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About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

Webmaster:

    Kirt Blattenberger,

    BSEE - KB3UON

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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Radiolas "Super VIII" (AR-810, "Semi-Portable" (AR-812), 24 and 26

Radio Service Data Sheet
June 1930 Radio-Craft

June 1930 Radio-Craft

June 1930 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.

These four Radiola superheterodynes use the same 6-tube catacomb, the first of this type put on the market by the Radio Corporation of America; differences lie in the mechanical arrangement of the units outside the catacomb, and in the electrical and artistic design. The "812," to which most of this material specially applies, is an entirely self-contained semi-portable table cabinet set with a battery compartment at each end. The A.F. output is obtained at a jack; a plug-operated switch changes the circuit from one A.F. to two. Another switch controls the "A" circuit. There is a master rheostat ("Battery Setting"), R3 in the diagram on this page, and also a vernier rheostat ("Volume Control") R2; the latter controls I.F. amplifier V3.

Radiolas "Super VIII" (AR-810, "Semi-Portable" (AR-812), 24 and 26

Radiolas "Super VIII" (AR-810, "Semi-Portable" (AR-812), 24 and 26 Radio Service Data Sheet, June 1930 Radio-Craft - RF Cafe

 

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

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