Stromberg-Carlson 500 Engineering Data

ENGINEERING DATA
STROMBERG-CARLSON NO. 500 AC-DC RADIO RECEIVERS
STROMBERG-CARLSON TELEPHONE MANUFACTURING COMPANY
ROCHESTER, NEW YORK
IDENTIFICATION TABLE
Model Input Power Frequency Chassis
Cabinet Speaker
500-H Blue 25-60 Cycles AC (or DC) 31674
31806 31696
500-H Brown 25-60 Cycles AC (or DC) 31985 32812
31976
500-H Silver 25-60 Cycles AC (or DC) 31674 32813
31976
500-H Ivory 25-60 Cycles AC (or DC) 31985
32814
31976
500-J 25-60 Cycles AC (or DC) 31985
31981 31696
500-S 25-60 Cycles AC (or DC) 31985
32026 31696
SPECIFICATIONS
Voltage Rating_
Type of Circuit_
Tuning Range-
Number and type of tubes-—6
1—12SK7 R. F. Amplifier
1—12SA7 Modulator and Oscillator
1—12SK7 I. F. Amplifier
Input Power Rating_
Intermediate Frequency_
P. M. Speaker Voice Coil Impedance at 400 Cycles
-105-125 Volts
-Superheterodyne
-.54 to 1.65 Megacycles
1—12SQ7 Demodulator, AVC and Audio
1—35L6GT Output
1—35Z5GT Rectifier
-30 Watts
-455 Kilocycles
-Approximately 3.5 Ohms
FEATURES
This is a six tube superheterodyne receiver designed
for operation on either DC or AC current (105 to 125
Volts). A loop antenna is built in so that no antenna
or ground connections whatsoever are required. How¬
ever an antenna terminal is provided on the back of
the loop assembly so that the set can be used with a
regular antenna (a single wire about 75 feet long
should be most satisfactory).
An automatic volume control circuit is used in this
receiver and tone is adjusted by a step tone control.
ACCESSORIES
PLAYING RECORDS. Any Stromberg-Carlson Rec¬
ord Player can be attached to this receiver by using a
P-30647 phono adapter.
HEADSET ATTACHMENT. Headphones can be very
simply attached to this receiver. Ask for P-28303
Headset Package Assembly that comes complete with
headphones and installation instructions.
CARE OF THE CABINET—500-J AND S. The finish
of Stromberg-Carlson Cabinets should be protected by
using Stromberg-Carlson cabinet polish regularly. It
ADJUSTING
To adjust the dial lamp simply push the pilot lamp
and socket forward until maximum illumination of
is available in pint cans designated as P-28601.
Nicks and scratches of most kinds can be repaired
quickly and easily by proper use of the P-26962
Touch-Up Kit. Complete instructions are provided
with each kit.
CARE OF THE CABINET—500-H. The plastic cabi¬
nets of the 500-H Models are of enduring construction
but they must be handled with great care to prevent
breakage; it is not practical to attempt repairs. A
replacement cabinet is available at a nominal cost.
(See Replacement Parts on Page 4.)
DIAL LAMP
the dial is obtained.
FRONT LOOKING AT INSIDE
BOTTOM OF CHASSIS
12SQ7
OSC._
1.4 MC.
ANT_
I.4MC.
VARIABLE
CAP
Location Chart
ALIGNING INFORMATION
Never realign unless absolutely necessary.
Use a good modulated signal generator (test oscilla¬
tor) with variable output voltage and a sensitive out¬
put meter across the voice coil of the speaker.
Always align using the smallest possible input from
the signal generator. A strong signal makes adjust¬
ments inaccurate.
Always have the volue control "full on".
Important: Be sure the metal plate is fastened in place
on the bottom of the chassis before alignment is at¬
tempted.
ALIGNING PROCEDURE (follow this order exactly).
I. Dial Pointer Adjustment.
P-32418 Issue 1 Printed in U. S. A.