Phono Runs on Spring or AC (Dec, 1947)

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
  1. fluffy says: December 16, 20063:17 pm

    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.

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