Olympic TV-104 User manual

PHOTO FACT* Folder
OLYMPICMODELSTV-1O4,1O5,1O6,
1O7,1O8, 922L, 944,945, 946
HORIZ.
VERT.
HOLD
CONTRAST
BRIGHTNESS
CONTROL
VOLUME
CONTROL
ON-OFF SWITCH
CHANNEL
SELECTOR
OLYMPIC MODEL TV-944
TRADE NAME Olympic Models,TV-104,TV-105,TV-106,TV-107,TV-108,TV-922L (Ser.#£-10,000 to E-16,000
Incl) TV-944,TV-945,TV-946.
MANUFACTURER Olympic Radio and Tel.Corp., 3101-19 38th Ave., Long Island City, New York
TYPE SET Television Receiver
TUBES Twenty-Three
POWER SUPPLY 105-125 Volts, 60 Cycles
TUNING RANGE-Channels 2 through 13
AC
RATING: 1.75 Amps © 117 Volts
Alignment Instructions
Block Diagram
Disassembly Instructions
Horizontal Osc. and Linearity
Adjustments
Parts List and Description
Photographs
Cabinet Rear View
Capacitor Identification
Chassis-Top View
High Voltage Compartment
Resistor Identification
INDEX
Page
8,9,10 Photographs (continued)
23 Tuner (CL-1428)
24 Tuner (CL-1633)
Tuner (CL-1677)
Trans., Inductor and Alignment
Identification
24
18,19,20
Schematic
20 Schematic-Tuner CL-1428
5,12 Schematic-Tuner CL-1633
3 Tube Placement Chart
23 Voltage and Resistance Measurements
15,22
Page
11
7
4,13
2
14
17
21
16
HOWARD W. SAMS & CO.,INC. • Indianapolis 7, Indiana
"Thelisting ofany available replacement part hereindoes not constitute inany
case a recommendation,warranty or guaranty by Howard W. Sams & Co.,Inc.,
as tofhe quality and suitability of such replacement part. The numbers of these
partshavebeen compiled from informationfurnished to Howard W. Sams & Co.,
Inc., bythe manufacturers ofthe particulartype of replacementpart listed."
"Reproduction or use,without express permission, of editorial or pictorialcon-
tent, inany manner, is prohibited. No patent liability is assumedwithrespect to
the use of the information contained herein.Copyright1949 by Howard W.
Sams & Co.,Inc., Indianapolis 7, Indiana, U.S.of America. Copyright under In-
ternational CopyrightUnion. All rights reserved underInter-AmericanCopyright
Union (1910) by Howard W. Sams & Co.,Inc."Printed inU.S.of America
DATE 8/494915-15 SET#67 FOLDER 15
o

THE COOPERATION OFTHE MANUFACTURER OF THIS
RECEIVER MAKES IT POSSIBLE TO BRING YOU THISSERVICE
© YEL-SRN
(®=0
rio
*. Y BRN
t- - Y BRN- Y BRN- BLK
WH- GRN
. PHOTOFACTSTANDARD NOTATION SCHEMATIC
©Howard W. Sams & Co.,Inc.1949
LATE PRODUCTION (
<§> 1
PAGE 2

a ND SOUND IF AMP.
IST SOUND IF AMP
68A6
6BA6 0@[n]
3RD SOUND IPAMP.
6AU6
I5T VIDEO IF AMP.
6AG5
^6SN7GT
-—, V V V
® (§>«»<
VERT. OSC. ocuiPT VERT. OUTPUT
boH/uI

I STA F 1
BAT6 BIA5 CLAMPER
2 T6AL5 L ,

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2rf
^S
55
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m

CHASSIS BOTTOM VIEW-TRANS., INDUC1
PAGE 4

JCTOR AND ALIGNMENT IDENTIFICATION
PAGE 13

C43)(C23)(C22)(C18
CHASSISBOTTOM VIEW-CA
PAGE 12

APACITOR IDENTIFICATION
PAGE 5

RF TUNER-LEFT SIDE
RF TUNER-RIGHT SIDE
PAGE 6

i '
OSC. ADJ.
A17 THRU
RF TUNER-BOTTOM VIEW
RF TUNER-RIGHT SIDE
PAGE?

