Stromberg-Carlson No. 69, 4-Tube All-Wave Superhet. Selector (Converter) Radio Service Data Sheet
January 1935 Radio-Craft

January 1935 Radio-Craft

[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.

Radio Service Data Sheets were published by various electronics trade magazines back in the early to middle decades of the last century. SAMS Photofact document sets were published on just about every appliance made, and those had much more detail than these briefs. However, for the low-budget repair shop or the do-it-yourselfer, the Radio Service Data Sheets were a godsend. I have been scanning, cleaning up, and posting all the ones I find in my vintage electronics magazine collection. See a complete list at the bottom.

Many fine examples of restored vintage radios can be found on the Internet. The Stromberg-Carlson No. 69 shown above appears on the RadioMuseum.com website. See also Tom Bavis' AudioPhool.com website for an extensive collection of Stromberg-Carlson photos, datasheets and Sam's Photofacts files.

Stromberg-Carlson No. 69 4-Tube All-Wave Superhet. Selector (Converter)

The manner of connecting the combination inverted-L and doublet antenna system recommended for use with this ·type of short-wave converter is described in Part II of the article, "Important Facts About the New All- Wave Antenna Systems," (RADIO-CRAFT, August 1934, p 84); note Fig. 7 in the article.

Position A of the range switch establishes a straight-through connection from the an-tenna to the standard broadcast, 200 to 550 meter receiver with which the selector or converter is being operated. The output of the selector, at· 545 kc., is fed through a grounded shield; one output lead connects to the antenna post of the set, and the other connects to the ground post.

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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 255 Radio Service Data Sheets as of April 30, 2025.

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