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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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Exodus Advanced Communications Best in Class RF Amplifier SSPAs

General Electric Model 250 Schematic & Parts List
January 1947 Radio News Article

January 1947 Radio News

January 1947 Radio & Television News Cover - RF Cafe

[Table of Contents]

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 General Electric model 250, but not a word about any of them accompanied it. One thumbnail image is the SAMS Photofact from an eBay auction, and the photo thumbnail is from the RadioMuseum.org website. I also find a YouTube video of a nicely restored GE model 250 radio 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.

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

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 227 Radio Service Data Sheets as of December 28, 2020.

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General Electric Model 250 Schematic & Parts ListJanuary 1947 Radio News Article

General Electric Model 250 Schematic & Parts List
January 1947 Radio News Article