ALIGNMENT INSTRUCTIONS
If receiver Is aligned with the picture tuoe removed, remove the horizontal oscillator tube V18 (6SN7GT) tc
ellSfang™entSprocitoe' «Mch roUo'ws Is given In order which should be followed when complete alignment Is per-
formed.
VIDEO IF TRAP ADJUSTMENT
DUMMY
ANTENNA
DUMMY
ANTENNA
DUMMY
ANTENNA
SIGNAL
GENERATOR
COUPLING
High side toun-
grounded tube
shield floating
overmixertube
(V2). Low side to
chassis.
SIGNAL
GENERATOR
COUPLING
High side toun-
grounded tube
shield floating
over mixer tube
(V2) . Low side to
chassis.
it
SIGNAL
GENERATOR
COUPLING
High side toun-
groundedtube
shield floating
over mixer tube
(V2). Low side to
chassis.
n
0
"
"
SIGNAL
GENERATOR
FREQUENCY
21.25M3
(Very
Accurate-
ly)
SIGNAL
GENERATOR
FREQUENCY
21.25MC
(Very
accurate-
ly)
n
SIGNAL
GENERATOR
FREQUENCY
21. SIC
25. SMC
22. SIC
2S.2IC
2S.4M3
CHANNEL
9
(If un-
used
locally)
s
CHANNEL
9
(If un-
used
locally)
n
V
CHANNEL
9
(If un-
used
locally)
»
•
n
n
CONNECT
VTVM
C
Probe to Point
Common to
ssis.
OUND IF ALIGNMENT
CONNECT
VTVM
€
Probe to Point
Common to
assis .
DC Probe
oS Common
Chassis.
to Point
to
DEOIF ALIGNMENT
CONNECT
VTVM
DC Probe
<Ju Common
Chassis.
to point
to
. i,
11
»
it
VIDEO IF RESPONSE
ADJUST
Al, A2
ADJUST
A3,A4,
A5,AS
A7
ADJUST
A8
A9
A10
All
A12
REMARKS
Adjust for minimum deflection.
REMARKS
Adjust for maximum deflection.Attenuate
signal generator to maintain a 2. volt VTVM
reading.
Adjust for zeroreading. A positive and
negative reading will be obtained on either
side ofthe correct setting. Repeat thead-
justments ofA6and A7.
REMARKS
Adjust
for maximum deflection.
»
"
"
»
CHECK
Connect a 1 1/2 volt bias battery-negative to pin 2 ofV8, positive 'to chassis.
Connnect the synchronized sweep voltage from the signal generator tothe horizontal Input ofthe oscilloscope for
horizontal deflection.
DUMMY
ANTENNA
SWEEP
GENERATOR
COUPLING
High side toun-
grounded tube
shield floating
over mixertube
(V2). Low side to
chassis.
SWEEP
GENERATOR
FREQUENCY
25MD
(10MC
Sweep)
MARKER
GENERATO
FREQUENCE
31.25MC
22.25M3
25.75MC
! CHANNEL
9
CONNECT
SCOPE
Vert. Amp. to
Polnt«S Low
side to chassis .
ADJUST REMARKS
Check responsecurve tosee that it
is similar to Fig 1. If slight
retouching is necessary to reposi-
tion markers, adjust AlandA2 untl!
21.25fE marker disappears. Adjust
A9 andAllto position the 25.75MD
marker. Adjust A8 and AID to posi-
tion the 22.25MC marker. A12 will
give the curve a flat top. Recheck
the position ofthe 25.75MC marker.
Remove bias battery.
7.
9.
RF TUNERS
This modelreceiver Is made using oneof three tuners-.' Determinewhichtuner is being used and follow the
[alignmentprocedure for thatparticulartuner.
10.
11.
RF AMP.AUCNMENT (TUNER CL-1766)
Connect 1 1/2 volt bias battery as used in video IF alignment. Negative topin2 ofV8, positive to chassis.
Setthe fine tuningcontrol to Its midposltlon. This particular tunerIncorporates oneoftwo types of fine
tuning control. Those tuners having the fine tuning bakellte disc located In back of the oscillator slug and adjust-
ment hole, the midpoint of its range Is when the fine tuningshaft is turned completely counter-clockwise.
Those models having the fine tuningbakelitedisc located in front ofthe oscillator slug adjustment hole, the
midpoint of the fine tuning range is attained when the bakelite disc faces directly downward.
DUMMY
ANTENNA
Two 125
carbon
res.
SWEEP
GENERATOR
COUPLING
Across antenna ter-
minals with 125ffi
resistor in each
generator lead.
SWEEP
GENERATOR
FREQUENCY
207W3
done -
Sweep)
213MC
(10MB
Sweep)
201MC
(10W3
Sweep )
19SMC
(10MC
Sweep)
189MC
(lore
Sweep)
183MC
(10M3
_ Sweep)
177MC
(low;
Sweep)
85IC
(lore
Sweep )
79MC
(10M3
Sweep)
69tC
(10M>
Sweep)
MARKER
GENERATOR
FREQUENCY
205.25MC
209.75MC
211.25MC
215.75MC
1S9.25M3
203.75MC
193.2SM3
197.75M3
187.25MC
191.75M3
181. asw:
185.75tE
175 . 25EC
179.75MC
83.2SM3
87.75M3
77.25MD
81 .75MC
67.2SM3
71.75MC
CHANNEL
12
13
11
10 ' -
9
8
7
6
5
4
CONNECT
SCOPE
Vert .Amp . thru
lOKffl to Point<6>
Low side to chas
sis.
"
ADJUST
A13.A14
A15
REMARKS
Adjust for flat topped response
curve asper Fig 2. with markers
appearing not less than 70$of max.
amplitude ofthe curve.
Check response onall channels. A13
and A14 andA1Smaybe adjusted
slightly to obtain optimum response
on all channels.
PAGE 8

