[time-nuts] OXCO Spurious Output at Line Frequencies
phk at phk.freebsd.dk
Wed Jul 13 04:18:07 EDT 2016
In message <8BDE1988-7C6B-4A20-9CBC-927CD8E85A2F at n1k.org>, Bob Camp writes:
>Simply running test gear on batteries did not do the job. Ultimately we
>wound up in the middle of an Illinois corn field with a bunch of gear
>modified to run purely on batteries. The spur did go down, but it never
>fully went away.
Illinois is not going to be particular quiet place in that respect.
There are a lot of very big antennae all over the civilized world,
in the form of power transmission lines, and they radiate when their
phase-loading is not perfectly balanced.
As antennas they're horribly inefficient, the wavelengths are
five and six thousand kilometers, but they do have the advantage of
the the biggest transmitters in the world, and they are all phase
synchronized in rather large geographies.
Dome C on Antartica is probably your best bet these days, provided
you get far enough away from the gensets.
PS: I've heard from several sources a saga about when South Africa
inaugurated the worlds longest high-voltage line, from hydropower
at the north of the country to consumers a the south, and very
little power came out at the far end. The punch linie being that
orbiting space-craft suffered a lot of 50Hz field strength while
they debugged that issue.
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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