> John...one of the best ways to 'track' these noise sources is with an
> ordinary AM transistor portable, with a built-in ferrite bar antenna.
By far, the best way to localize a source such as this is with a VHF receiver
listening
in AM mode. These signals will propagate a long distance, sometimes measured
in miles, on
HF and the broadcast band and will often give false DF readings since they're
re-radiating
from other conductors. I've found several offending doorbell transformers in my
neighborhood this way. I would drive around listening on 20 or 40 meters until
I
identified an area (roughly within one square block) where it was averaging
louder than
the rest of the area. Then with my FT-817 tuned to the aviation band or two
meters (AM
mode) the receiver was quiet until I got within a hundred feet or so of the
offending
house. I pin-pointed it every time this way.
Dennis
NØSP
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