PH I LC 0
REC. U.S. PAT. Ol'F .
Service Bulletin~No. 130
Model 15 Series
The Philco Radio of the 15 series is an eleven-tube superheterodyne, employing the high efficiency
6.3-volt filament tubes, automatic volume control, superpower push-pull pentode output, and twin
n
n n
electro-dynamic speakers. Philco
shadow tuning and
the combina-
tion distance switch and power
switch on the control panel are
additional features. The
m-
termediate frequency used in
adjusting the superheterodyne
circuit of the 15 series is 175
kilocycles. The total power
consumption is approximately
115
watts.
I I~---==,---------------------'(
~
CG~F4·2
SGWF
37 9 @42
~
CG SG
37@ 37 44 44 44 37 44
G SC SC SG G SG
f]Qfi]t:3~54
Flll.1-Tube Sockets , Under Side of Chassis
80
FF
11\l
~
PP
F Filament BG Screen Grid K Cathode
P Plate CG Contr ol Grid
Caudon : Never connect the chassis to the power supply unl ess the speakers are con-
nected and
all tubes are in place.
Table 1-Tube Socket Data*-A. C. Line Voltage 115 Volts
Tube
Filament
Plate
Screen Control
Cathode
Grid Grid
Volta Volts
Volts Volts
Volts
Type
Circuit
FtoF P to K
SG to K
CGtoK
K toF
44
R. F.
6 .3
165
55 15.
30
44
1st Det . 6 .3 250 90 .85
10
37
Osc.
6 .3
60
...
Hi .
10
44
1st I. F. 6 .3
250
90 .85
10
44
2nd I. F. 6.3 275 90 3 .3
10
37
Det.-Rect. 6 .3
0
... .2
10
37
1st Audio 6.3 75
...
.4
10
37 2nd Audio
6.3
100
.. .
.2
10
42
P. P. Output
6 .3
255 270 15
15
42 P. P. Output
6 .3
255
270.
15
15
80
Rectifier
5.0 320/ Plate
I • *All of the above readin gs were taken from the under sideJof the chassis using t est pro ds and leads with a suit able A. C. volt meter for filament
volta ges and a high resistance multi•range D. C . voltmet er for all oth er readings. Volume cont rol at maximum aml ~tat ion selecto r turn ed to low
frequ ency end. Power switeb in middle position.
Table 2-Power Transformer Data.
Ter-
minals
on Fills. 3 A. C. Volta
and 4
1-2
3-5
6-7
8-10
4
9
105 to 125
6 .3
5 .0
720
Circuit
Primary
Filament
Filament of 80
Plates of 80
Center Tap of 3-5
Cente r Tap of 8-10
Fil\. 2-lnternal Connections Filter Condens er-
50-60 Cycles
No.on
Power
Fill,s. 3 &4
(Watts )
@ ..
@ .5
@@
.5
CD @
, .5
@
1.
@
.5
®
.5
@ .5
@ .5
@c!)@}
.5
@-@
.5
®
.5
(17)
.5
@
.5
Table 3-Resistor Data
COLOR
Resistance Ter-
(ohms)
mlnals
Body Tip
Dot
·- -
{ 50
1-2}
50
2-3
Long Tubular
205
3--4
1000
. .. .
Brown
Black
Red
·5000
... . Green Black
Red
10,000
. . . . Green
Black
Orange
13,000
. . ..
Brown
Orange
Orange
25,000
....
Red
Green
Orange
51,000
. .. . Green Brown
Orange
99,000
. . ..
White
White
Orange
160,000
. ...
Brown
Blue
Yellow
240,000
.... Red Yf'llow
Yellow
490,000
. .. .
Yellow
White Yellow
1,000,000
.. ..
Brown
Black Green
1,500,000
....
Brown Green
Green
2,000,000
....
RPd
Black Green
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