12.
13.
DUMMY
ANTENNA
SWEEP
GENERATOR
COUPLING
SWEEP
GENERATOR
FREQUENCY
63M3
(10KC
Sweep)
57MC
(10MC
Sweep)
MARKER
GENERATO
FREQUENCY
61.25MC
65.75MC
55.25MC
59.75MC
1 CHANNEL
3
2
CONNECT
SCOPE
ADJUST
REMARKS
OSCILLATOR ALIGNMENT CTUNER CL- 1677)
Complete alignment ofthe oscillator circuit maynotbe necessary.. This is determined by checking tosee that a
zero reading Is obtained for each channel when the fine tuningcontrol Is tuned through the midpoint of Its range.
(Connect signal generator and VTVM as In steps 12and13. Sound carrier frequencies are listed In step 13.) If
the majority ofthe channels seem to need oscillator alignment, this sometimes maybe done In one operation-step 13-
by adjusting A16. It should be noted that this Is an all-channel adjustment and should notbe adjusted for Indivi-
dualchannels. If step 12 falls to align the oscillator circuits sufficiently, It will be necessary to adjust the
oscillator coll slugs. These are accessible one channel ata time. Setthe fine tuningcontrol tothe mldposltlon
of its range. (See RF Amp. Alignment Tuner CL-1677 for this setting.)
DUMMY
ANTENNA
Direct
Direct
SIGNAL
GENERATOR
COUPLING
High side toone
antenna terminal .
Low side to chassis.
»
SIGNAL
GENERATOR
FREQUENCY
209.75MC
215.75MC '
209.75MC
203.75MC
197.75MC
191.75MC
185.75MC
179.75MO
87.75MC
81.751*
71.75MD
65.75M3
59.75MC
CHANNEL
12
13
12
11
10
9
8
7
6
5
4
3
2
CONNECT
VTVM
€
Probe to Point
Common to
assis.
ft
"
»
"
n
n
•
u
n
11
ii
it
ADJUST
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
REMARKS
Adjust for zeroreading between positive
and negativepeaks with fine tuning control
at Its midpoint. Rotatechannel selector •
switch and adjust Individual channelsout-
-lined In step 13. Then repeat step 12.
RF AMP. ALIGNMENT tTUNER CL-1428)
10.
11.
IS.
13.
DUMMY
ANTENNA
TW0125S
carbon
res.
n
.n
n
SWEEP
GENERATOR
COUPLING
Across antennater-
minals with 1252
resistor in each
generator lead .
it
n
SWEEP
GENERATOR
FREQUENCY
213MC
(10MC •
Sweep)
207PC
(10MC
Sweep )
20 INS
(lore
Sweep)
195M3
(10MC
Sweep)
189M2
(10MC
Sweep)
183KC
(10MC
Sweep)
177MC
done
Sweep)
85MC
(10MC
Sweep)
79M3
(10MC
Sweep)
69M3
(10M3
Sweep)
63MC
(10W
Sweep)
57MJ
(10MC
Sweep)
MARKER
GENERATOR
FREQUENCY
211.25MC
315.75MC
205.S5MC
209.75MC
199.2511;
203.75MC
193.25M:
197.75MC
187.25MC
191 .75MC
181.25MC
185.75MC
175 . 25MC
179.75MC
83.25MC
87.75MO
77.25BC
81.75MC
67.25M3
71.75MC
61.25MC
65.75MC
55.25M3
59.75MO
CHANNEL
13
12
11
10
9
8
7
6
5
4
3
2
CONNECT
SCOPE
Vert .Amp . thru
10KS to Point <L>
Low side to
chassis.
n
n
ADJUST
A601,
A602,
A603,
A604
A605,
A606,
A607,
A608
REMARKS
Adjust for approx.response pattern
asper Fig 2 with markersappear-
ing more than 70% of peakamplitude
Keep RFand Mixer slug pairs In
approx. same relative position.
Check response pattern forall high
band channels. Slight adjustments
of A601thru A604 maybe required
to obtain optimum response onall
thesechannels.
Adjust for approximate response as
per Fig 2. Keep slug pairs In
approx. the same relative position.
Check response on all low band
channels. Slight adjustments of
A605 thru A608 maybe required to
give optimum response onall these
channels .
ALIGNMENTINSTRUCTIONS
CONTINUED ON NEXTPAGE
-o "
NOT MORE
THAN
SOUND 30Z VIDEO
MARKER } MARKER
FIG. I
FIG. 2
PAGE 9

