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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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Atwater Kent Model 649 All-Wave 9 Metal Tube Superheterodyne
Radio Service Data Sheet
November 1935 Radio-Craft

November 1935 Radio-Craft

November 1935 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.

For more than a decade, I have been posting these Radio Service Data Sheets for radios and various other audio and visual electronics sets that appeared in vintage electronics magazines. This one for the Atwater Kent Model 649 all-wave, 9 metal tube, superheterodyne console radio set was published in the November 1935 issue of Radio Craft. "All-Wave" radios were popular at the time because they provided access to shortwave bands so listeners could tune in foreign broadband stations - often with the rudimentary built-in antenna. Short Wave Listening was actually a worldwide sport that had its own cadre of enthusiastic participants, including a dedicated magazine entitled Short Wave Listener. Although not as popular today, there are still a few adherents remaining today.

Atwater Kent Model 649 All-Wave 9 Metal Tube Superhet. Set

The airplane dial of this set changes illumination as the bands are shifted. Both halves are lighted on the broadcast band. the upper half on the S.-W. band, and the lower half on the police band. The tuning ratio is 60-to-1 on the high position. The selectivity control makes possible true high-fidelity when in the low selectivity position. In addition, a 4-position tone control is used. Correct tuning is shown. by observing the shadow tuning meter, which is operated by the plate current of V2 and V3. The set draws 120 W. from the line. The range switch has 3 sections, each of which changes 3 separate circuits.

Atwater Kent Model 649 All-Wave 9 Metal Tube Superhet. Set Radio Service Data Sheet, November 1935 Radio-Craft - RF Cafe - RF Cafe

 

 

Posted December 14, 2016

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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