[time-nuts] 60 Hz line quirks, anybody recognize this stuff?

Poul-Henning Kamp phk at phk.freebsd.dk
Sat Sep 1 20:29:48 UTC 2012


In message <A25619B9FE5144D59D8C1FA34FC4D628 at cyrus>, "Bill Hawkins" writes:

>I agree with others that the power company isn't doing this.

Not only are they not, but it also very obvious that the source is nearby,
since high-frequency components suffer very high damping in the grid.

My guess is an electronically switched motor, likely induction design,
and most likely in your fridge or freezer, but possibly a washer or dryer.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.



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