ALIGNMENT INSTRUCTIONSCCONTJ
OSCILLATOR ALIGNMENT ILTUNER CL-14281
Setthe fine tuning control approximately 140* from Its full counter-clockwise "position. This aligns the holes
In the drive disc with the adjustment screws onthe oscillator switch wafer. Donot change this positionduring
the entire oscillator alignment.
DUMMY
ANTENNA
Fwo 125S
carbon
res.
»
SIGNAL
GENERATOR
COUPLING
Across antenna ter-
minals .
"
-
SIGNAL
GENERATOR
FREQUENCY
315.75MC
209.75MC
203.75MC
197.75MC
191.75MC
185.75MC
179.75MC
87.-75M3
81.75MD
71.75MC
65.75MC
59.751*
CHANNEL
13
12
11
10
9
8
7
5
5
4
3
2
WAVE TRA
CONNECT
VTVM
DO Probe to Point
%£> Common to
chassis.
"
ADJUST
A609 or
A610
A611
A612
A61S
A614
A615
A616
A617 or
A618
A619
A620
A621
A622
REMARKS
Adjust for zero reading. A positive and
negativereading will be obtained on either
sl^fe ofthe correct setting.
n
n
»
••
r
»
n
"
"
n
"
" ADJUSTMENTS C TUNER CL-1428)
Wave traps A623 and A624 are used for specific types of Interference and their alignment will depend upon the type •
encountered. With the receivertuned tothe channel having the Interference set fine tuning control until Inter-
ference isat maximum. Adjust A623 and A624 for minimum interference inthe picture and sound, keeping the cores at
approximately the same relative position. Turn one core 1/2 turn, adjust the other for minimum Interference
14.
15.
RP AMP. ALIGNMENT CTUNER CL-16333
The RF Amp. and Mixer culcuits of this tuner are pre-aligned atthe factory and normally donot require adjust-
ment. However, if tuner is definitely known tobeoutof alignment, it will-benecessary to remove the tuner and
use extended leads forB+andthe filamentsupply. Remove the oscillator tubeV301 andsetthe finetuning control
tothe center of Its range.
DUMMY
ANTENNA
Two 125S
carbon
res.
"
"
IT
SWEEP
GENERATOR
COUPLING
Across antenna ter-
minals with 1258
resistor in each
generator lead.
"
ii
"
V
SWEEP
GENERATOR
I-8EQUENCY
213MC
(10MC
Sweep }
177M3
(10MC
Sweep)
183MC
(10MB
Sweep)
189MG
(10BB
Sweet) )
195MC
(lore
Sweep)
201MC
(10MB
Sweep)
207MC
done
Sweep)
85M3
(10MB
Sweep)
79MC
(10MO
Sweep )
691C
( 10113
'Kwefin 1
63MC
(10MO
Sweep)
57M3
(lore
Sweep )
MARKER
GENERATOR
FREQUENCY
211.25MC
215.75HC
175.25MC
179.75HC
181.35MC
185.75MC
187.25MC
191.75MC
193.25MC
197.7SMC
199.25MC
203.75M3
205.25MC
209.75MO
83.25M3
87.75MD
77.25MC
81.75MC
67.25WD
71 .25Mp
61.25MC
65.75MC
bb.25M3
59.75MC
CHANNEL
13
7
8
9
10
11
12
.6
5
4
3
2
CONNECT
SCOPE
Vert .Amp. thru
10KS2 to Point<3£i
Low side to
chassis.
"
'
n
OSCILLATOR ALIGNMENT CT
ADJUST
A301,
A302,
A3 03,
A3 04
A305,
A306
A307,
A308,
A309,
A310
REMARKS
Adjust for approx.responsecurve
shown in Fig 2. with markersappear-
ing more than 70% of peakamplitude
Keep RFand mixer trimmer pairs In
approximately the same relative
position.
Adjust rings for wave form per Fig.
2.
Check response onall high-band
channels. Slight adjustments of
A301 thru A306 maybe required to
obtain optimum response forall
high-band channels.
Adjust for approximateresponse
asper Fig 2.
Check response on -all low-band
channels. Slight adjustments oh
A307 thru A310 maybe required to
obtain optimum response onalllow
band channels.
JNER CL- 8333
Replace oscillator tubeV301 and recheck the fine tuningcontrol to s ee that it Is atthe midpoint of Its range.
DUMMY
ANTENNA
Two 125S
carbon
res.
n
SIGNAL
GENERATOR
COUPLING
Across antenna ter-
minals .
n
;
SIGNAL
GENERATOR
FREQUENCY
215.75MC
87.75MC
CHANNEL
13
j
\
CONNECT
VTVM
)C Probe to Point
p Common to
chassis .
n
n
WAVE TRAPADJUSTMENT
ADJUST
A311
A312
REMARKS
Adjust for zeroreading. A positive and
negativereading will be obtained on either
side ofthe correct setting.
n
Check tosee that all other channels are
received well within the limits ofthe
fine tuning control. If not, compromise
may be made usingA311 for channels 7 thru .
13and A312 for channels 2 thru 6.
CTUNER CLH633J
Wave traps A313 and A314 are used for specifictypes of Interference and tneir alignment will depend upon the.
typeencountered. With the receiver tuned tothe channelhaving the Interference set finetuning control until
interference is at maximum. Adjust A313 and A314 for minimum interference in the picture and sound, keeping the
cores at approximately the same relative position.Turn one core 1/2 turn, adjust the other for minimum Interfer-
ence.
10.
11.
12
14
16.
17.
PAGE 10

