Philco Radio & Television Corp. 17 Schematic

Get a print!
Price: $8.00
In stock
Product Information:
Model:17
Manufacturer:Philco Radio & Television Corp.

Schematics Content:

Please note: this content is a computer-generated interpretation of the above schematic and is provided only to help assist you in locating this schematic. For the actual text, please consult the schematic above. Thank you.

Page 1:

PHILCO RADIO 86 TELEVISION CORP.

Model! 16 and 17

Change in Volume Control circuit

The change in the volume control circuits of Models 16 and 17, outlined in this bulletin, is
recommended in EVERY case where rotation of the volume control is accompanied by noise-traceable
to the control.

PRODUCTION BEGINNING WITH RUN No. 4 FOR MODEL 16 SERIES, AND RUN
No. 4 FOR MODEL 17.SERIES, INCLUDE THESE CHANGES.

Model 16

1. The Volume Control and "On-OE" Switch (R) is replaced by Volume Control and "On-0E"
Switch, Part No. 33-5022, having an overall value of 2 megohms. The movable element of the Vol~
ume Control goes to @ as heretofore; the tap to the resistor (R) mentioned under (2) below; the end
nearest tap, to ground; and the opposite end to the .01 'mfd. condenser'mentioned in (3).

2. Resistor (R) (GreemBlack-Red) is replaced by Resistor (Orange-Red-Orange), (32,000 ohms),
Part No. 5279.

3. A resistor (Orange-Orange-Yellow) (330,000 ohms), Part No. 6046, is added, with one side
grounded to frame; the other joining the original circuit at (R) and (R); this same point (high side
of 330,000 ohm resistor) connected through a .01 mfd. condenser, Part N0. 3903-J, (added), to the
high side of the Volume Control.

4. Tone Control (R) is replaced by Tone Control, Part No. 30-4069, inclosing a .09 mid. and a
.003 mfd. condenser, with two .025 mfd. condensers in a single external housing, Part No. 7653-C,
which replaces the two external condensers @ in metal container. The .09 mfd. condenser is on the
first tap of the tone control; one of the .025's is on the second tap, while the third tap is permanently
connected to ground through the other .025 mfd. The "fourth" tap of the tone control (previously
connected through the .006 mfd. condenser) is connected to the .003 mfd. condenser, connecting to
the original circuit at the plate of the first A. F. tube (type 77) and to@.

5. It is essential that A. C. shielded cable (Part No. 11-1655) be used to connect the "On-OE"
switch. The cable is a special two-conductor shielded and braided conductor. The shield of this cable
is brought out at one end and tied to ground. This cable should be kept as close as possible to the
chassis frame. At the power transformer (R) one lead of the shielded cable is connected to the external
A. C. cable. In order that the other lead may be connected to the primary lead ofthe power trans-
former, it is necessary to use a stand-oi insulator (Part No. 03103). This insulator may be mounted
at any convenient place.

Model 17

1. The Volume Control and "On-0 " Switch @ is replaced by Volume Control and "On-Off"
Switch (Part No. 83-5023), having an overall value of 2 megohms. The movable element goes to (R)
as heretofore; the tap to the resistor @ mentioned under (2) below; the end nearest tap, to ground;
and the opposite end to the .01 mfd. condenser mentioned in (3)

2. Resistor Q (Green~Blaek-Bed) is replaced. by resistor (Bed-Grecn-Orange) (25,000 ohms),
Part No. 4516.

Continued on next page

vPHILCO PAGE 4-9

Page 2:

PAGE 4-10 PHILCO

MODEL 16

cm" PHILCO RADIO 86 TELEVISION CORP.
MODEL 17

Changes

3. A resistor (Violet-Black-Orange) (70,000 ohms), Part No. 5385 is added, with one side
grounded to frame; the other joining the original circuit at (R) and (R); this same point (high side of
70,000-ohm resistor) connected through a .01 mfd. condenser (Part No, 3903-J) (added) to the
high side of the volume control.

