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November 1935 Radio-Craft
 [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.
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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 magazine. "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. Tuning into the audio portion of television broadcasts was
a big deal as well. Although not as popular today, there are still a few adherents
remaining.
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.
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