Detrol Model 302 Radio Clock (1939)
Detrola Model 302 Radio Clock (1939)
Detrola ..the big name in little radios.                                                  ...a grand gift for office or home.
This very collectible model 302 radio clock from Detrola was
introduced in the second half of 1939 for the 1940 season.
According to an advertisement I found in a Dec 1939
Oakland, CA newspaper, it was offered for sale for $24.95
at that time in Western regions. As was customary, it would
have cost slightly less than this in the East.
Detrola Radio Clock
A dependable radio and an equally dependable,
nationally-known self-starting synchronous
clock combined in one unit...a grand gift for
office or home. 5 Tubes Super-heterodyne
receiver. No aerial no ground required.
Automatic Volume Control.
The radio is a 5-tube ac/dc-  
powered All-American-Five
superhet covering the
standard broadcast band.
The tube line-up is 12A8GT
(mixer/LO),12K7GT (IF amp),
12Q7GT (2nd det/AVC/1st
AF), 35L6GT (AF power
amp) and 35Z4GT (rectifier).
Detrola 302 Rear view, showing antenna loop housing.
schematic
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Back at the time when this set was offered for sale, some regions of the country received a direct current (DC) electricity supply rather than
the alternating current (AC) that is standard today. Many radios were therefore designed to operate with either type and the Detrola 302 was
no exception. Its synchronous clock, however, would only function using AC and so Detrola provided a slider switch at the rear of the set to
allow the clock to be turned off whenever the unit was supplied with DC! I cannot help but wonder how many buyers of this set who lived in
areas having DC mains ended up disappointed upon finding out that their smart new purchase, with its very prominent front clock-face, would
never show them the time!
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