»,i- * it . *<«• *iir \- • •"'" 11
RF TUNER-LEFT SIDE
RF TUNER-RIGHT SIDE
PAGE 11

A PHOTOFACT STANDARD NOTATION SCHEMATIC
©Howard W. Sams & Co., Inc. 1949
RF TUNER
PARTS LIST AND DESCRIPTIONS
TUBES
RESISTORS
ITEM
No.
V601
V602
V603
USE
R. F. Amp.
Mixer
Oscillator
REPLACEMENTDATA
STANDARD
REPLACEMENT
6J6
6J6
6J6
RMA
BASE
TYPE
7BF
7BF
7BF
CAPACITORS
ITEM
No.
C601
C602
C603
C604
CS05
C606
C607
C608
C609
C610
C611
C612
C61S
0614
C615
C616
0617
0618
0619
RATING
CAP.
10
10
1500
270
270
1.5
1.5
.68
4.7
2.2
1500
22
1500
10
4.7
4.7
1500
1500
68
VOLT
IDENTIFICATION
Fixed Trimmer
Fixed Trimmer
RF Bypass
RF Coupling
RF Coupling
Neutralizing
Neutralizing
RF Coupling
RF Coupling
RF Coupling
RF Decoupling
Fixed Trimmer
Osc. De coupl ing
Fixed Trimmer
Osc.Feedback
Osc.Feedback
FilamentBypass
Mixer Decoupling
Fixed Trimmer
ITEM
No.
R601
R602
R603
R604
R605
R606
R607
R608
R609
R610
R611
R612
R613
R614
RATING
RESISTANCE
1508
1502
10002
4700S2
47002
10002
1 Meg.
10K2
10002
1502
47002
472
100K2
LOOKS
wAns
A
I
I
I
I
i
X.
1
X
i
I
IDENTIFICATION
RF Grid
RF Grid
Bias filter
RF Plate
RF Plate
RF Decoupling
Mixer Grid
Mixer Grid Shunt
Mixer Decpupllng
Decoupling
Os c. Plate
Osc.Cathode
Osc. Grid
Osc.Grid
COILS
ITEM
No.
L601
L602
L603
L604
L605
L606
USE
Ant . Input
Interfer-
ence Trap
Interfer-
ence Trap
Filament
Choke
Mixer Grid
Trap
1st. Video
IF and
SoundTrap
DC RES.
PRI.
02
OS'
OS
02
02
.22
SEC.
02
PAGE 14

