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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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Atwater Kent Model 776 6-Tube Auto Radio

Radio Service Data Sheet
June 1936 Radio-Craft

June 1936 Radio-Craft

June 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.

Atwater Kent Model 776 Automobile Radio - RF CafeThe thumbnail image of the Atwater Kent Model 776 Automobile Radio is from the AtwaterKentRadio.com website. You can see from the picture that the entire radio was contained in a single chassis, unlike many models of the day that had the bulky RF electronics mounted behind the dashboard or under a seat, and the listener interface controls mounted separately in the dashboard. Below is the Radio Service Data Sheet as it appeared in a 1936 issue of Radio-Craft magazine. It was one of six such documents that appeared.

Atwater Kent Model 776 6-Tube Auto Radio

Radio Service Data Sheet

Atwater Kent Model 776 6-Tube Auto Radio Radio Service Data Sheet, June 1936 Radio-Craft - RF CafeTone control; illuminated remote control; noise suppression; A.V.C.

In early sets, the upper of V4 is 5,000 ohms with a voltage drop of4 V. and the lower is 15,000 ohms with a drop of 10 V. In late sets, as shown, resistors   are 10,000 ohms each, with a total drop of 12 V. Early sets also had a 0.1-meg. plate resistor for V4 with a drop of 55 V., making plate voltage 125 V. Voltage is much lower with the 0.25-meg. resistor shown. Early models do not have a tone control and the "A" filter circuit is slightly different than shown.· The bypass condenser on the pilot light is 0.2-mf.



Posted June 20, 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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