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Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024


    Kirt Blattenberger,


RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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Firestone-Stewart-Warner Model R1332 5-Tube Auto Radio

Radio Service Data Sheet
March 1936 Radio-Craft

March 1936 Radio-Craft

March 1936 Radio-Craft Cover - RF Cafe[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Radio-Craft, published 1929 - 1953. All copyrights are hereby acknowledged.

Firestone-Stewart-Warner Model R1332 5-Tube Auto Radio Radio Service Data Sheet

(Power supply protective resistor; calibrated dial; tone control.)

The chart at the left shows the locations of the tubes and their voltages, as measured to chassis. The usual high-resistance meter must be used. The bias on V4, of -23 V., is measured from chassis to the ungrounded filter choke terminal.

Firestone-Stewart-Warner Model R1332 5-Tube Auto Radio Radio Service Data Sheet, March 1936 Radio-Craft - RF Cafe

With the volume control set at maximum, attach the service oscillator between V1 grid cap and chassis, and adjust all I.F. trimmers for best signal. R.F. alignment is made at 1,400 kc., the adjustment being made on the trimmer located nearest the shaft end of the gang condenser.

The dial calibration may be corrected by tuning to a station of known frequency around the center of the dial and, while holding the knob so that it cannot turn, set the pointer to the correct position. The screw that controls the pointer is at the rear of the control head, and may be turned by an ordinary small screwdriver.

The special "globar" protective resistor across the secondary of the power transformer cannot be tested with an ordinary ohmmeter since it will have a resistance of several megohms when cold.



Posted July 13, 2015

Radio Service Data Sheets

These schematics, tuning instructions, and other data are reproduced from my collection of vintage radio and electronics magazines. As back in the era, similar schematic and service info was available for purchase from sources such as SAMS Photofacts, but these printings were a no-cost bonus for readers. There are 227 Radio Service Data Sheets as of December 28, 2020.

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