39Vd
3d-MBA lAIOIlOa SISSVHO

RESISTOR IDENTIFICATION
r- </»
21
PAGE 15

Q m
65
VOLTAGE
AND
RESISTANCEMEASUREMENTS
VOLTAGE
READINGS
Item
V
1
V
2
V3
V4 V
5
V6
V7 V8 V9
V
10
V
1 1
V12
V13
V14
V15 V
16
V17 V
18
V19
V20 V21
V22 V23
Tube
6AG5 6,16
6AG5
6AGB
SAGS
6AG5 6AL5
12AU7
6BA6
6BA6
fiAUfi 6AL5 6AT6 6K6GT
6SN7GT
6SN7GT
6SN7GT
6BG6G
6W40T
1B3GT
5U4G
12LP4
Pin
1
-.3VDC
70VDC
-1
.3VDC
-.4VDC 0V 0V 0V
120VDC
0V 0V -.3VDC 0V -.5VDC
0V -.1VDC 4-10VDC 4-7VDC
0V -75VDC
Pin
2
ov 160VDC
.1VDC .1VDC .Kvnc
1.2VDC
-1.8V
DC
-.7VDC OV
OV OV -.3VDC
OV
6.3VAC 105VDC
475VDC
4145VDC
485VDC 6
.3VAC
315VDC
Pin
3
6
.3VAC
6.3VAC 6.3VAC
6.3VAC
6.3VAC
OV 6.3VAC
4.3VDC
OV
OV
OV
6.3VAC OV 195VDC OV
40V
4-1.8VDC
47.2VDC
340VDC
Pin
4
OV OV
OV OV OV 6.3VAC OV 6.3VAO 6.3VAG
6
.3VAC
6.3VAC OV 6.3VAC
200VDC -.1VDC
40V
4-4SVDC
OV
OV
Pin
5
150VDC
-1.5VDC
110VDC
110VDC
85VDC 80VDC OV 6.3VAC 120VDC
110VDC
65VDC
OV -.7VDC -5.2VDC
225VDC
.325VDC
162VDC
4-.2VDC
265VDC
Pin
6
150VDC
5-4VDC
115VDC
115VDC
115VDC
115VDC
OV 4145VDC
120VDC 110VDC 65V
DC
OV OV -15VDC 8VDC •
9VDC
416.5VDC
40V
4-.3VDC
OV
Pin
7
OV
OV
.1VDC .1VDC .3VDC
1.2VDC
-1VDC
4-.1VDC OV
1VDC
OV -.3VDC 85VDC
OV 6.3VAC 6.3VAC 6.3VAC
OV
6
.3VAC
Pin
8
4.8VDC
OV OV
OV
OV
4240VDC
OV
Pin
9
OV
#
*DONOT
MEASURE
0V I125VDC
280VDC
65VDC
OV
PIN
10
330VDC
365VAC PIN
11
230VDC
OV PIN
12
I125VDC
365VAC
OV
280VDC
RESISTANCE
READINGS
*Do
riot
measure
§
Taken
with
vacuum
tube
voltmeter
4
Measured
from
pin
3 ofV17
t
6.3VAC
measured
across
filament.
Hem
V
1
V2
V
3
V
4
V
5
V6 V7
V
8
V9
V
10
VI
1
V
12
V13 V
14
V15 V16
V
17
V
18
V19
V20
V21 V22 V23
