Philco 80 User manual

PHILCO
REG.U.S.PAT.Off
Service Bulletin~No. 140
Model 80
The Philco Radio Model 80 is a four tube
superbeterodyne, employing the new Philco high
efficiency tubes with pentode output and electro
dynamic speaker. The set uses a Philco type 36
tube as first detector and oscillator, a type 36
second detector, a type 42 output, and a type 80
rectifier. The intermediate frequency for tuning
the 1.F. transformer is 450 kilocycles. The power
consumption of the Model 80 is 46 watts.
_IL
Q
I
I G 42
OUTPUT
36 36 80
2NDDE:tDET~osc. RECTIFIER
~@
~
F=Filament
I'= Plate SG =Screen Grid
CG =Control Grid K =Cathode
Fig. 1-Tube Sockets, Under Side of Chassis
CAUTION: Never connect the chassis to the power supply
unless the speaker Is connected and all tubes are In place.
Table 1-Tube Socket Data*-Power Line Voltage 115Volts
Tube FIiament Plate Screen Grid Control Grid Cathode
Volts Volts Volts Volts Volts
Type Circuit F to F P to K SG to K CGtoK K to F
36 Det.-Osc. 6.3 245 165 6.4 8.4
36 2nd Det. 6.3 40 15 .4 0
42 Output 6.3 240 255 4 0
80 Rectifier 5.0 340/Plate . . . ... ...
*All of the above readings were taken from the under side of the chassis, using test prods and leads with a suitable A.C.
voltmeter for filament voltages and a high resistance multi-range D.C. voltmeter for all other readings. Volume control at
maximum and station selector turned to low frequency end. Readings taken with a radio set tester and plug-in adapter will
not be satisfactory.
Table 2-Power Transformer Data Table 3-Resistor Data
Terminals A.C. Volts Circuit Color Nos. on Resistance Power Color
1-2 105 to 125 Primary White Figs. 2 and 3 (Ohms) (Watts) Body Tip Dot
3-5 6.3 Filament Black
6-7 5.0 Filament Blue
of 80
8-10 630 Plates of Yellow
of 80
4 ... Center Tap Black Yellow
of 3-5 Tracer
9 ... Center Tap Yellow Green
of 8-10 Tracer
~
325 .. Wire Wound
9,000 1. White Black Red
® @ 10,000 .5 Brown Black Orange
@ 16,000 5. Brown Blue Orange
® 240,000 .5 Red Yellow Yellow
@ 490,000 .5 Yellow White Yellow
@ 1,000,000 .5 Brown Black Green
@) 4,000,000 .5 Yellow Black Green
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Page 2 PH I LCO
Service Bulletin No. 140
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philcoradio.com

No. 140
PH I LCO
Service Bulletin
Model 80
RECTIFIER.
SOCKET
Fig. 3-Bottom View of Chassis, Showing Parts
Page 3
0
!18 32.
54
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Page 4
PH I LCO
Service Bulletin No. 140
ADJUSTING MODEL 80
Facing the back of the chassis, the compensating condenser at the right with the micarta hex head
nut should be adjusted for maximum sensitivity at the time of installation. This adjustment should be
done in the following manner.
Place the radio in operation as described below, tuning to a station near the middle of the dial.
Turn the adjusting screw clockwise with a screwdriver until a swishing sound is heard and until a squeal
is heard when different stations are tuned in. Now turn the screw counter-clockwise until the swishing
sound just ceases. Continue to turn in the same direction about one quarter of a revolution beyond
this point. Tune to different stations over the dial, noting that the squeal is n-0tpresent on any stations
received. If such a noise is present at any section of the dial, the adjusting screw should be turned
farther in a counter-clockwise direction until the noise stops. Should the type 36 tube under the metal
shield ever be replaced, this adjustment should be repeated.
Under normal conditions, it will never be necessary to re-adjust any of the other compensating
condensers. If for any reason such adjustment should be required, it should not be attempted without
first receiving the proper instructions and equipment from your Philco distributor. The Philco Model
095 B oscillator has been especially designed for use in this work, and will be found the most inexpensive
and the most reliable for the purpose.
