Philco 50 User manual

PHIL.CO
Service Bulletin~No. 86
Models 50 and 50-A Receivers
Model 50 Receivers are for operation on 100-130volt, 50-60 cycle AC lines
Model 50-A Receivers are for operation on 100-130 volt, 25-60 cycle AC lines
Table 1-Tube Socket Readings Taken with AC Set Tester AC Line-115 volts
Tube Screen Control Plate
I Filament Plate Grid Grid Cathode MIiii-
Type Circuit Volts Volts Volts Volts Volts amperes
24 1st R.F. 2.4 245 90 2.5 3.0 4.5
24 -2nd R.F. 2.4 250 90 2.5 3.0 5.5
u Det. I 2.4 100 42 8.0 8.0 u
47 Output 2.4 I 175• 190* 1.0* ... 2.7*
80 Rect. 5.0 . . . . .. ... .
.. 30/
Note_:_Volume Control on full; Station Selector turned to Low Frequency End.
*These readings must be taken from the underside of the chassis, using test prods and leads unless the set checker is
specially equipped for testing pentode tubes.
Table 2-Power Transformer Voltages
Terminals A.C. Volts j Color
__________ ,_______ 1_________________ 1---------------
1-2
3-5
6-7
8-10
4
9
No. on Figs.
2 and 3
®@
@@
®
@
@
®
@
®
No. on Figs.
3 and 4
@
~
®
®
®@
®
@
@ (2o)
105 to 125
2.5
5.
700.
Primary
Filament of 24 and 47
Filament of 80
Plates of 80
Center Tap of 3-5
Center Tap of 8-10
Table 3-Condenser Data
.00025
.01
.05
Capacity MFD
.05 and 150 Ohm resistor
.1, .15, .25, 2-.5 (50-60 cycles)
.05, .15, .25, 2-.5 (25-40 cycles)
.05
(50 to 60 cycles) 6.
(25 to 40 cycles) 10.
6.
Table 4-Resistor Data
Power
(Watts) Resistance
... 150and .05 Mfd.
.5 10,000
1. 15,000
1. 25,000
.5 32,000
.5 99,000
.5 160,000
.5 240,000
.5 490,000
Body
Black (Small Gauge)
Black
Light Blue
Yellow
Black, Yellow Tracer
Yellow, Green Tracer
Container
Yellow
Black Bakelite Container
Black Bakelite Container
Black Bakelite Container
Metal Container
Electrolytic
Electrolytic
Electrolytic
Color
Tip Dot
Black Bakelite Con tainer
Brown Black Orange
Brown Green Orange
Red Green Orange
Orange Red Orange
White White Orange
Brown Blue Yellow
Red Yellow Yellow
Yellow White Yellow
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PHILCO MODELS 50 AND 50-A
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PHILCO MODELS 50 AND 50-A
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Fig. 2
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pH,l~.CO
Page 4 Service Bulletin No. 86
ADJUSTMENT OF MODELS 50 AND 50-A
Adjustment of the compensating condensers in the model 50 should be done with the aid of a
good oscillator for the R.F. signal. The oscillator lead should be connected to the "ANT" terminal
of the receiver. A good ground connection must be made from the receiver to the grounded side of
the oscillator and to a water or radiator pipe.
Either the ear method or an output meter, connected across the speaker voice coil terminals
can be used while adjusting.
When the Receiver is set up for operation, adjust the oscillator signal to a frequency which is
approximately 1400 kilocycles.
With the volume control advanced to maximum, and using a weak oscillator signal, tune the
receiver sharply to the oscillator note.
Adjust the third R. R compensating condenser by means of the Philco fibre wrench, part 3164,
for maximum output signal. If an output meter is being used, adjust for maximum reading.
Next adjust the second R. F. compensating condenser and finally the first. In each case, always
adjust for maximum signal or reading.
REPLACEMENT PARTS MODELS 50 AND 50-A
No. on
Figs. 3 and 4 Description
CD Volume Control
® First R. F. Transformer
@ Gang Con,denser
© Compensating Condenser (Part of
Gang Condenser Assembly)
© Second R. F. Transformer
© Compensating Condenser (Part of
Gang Condenser Assembly)
0 Third R. F. Transformer .
® Compensating Condenser (Part of
Gang Condenser Assembly)
® Condenser-250 Mmf.
@) Condenser-250 Mmf.
@ Resistor-10,000 Ohms
@ Condenser-.01 Mfd.
@ Resistor-240,000 Ohms
@ Resistor-490,000 Ohms .
@) Bypass Condenser (.15 Mfd., .25
Mfd., 2-.5 Mfd., .1 Mfd.) 50-60
cycles
(.15Mfd., .25Mfd.,2-.5Mfd.,.05
Mfd.) 25-40 Cycles .
@ Bypass Condenser-.01 Mfd.
@ Output Transformer
@ Voice Coil and Cone Assembly
@ Speaker Field (Assembled with
Pot and Frame)
@ Resistor-490,000 Ohms.
@ Resistor-160,000 Ohms.
@ Resistor-150 Ohms and Con-
denser-.05 Mfd.
Part No.
5232
03283
03293
03284
03284
3082
3082
4412
3903-L
4410
4,517
03459
03455
3903-N
2660
02970
02942
4517
5331
3615-X
No.on
Figs. 3 and 4 Description
@ Resistor-15,000 Ohms
® Bypass Condenser-.05 Mfd.
@ Bypass Condenser- (.05 Mfd.)
(combined with @)
Part No.
5278
3615-L
@ Resistor-25,000 Ohms 3656
@ Resistor-99,000 Ohms 4411
@ Resistor-32,000 Ohms 5279
@ Resistor-99,000 Ohms 4411
@ On-Off Switch . 5382
® Power Transformer-50-60 cycles 5266
Power Transformer-25-40 cycles 5267
Power Transformer-50-60 cycles
210-240 volts
@ Electrolytic Condenser-6 Mfd.-
50-60 cycles .
Electrolytic Condenser-IO Mfd.
25-40 cycles .
@ Electrolytic Condenser-6 Mfd.-
25-40 cycles and 50-60 cycles
Tube Shield
Knob (Large)
Knob (Small)
Spring (For Dial Knobs) Small
Spring (For Dial Knobs) Large
Grid Clip
Five Prong Socket Assembly
Four Prong Socket Assembly
Dial Complete .
Bezel
5268
4916
5142
4916
03390
03064
03427
4147
5262
4897
4956
5026
03322
,5383
PJ,IILADELPHIA STORAGE BATTERY COMPANY
Ontario and C Streets, Philadelphia, Pa.
Printed in U. S. A.
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