Also many hydro-electiric dams put out 25 hz.in the
"olden days"
73
STEVEN GRANT W4IIV
--- Larry Molitor <w7iuv@earthlink.net> wrote:
>
> Downtown Chicago was one such place. Many elevators
> in the "loop" still ran
> on 25 Hz until sometime in the sixties. I remember
> seeing, at the power
> station where my father worked, the huge
> motor-generator that was used to
> convert the locally generated 60 Hz to 25 Hz for
> distribution to select
> customers. The conversion from 25 Hz to 60 Hz for
> "consumers" was done
> before I arrived on the scene.
>
> Larry - W7IUV
>
> At 09:27 AM 4/9/01 -0400, Bob Duckworth wrote:
>
> >Have a receiver here and power supply is marked
> 25Hz. USA made for USA
> >market.
> >Who knows when and where in USA 25Hz was so common
> that 'consumer
> >electronics'
> >was manufactured to operate on it.
> >
> >-bob
> >
> >--
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>
>
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