Detrola Models 571A, 571B Schematic & Parts List
January 1947 Radio News

January 1947 Radio News

January 1947 Radio & Television News Cover - RF Cafe Website

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Wax nostalgic about and learn from the history of early electronics. See articles from Radio & Television News, published 1919-1959. All copyrights hereby acknowledged.

Magazines usually provided at least a brief description on the circuit functionality for each of the radio models presented in schematic format. The January 1947 issue of Radio News published schematics and parts lists for six sets, including this for the Detrola models 571A, 571B, but not a word about any of them accompanied it. The thumbnail image is from an eBay auction, and more info can be found on the RadioMuseum.org website. These are posted as part of my ongoing effort to make the information available to those who repair and/or restore vintage vacuum tube radio sets. Services like SAMS Photofact®, which began operation in 1946, is still an excellent source of the most detailed data available.

The Circuit Page banner, January 1949 Radio News - RF Cafe Website

Posted February 17, 2017

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.

Innovative Power Products (IPP) Baluns & Transformers - RF Cafe Website

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 tying up your telephone line, and a lady's voice announced "You've Got Mail" when a new message arrived...