4u Tone Control (R) is replaced by Tone Control, Part No. 30-4070, inclusing a .09 mid. and a
.003 mfd. condenser, with two .025 mfd. condensers in a. single external housing, Part No. 765311,
which replaces the two external condensers @ in metal container. The .09 mfd. condenser is on the
first tap of the tone control; one of the .025 mfd. condensers is on the second tap, while the third tap
is permanently grounded throughthe other .025 mfd. condenser. The "fourth" tap of the tone con-
trol (previously connected through the .006 mfd. condenser) is connected to the .003 condenser, con-
necting to the original circuit at the plate of the first A. F. tube (type 77), and to @.

5. It is essential that A. C. shielded cable (Part No. 11-1655) be used to connect the "On-OE"
switch. This cable is a special two-conductor shielded and braided conductor. The shield of this
cable is brought out at one end and tied to ground. This cable should be kept as close as pos-
sible to the chassis frame. At the power transformer @ one lead is connected to the external A. C.
cable. In order that the other lead may be connected to the primary lead of the power transformer,
it is necessary to use a stand-off insulator (Part No. 03103). This insulator may be mounted at any
convenient place.

Production to include the change Will be Run No. 5 for both models, instead of
Run No. 4.

Model 16 MOdel 11

An error occurs in thc designation of Part No. 7084, as Speaker Socket of Code 121 (Models 16
and 17). Part No. 7084 is Speaker Socket Hole Cover and has s, list price of 75 cents per hundred, as
shown in Bulletin 170, under Model 16-121-122. The Code 121 of Models 16 and 17 does not have a
Speaker Socket. Part No. 7084 covers (in Code 121) the opening which accommodates Speaker Socket
Part No. 4957 in Code 122.

This correction should be made to Bulletin No. 161, bottom of second page, under NOTE; to
Bulletin No. 165, bottom of fourth page, under NOTE; and to Bulletin No. 170, as noted above.

Page 3:

PHILCO PAGE 4-11

MODEL 1'l
PHILCO RADIO SL TELEVISION CORP. VUIMSM Pit!
chassis vis'
Soolcot layout

MODEL 1 7

The Philco Radio Model 17 is on eleven tube superheterodyne, designed for operation on
alternating current. The same superheterodyne circuit is used for standard broadcast, police broad-
cast and`airport and aircraft reception. The frequency coverage upon the two bands is,-

The receiver employs a Philco Type 78 tube in the pre-selection circuit, a Type 6A? as a com-
bination first detector and oscillator, a Type 78 for thc intermediate frequency, a Type 37 for second
detector, a Type 37 for automatic volume control, and a Type 78 for automatic interstation noise sup-
pression. The first audio frequency stage is a Type 77 tube, the driver (2nd A.F.) is a Type 42; the
class "A" amplilication is accomplished with two Type 42's as triodes, and the rectifier is a Type 5Z3.
The intermediate frequency used in adjusting the superheterodyne circuit is 175 kilocycles. The
power consumption is 130 Watts.

Table l-Tube Socket Data*-A. C. Line
NOTE: These values are for Model 17-122.
Voltage 115 Volts Model i7-121 uses i Type so Rectifier. see
note at end of Parts List.
' ' ' ' cj sw ' ' " Table 2~Power Transformer Data

&10 800 Plates of 518 Yellow
Control Grid Volts-CG N N ~
'A1 K.. (8A7-64 to K) 585%!! 3.7 .26 .25 .24 24 M 84. 34. ... 4 ,.i Center Tap ol 3-5 Black-Yellow Tfmr
Cathodevults-KMF. . 0 O 3,7 U lli 0 0 0 0 0 . H l . . Center Tap 018-10 Yellow-Green Tracer

6A7>>Gl to K = 22.0 Volta
6A7-GZ to K = 140.0 Volts I

'All o! the above readings were tuken [rom the underside ol the chassis, using test rods snd hath, with s suit-bis AMC, vnltinetsr (or ilunent
voltages, and s high-resistsnos multi-range D. C. voltmeter (or sll other readingi. Vo "me control st nisximiini .ind _st-tum selector turned to low
lrequency and; interststioii noise suppression oil-suit potentiometer tunird sll t s way m right; and toggle switch (iiitPi-itstwii noise suppression
circuit) in "ON" position. Readings tlken with a Indio set tester and plug-in adapter "ill NOT be satisfactory.

ms 'www sum munch

Fig. l-Thp View of Chllsll, showing Tube Fig. I-Bottom View 0| Chlllls,
Loudon., and Major Parts showing Pulte

Jun, ,933 Terminal Arrangement of Tube Sockets Viewed from Under. Side of Chassis.