Tube
6AQ5
6J6 6A05 6AG5 6AG5 6AG5 6AL5'
12AU7
6BA6
6BA6 6AU6 6AL5 6AT6 6K6GT 6SN7GT
6SN7GT
6SN7GT
6BG6G 6W4GT 1B3GT
5U4G
12LP4
Pin
1
2
Meg.
16KB
2
MeK.
2
Meg.
2
Mea.
.12
02
T5K2
02 470K2 22K2 200K2
10
MeE.
Inf.
1
Meg.
2.5
Meg.
850K2
Inf.
7502
Inf. Inf. T1.2KS
Pin
2
02
T
10002
40S2 402 402
1502 1
MeK.
1
Meg.
02
02 02
100K2
Offi
.12
T68K2 *4
Keg.
»1.5Meg.
»250K2
.12
140K2
Inf.
10K2
T5K2
Pin
3
.12 .12
.12 .12 .12
02
.12"
10K2 02 02
02
.12
02
T1.5K2
02
7502 280K2
8002
140K2
Inf.
Inf.
PIN
10
»56K2
Pin
4
02 02
02
02 02
.12
02
.12
.12 .12 .12
02
.12
11.2K2
4
Meg.
2.2
Meg.
200K2
Inf. Inf. Inf.
7502 PIN
11
T4002
Pin
5
TS.5K2
220K2
T2.2KS T2.2K2
T5K2
T8K2
1502
.12
T8K2
T2.5KS2 T11.5K2
02
4
Meg.
470K2
TS902 T8002 »140Kffi
1
MeE.
9K2
Inf.
Inf.
PIN
12
T1.2KS2
Pin
6
13.5K2
10K2
T2.2K2 T2.2K2 T2.2K2 T2.2K2
02
T5.5K2 T2.2K2
T2.5K2 T11.5K2
02
Inf.
1352
6.8K2 6KS!
1.8K2
7502
1
Meg.
Inf.
Inf.
7802
Pin
7
02 02 402 402 408
1502
SKffi
1
Meg.
1502 822 02
100K2
T330K2
02
.12 .12 .12
02 02
Inf.
Inf.
Pin
8
8002
02
02 02 02
T5K2
.12
Inf.
10K2
Pin
9
02
»200ffl »350!2
t
Measured
from
pin
8 ofV22
»
Measured
from
pin
3 ofV20
1.
DC
Voltagemeasurements
areat
20,000
ohms
per
volt;
AC
Voltage
measured
at
1,000
ohms.
2.Pin
numbers
are
counted
ina
clockwise
direc-
tion
on
bottom
of
socket.
3.
Measuredvalues
are
from
socket
pin
to
com-
mon
negative
unless
otherwisestated.
4.
Line
voltage
maintained
at
117
volts
for
volt-
age
readings.
5.
Front
panels
controls
setat
minimum.
6.
Wherereadings
may
varyaccording
tothe
setting
ofthe
service
controls,
both
minimum
and
maximumreadings
are
given.

