 

BTB-8200 

BTB-8200 

BTA-82K 

1 3/4A- 200 

'2D-1000 

76499 J f 1 3/4A-450 

1 3/4A-I500 

1 3/4 A -1200 

1 3/4A-10K 

1 1 3/4A-7K 

Note 1: Some Models may use a 33KS7 Resistor in this application 

Note 2: Not used in all Models 

Note 3: Some Models may use a 5. 6Meg Resistor in this application 

Note 4: Some Models may use a IMeg Resistor in this application 

ITEM 

No. 

Tl 

ITEM 

No. 

T2 

T3 

T4 

T5A 

B 

ITEM 

No. 

T6 

PRI. 

117VAC 

©2.7A 

RATING 

SK. 1 

700VCT 

.290ADC 

DC RESISTANCE 

SEC. 

1310B 

OB 

PRI. 

165B 

300B 

tapped 

©too 

650B 

SOB 

3.5B 

,50 

RATING 

SEC. 2 SEC. 3 

6.3VAC 

©9.5A 

SEC. 5 

6.3VAC 

©2.4A 

5.0VAC 

©6.0A 

SEC. 4 

6.3VAC 

ITEM 

No. 

L2 

L3 

L4 

L5 

L6 

L7 

L8 

L9 

HO 

Lll 

L12 

L13 

L14 

LI 5 

L16 

LI 7 

L18 

L19 

L20 

L21 

L22 

L23 

L24 

L25 

L26 

L27 

L28 

L29 

L30 

LSI 

L32 

L33 

L34 

L35 

L36 

L37 

L38 

L39 

L40 

L41 

L42 

L43 

ITEM 

No. 

Ml 

ITEM 

No. 

M2 

M3 

ITEM 

No. 

r 

use 

Ant. Coll 

Ant. Coll 

IF Trap 

Ant. Shunt 

Ant. Shunt 

IF Trap 

FM Trap 

Ant. Coils 

RF GridCoils 

HF Grid Coil 

RF Plate Coils 

RF Plate Coil 

RF Coupling 

Coil 

Video Trap 

Fil. Choke 

Mixer Grid 

Coils 

Mixer Grid 

Coil 

Osc. Coils 

Fil. Choke 

Fil. Choke 

Fil. Choke 

Conv. Plate 

1st. Video IF 

2nd Video 

IF Primary 

2nd Video 

IF Secondary 

Fil. Choke 

3rd Video IF 

4th Video IF 

Sound Take- 

Ott 

Peaking Coil 

Peaking Coil 

4. SMC Trap 

Peaking Coil 

Peaking Coil 

Sound IF 

Ratio Det. 

Trans. 

Horiz. Osc. 

Anti-Ringing 

Coil 

Anti -Ringing 

Coil 

Anti -Ringing 

Coil 

Width Coil 

Horiz. Lin. 

TYPE 

3AG 

PARTS LIST AND DESCRIPTIONS (Continued) 

PRI. 

.en 

.en 

on on 

on 

on 

on 

on 

on 

on on 

on 

on 

on 

on 

RATING 

1/4A 

BASE TYPE 

Bayonet 

Bayonet 

PART NAME 

on 

on 

on 

on 

on 

on .sn 

.on 

.in 

.in 

on .2n 

,2n 

6.2n 

3. en 

i2n 

sn 

i2n 

7.sn 

s.4n 

4.2n 

7on 

2,sn 

.72n 

.72n 

i2on 

I2n 

DC RES. 

73600 

SEC. 

.en 

.en 

FUSE 

VOLTS 

7.5 

7.5 

.in 

.252 

.2n 

.2n 

3.2n 

.2n 

44n 

M4 RF Tuner 

'5th Video IF 

Resistor 

M5< Capacitor 

Capacitor 

Crystal 

76675 

V, RF Choke 

M6 Switch 

76493 

M7 Focus Magnet 76652 

M8 Ion Trap 

76141 

B3.B4 Trimmer 

52217 

-Knob 

76595 

Knob 

76625 

Knob 

76596 

Knob 

76593 

Knob 

76624 

Knob 

76594 

Knob 

76591 

Knob 

76623 

Knob 

76592 

Knob 

74963 

Knob 

74001 

Knob 

75464 

Knob 

76597 

Knob 

76626 

Knob 76598 


PART No. 

COILS (RF-IF) 



PART No. 

73591 

73591 

76542 

76538 

76537 

76541 

76540 

76554 

76556 

76561 

76553 

76529 

76562 

76535 

73477 

76551 

76560 

76546 

76563 

76564 

76528 

76432 

76434 

76435 

73477 

76433 

76433 

76437 

76646 

76509 

71526 

76647 

76438 

76439 

76440 

76510 

76640 

76640 

76484 

76483 

AMPS. 

.2 

.2 


PART No. 


HOLDER 

BEAD 

COLOR 

White 

White 

MERIT 

PART No. 

TV-151 

TV-185 

TV- 182 

TV-108 

TV-I10 

MWC-2 

FUSES 

FUSE 

318.250 

LITTELFUSE 

PART No. 

DIAL LIGHTS 

me 

PART No. 

CL-1 

CL-1 

CL-1 

HOLDER 



PART No. 

U765 

H765 

MISCELLANEOUS 

NOTES 

"\n 1 

Type No. 51 

Type No. 51 

8MMF lost. Assy. Complete 

10MMF t PT. #76436 

1N60 \) 

Tone lor Phono and TV 

NOTES 

} 

{ 

\a Matching Trans. Complete.Part #7653 

\ 

Complete with Rotor, Coils.and C13 

Complete with Rotor, Coils, C12, R9 and RIO. 

Complete with Rotor, Coils C23 and R16. 

Includes Trimmer . 8-3. 8MMF 

Complete with Rotor, Coils, C21, C22, H17, R18, and R19 

Channel 13 

Complete with Rotor, Coils, C25 and C26 

Includes Trap 

Includes Sound Trap 

Includes Adj. Sound Trap 

Tap at 5n 

72 Microhenries, Orange, Red Dots, Wound on 3.3K Resistor 

500 Microhenries,Green,Orange Dots, Wound on 6. 8K 

Resistor. 

Blue.Yellow Dots, Wound on 47MMF Cap. 

250Mlcrohenries,Green Dot 

ISOMicrohenries, White, Yellow Dots, Wound on 

22K Resistor. 

Tapat .2n 

4. 7Microhenries 

1. 5Microhenries 

1. 5 Microhenries 

Horiz. Drive and Horiz. Lock (Dual) 10-160MMF 

Brightness, Vert, Hold (Maroon) 

Brightness Vert. Hold (Tan) 

Brightness Vert. Hold (Beige) 

Channel Selector (Maroon) 

Channel Selector 

(Tan) 

Channel Selector 

(Beige) 

Fine Tuning 

(Maroon) 

Fine Tuning 

(Tan) 

Fine Tuning 

(Beige) 

Contrast, Horiz. Hold and OFF/ON Volume (Maroon) 

Contrast Horiz. Hold and olf/on Volume (Tan) 

Contrast, Horiz. Hold and off/on Volume (Beige) 

Tone-TV Phono (Maroon) 

Tone-TV Phono (Tan) 

Tone-TV Phono (Beige) 

REMARKS 

NOTES 

PAGE 16

1952 RCA 21T176 - Early Television Foundation

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