[time-nuts] OXCO Spurious Output at Line Frequencies
Hal Murray
hmurray at megapathdsl.net
Wed Jul 13 00:24:04 UTC 2016
kb8tq at n1k.org said:
> All of those motors in the building are rotating at line frequency. You
> donât just have an electromagnetic field. You can have an acoustic /
> vibration field as well. Probably not a big deal, but itâs there â¦.
Most of the medium sized motors run at slightly below line rate, and often at
half of line rate. I'm thinking of the classic squirrel cage induction motor
vs a synchronous motor. A quick google search found 1725 and 1750 RPM.
Is it possible to measure things accurately enough to notice that?
--
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