A PHOTOFACTSTANDARD NOTATION SCHEMATIC
©Howord W. Sami & Co., Inc. 1949
RF TUNER
PARTSLIST AND DESCRIPTIONS
TUBES
RESISTORS
ITEM
No.
/WIT
fan?.
1/303
USE
RF Amp.
Mixer
Oscillator
REPLACEMENT DATA
STANDARD
REPLACEMENT
6J6
6J6
6J6
BASE
TYPE
7BF
7BF
7BF
CAPACITORS
ITEM
No.
0301
G30£
C303
C304
C30E
C30£
C301
csoe
C30£
C31C
C311
C31£
C31E
C3K
C31E
csie
RATING
CAP.
8
8
1500
300
300
1.5
1.5
500
500
1500
4.7
4.7
500
1500
68
300
VOLT
IDENTIFICATION
FixedTrimmer
Fixed Trimmer
BiasFilter
RF Coupling
RF Coupling
Neutralizing
Neutralizing
FilamentBypass
RF Bypass
MixerGridFilter
Osc.Feedback
Osc.Feedback
Filament Bypass
Mixer Decoupling
Fixed Trimmer
IF Coupling
ITEM
No.
R301
R302
R303
R304
R305
R306
R307
R308
R309
R310
R311
R312
R313
R314
RATING
RESISTANCE
1502
1508
10002
10K2
1000S
10002
56002
1Meg
10002
10002
100K2
100K2
472
1000S -
WATTS
i
i
^
£
-£
1
-£
i
2
I
i
IDENTIFICATION
RF Grid
RF Grid
Bias Filter
RF Coil Shunt
RF Plate
RF Plate
MixerCoilShunt
Mixer Grid
Osc. Plate
Osc. Plate
Osc. Grid.
Osc.Grid
Osc. Cathode
Mixer Decoup..
Sf
3"
-"I
8js
»k
- O
COILS
ITEM
No.
L301
L302
L303
L304
L305
L306
L307
L308
L309
L310
USE
Interfer-
ence Trap
Interfer-
ence Trap
Ant . Input
RF Low Band
RF High
Band
Mixer Low
Band
Mixer High
Band
Osc. Low
Band
Osc.High
Band
IF Trans.
DC RES.
PRI.
02
02
02
02
02
02
02
02
02
.22
SEC.
_
02
PAGE 17