December 16, 2006

Phono Runs on Spring or AC (Dec, 1947)

Filed under: Cool, Useful — @ 9:49 am
Source: Popular Science ( More articles from this issue )
Issue: Dec, 1947
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Phono Runs on Spring or AC
One drawback to the production of AC-DC-battery phonograph portables has been the lack of motors that would operate anywhere. Capitol Records, Inc., of Hollywood, combines an AC motor and a spring-drive mechanism with a three-way amplifier to get a truly portable record player.

1 Comment »

This must predate wall-warts. These days, the way you make a dual-mode motor is by taking a DC motor and putting some sort of AC->DC adaptor on it.

Comment by fluffy — December 16, 2006 @ 3:17 pm

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December 16, 2006

Phono Runs on Spring or AC (Dec, 1947)

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