EHective December 20th, the shadowrneter used on Model 17 will be No. 45-2028 instead of _the
N0. 6497 previously used. The new shadowmeter gives a somewhat better deflection when tuning.

Page 4:

PHILco RADIO a TELEVISION coRP.

Trimmer (his,

gigs ;?_ E?zoumw

Page 5:

' PHILCO RADIO 8( TELEVISION CORP.

The adjustment of the I. F. compensating condensers is first completed. The inter-
mediate frequency is 175 K. C. An accurately calibrated signal generator is necessary
for these adjustments. The Philco All-Purpose Set Tester Model 048 is recommended.

Next, the high frequency, detector, and antenna compensating condensers (located
upon the tuning condenser) are adjusted, followed by the adjustment of the low
frequency compensating condensers.

Care should be exercised in each individual adjustment.

It is advisable to give a final re-trimming to the intermediate frequency compen-
sating eondensers,

All adjustments of the Model 17 Series compensating condensers can be accom-
plished from the top of the chassis.

REPLACEMENT PARTS FORrMODEL 1-7

No. on Pu: L1" N04 an ' Pan Luc
rip, nga-1pm". Number Prim rip. Daerlpnon Numb-f me.
ste Band Switch ................ 42-1035 . v . 1 >> Resistor (White-White-Orange) ..... 4411
Resistor (Brown-Black-Orenge) . 4412 . Condenser ....................... 3003-L
Antenna Transformer ......... 32-1170 . . 1 Condenser .................. . . .
Resistor (Brown-thk-Grsen). . 4409 . Resistor (Brown-Blue-Yellow), . . .
Condenser ................. . . . . ~ Condenser .......................
: Resiswr (Bmwn-Blnck-Red), . . A Resistor (Violet-Bhok-Orsnge) .....
Condenser (Double) ...... 4 . 4 . Resistor (White-White-Orange) .....
Tuning Condenser Assembl . . . , . . Filter Condrmssr Bank, .
Compensating Condenser (In . , Input Trnnsforlner. . .
of@)4C .......... ..., Condenser ....................
Resistor Brown- mon 1 4409 . .
Condenser (Double) ......... anis-AP . _ , 4 vae Coll# Cone Assembly

Com nsating Condenser Oscillator) . 4 . . . . . .
gon my __ _d _a _ _ _ 7301 R _ Voltzguidgmvxder Resistor (Wire- l
Resistor (Green-Brown-Ornnge).. . , 4 4518 , H - 30-2003
Oscillator Transformer. 4 . . . _ my: gGmmBm`RegLai ~ A
' Resistor (Brown-Green-Orsnge).. _..
Resistor (Bmwn-Orsnge-Onnge). , 1.
Fompensstmg Cond. (ISL I- F* _ _ _ _ Volume Control k "011W ' Switch.

Compensating Cond. (2nd. I. F4 Sec
mot Lam (shadow Tuning Mem); ' mml'mr Dau'mble is() '6033)
Shadow umng e_r.. ~ nenser ..........
Reiki" (WhWe-Whltenrlnge) - 1 Condenser (Electrolytx
Condenser (Double).. , 4 , , 4 . . . Pilot 14m (Stotiou Selector).
Pondenser ........... . . . Tube sh'eni ,,,,,, '_ __________
Resistor (Y ellow-Blsck-Green). 4 . 6010 . Four Pmng Socket.
W1 058 ; n 'On 0156 Bix Prong ocket. ..
Supp. Fkt.) ................... , 42-1036 . . . , Seven snakesA
Resistor Yellow~White~Yellow).. 4517 . Knob (large ........ . . .
Resistor Rm-thk-Grem) ........ 5872 .1) Knob (small) ..................... 03064
No'rE; Model 17-121 m l Type so tube in lieu of szs; Pown- 'rnmfomer (so-am) Q No. swoon; Runw- (Bm-Bhsk-ormn) Nm
33-1024 in both @ and @; Electrolytic Condenser! (R) No. 6707 and (R) N0. 7464; kau' "K-17";Spn\ker Socket No. 7084; Spank!! Clbln L-lm

Page 6:

PAGE 4-14 PHILCO

MODEL 17A-122,
Changes

PHILCO RADIO 8C TELEVISION CORP.