REPLACEMENT PARTS MODEL 80
No. on
Fil!.•- 2 and 3 Description Part No.
© Volume Control-Combined with Ou-Off
Switch . . . . . . 7439
CD Antenna Transformer . 05831
® Tuning Condenser Assembly . . . . 05794
© Compensating Condenser - Antenna -
Part of Tuning Con. Assembly .
® Condenser (710 Mmf.) White and Yellow 4520
© Resistor (10,000 Ohms) . . . . . . 4412
® Compensating Condenser-1.F. Primary 04000-A
® Oscillator Coil . . . 05832
® Resistor (9,000 Ohms) . . . . 7501
@) Condenser (.09 Twin) 4989-B
@ Resistor (16,000 Ohms) . . . . 7500
@ Compensating Condenser - Low Fre-
quency:. . . . . ... 04000-S
@ Compensating Condenser - High Fre-
quency - Part of Tuning Con.
Assembly ............ .
@ I.F. Transformer . . . . . . 05834
@ Resistor (4,000,000 Ohms) Mounted on
I.F. Transformer. . . . . . . . . . 6010
@ Condenser (50 Mmf.) White-Mounted
on l.F. Transformer . . . . 3774
@ Compensating Condenser-1.F.
Secondary ..... .
@ Compensating Condenser . . .
@ Resistor (1,000,000 Ohms)
@ Resistor (10,000 Ohms) . .
@ Condenser (1,000 Mmf.) Green and White
@ Resistor (240,000 Ohms) . . . . . . .
@ Pilot Light . . . . . . . . . . . . .
04000-D
04000
4409*
4412
5215
4410
6608
No. on
Fi!!.s. 2 and 3 Description Part No.
@ Condenser (.015 Mfd.) 3793-B
@ Resistor (490,000 Ohms) 4517•
® Condenser (.006 Mfd.) . 7625-B•
@) Output Transformer . . . 2660
@ Voice Coil and Cone Assembly . . . 02861
@ Speaker Field and Bucking Coil As-
sembled with Pot . . 02677•
® On-Off Switch-Combined with Volume
Control ..... .
@ Condenser (.01 Mfd.) . . . . .
@ Power Transformer 50-60 Cycles
Power Transformer 25-40 Cycles .
Power Transformer 50-60 Cycles, 230 Volts
@ Electrolytic Condenser (8.0 Mfd.)
@ Electrolytic Condenser (4.0 Mfd.)
@ Resistor (325 Ohms) Wire Wound
@ Electrolytic Condenser-Dry-(10 Mfd.)
(3§) Condenser (.01 Mfd.) . . . . . . . .
Bezel
Dial Complete
Tube Shield .
Knob (Large) .
Knob (Small) .
Knob Spring
Grid Clip . . .....
Four Prong Socket Assembly
Five Prong Socket Assembly
Six Prong Socket Assembly
Chassis Mounting Screw .
Chassis Mounting Washer
Rubber Washer . . . . .
Pilot Lamp Shield . . . .
7469
3903-AH•
7421
7422
7423
6707
7467
7465*
7440•
3903-AJ•
7417
05828
7172
03063
03064
5262
4897
5026
4956
6417
W-567
W-315
5189
5760
• A number of circuit changes were made on chassis of run No. 5 and above. This run number is rubber
stamped in a star on the back of the chassis. Refering to Figs. 2 and 3, the condenser @ connects to the B- end
of resistor @ instead of to ground. The bucking coil - that section of @ in series with the voice coil - is shorted
out. The 10 mfd. dry electrolytic condenser @ is eliminated, and replaced with a substitute .015 section combined
with @, part 3793R. The .01 mfd. condenser @)is eliminated. The positions of @) (,§Jand @, are changed in the
chassis from that shown in Fig. 3.
PHILCO RADIO & TELEVISION CORPORATION
September, 1932
Printed in U.S. A.
Service Department
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