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I always thought that equipment designed to work on 25 hz would be just loafing along on 60 hz...the transformers are bigger with more iron and there would be more filtering. Personally I don't see any point to using a power oscillator to generate 25 hz.
An Atwater-Kent radio shouldn't draw more than 1 to 1 1/2 amps off the power line.
I think if you use equipment designed for a higher frequency on a lower one, say 60 hz equipment on 50 hz, or especially 400 hz equipment on 60 hz, that the transformers are smaller and lighter and couldn't dissipate the heat well enough.
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