Model 17

1. The Volume Control and "On-Off" Switch (R) is replaced by Volume Control and "On-OE"
Switch (Part No. 33-5023), having an overall value of 2 megohms. The movable element goes to @
as heretofore; the tap to the resistor @ mentioned under (2) below; the end nearest tap, to ground;
and the opposite end to the .01 mid. condenser mentioned in (3).

The 2nd I. F. Transformer (R) has been superseded by a. transformer which is identified by an
orange dot on the metal bracket. This new coil possesses less turns on the primary, and the spacing
is decreased between the secondary lugs.

The part number of the transformer remains the same.

Effective with current production, Toggle Switch (Interstation Noise Suppres-
sion Circuit) (R), Part No. 42-1036, is superseded by Toggle Switch Part No. 3253,
and two Part No. 9618 leads, in Model 17-123; by Toggle Switch Part No. 3253, one
Port No. 9616 lead and one Part No. 9617 lead, in Model 17-121 and 17-122. The
joint at the switch is protected by two pieces of sleeving. The list price of Switch,
Part No. 3253, is 410 cents.

The following additional list prices should be included in the Replacement Parts list:

on Pm Lin on Pan Lis:
rugs. Description Ne. Prlee - rigs. Dem-lpn" No. Price
(D Wave Blind Switch ................. 42-1035 $0.65 @ Filter Condenser Bank .............. 30-4026 3.00
(R) Antenna Transformer . . .32-1170 .70 (R) Input Transformer ........ . . A32-7057 2.25
(R) Condenser .......... . , .3615-130 .16 (R) Voice Coil and Cone Ammny 136-3061 .75
(R) Condenser (Double).... .7296-13 .16 (R) Resistor (Wire-Wound) ............. 33-3020 .30
0 Tunirg Condenser Assem .31-1041 3.75 (R) Voltage Divider Resistor (Wire-
0 1st Detector Transformer. .32-1171 .70 Wound) ........................ 33-3021 .16
Condenser (Double),..... .3615-AP .18 (R) Condenser (Electrolytic).. .70
(D Compensating Condenser (0sci11ator).04000-R ,35 (R) Potentiometer (Inter-stat
Qc) Compensating Condenser (High Freq.)04000-R ?35 u pressor Circuit) .............. 33-5015 .80
Oscillator Transformer .............. 32-1172 .75 -Volume Control and "Ou-OH" Switch. 33-5013 1.00
$3 Condmser (Double). . . . ,,,,, 8318-0 .18 @ Tone Control ........... 30-4028 ..45
Q 1st I. F. Transformer... _ ..... 32-1173 .75 (R) Filter Choke ...................... 32-7056 1.85
G) 2nd I. F. Transformer.. 32-1174 .60 ' G; Power Transformer (50-60 m) ...... 32-7058 5.00
QD Condenser (Double)..,. ..... 4. .8035-C .16 QD Condenser (Electrolytic) ............ 30-2011 1.25
(B Switch (Toggle); (Inter-s on Noise (R) Condenser (Electrolytic) ............ 30-2011 1.25
Suppressor Circuit) ............. 42-1036 .40

No. on Part Lint
Figures Description No. Price
@ Speaker Field, Assembled with Pot, (0-2) ......... . ............. ,, . . . . 30-3088 $6.75

The following additional list prices should be included in the Replacement Parts list:

(R) Compensating Condenser ............................................... 31-6001 $0.35
Q Compensating Condenser. .. . . . . ......... 31-6000 .40
@ Output Transformer ................ ` ................................... 32-7052 1.50

On page 2 of the Bulletin, at end of the Replacement Parts list, make Electrolytic Condenser (R)

read "No. 6706" instead of No. 6707.

Models 17A-122 and 17A-123
(25 cycle sets)

Effective December 14, 1933, all production on these models will have the first electrolytic con-

denser Q." part No. 30-2014 superseded by part No. 30-2067, no change in connections.

is 8 mid. 5m volt, and No. 30-2067 is 10 mid. 15 volt.)

Please note: we carry a wide range of products which will fulfill the specifications above. Please use our search function or browse our products to find what you need!