Pete,
I should mention I tracked down another 'dull thud' kind of line-rate
locked broadband noise on 160 meters (and slightly above 160)
to a residence about 3900 feet to my NNE ... suspect this is some
sort of electronic device and not a HV arc source ... but,one never
knows.
I have to make another run and get a better bearing to a specific
residence, then decide how to approach the owners, who may be
Asian given the language I heard while pedaling down the alley
on the bicycle while doing a 'survey' run with the Coastal Nav
receiver.
This will mark the first time I have tracked down a line-rate locked
'noise' to a residence on 160m. I have previously tracked down
'wandering carriers' to three different geographically located
'sources' at residences about 4 or 5 years back. These were most
likely wire/wireless 'dog fences' that had spurious 'wandering
carrier' (unsteady tone, NOT raspy) emissions. Such a signal
would likely have not had any 'signature' at VHF to allow it's
easy tracking and locating. Power line sources, actual arcs,
generate a fair amount of 'noise' higher in frequency given
the dynamics of the arc (the rate at which it 'fires' and
extinguishes, the rate-of-rise/rise time, etc.)
73, de AA5CT
.
. On Sunday, January 26, 2020, 8:57:03 PM CST, N4ZR <n4zr@comcast.net>
wrote:
Recently, I have experienced constant S8 line noise on 160 meters. I've
killed the power in my house and run the radio on batteries, with no
change, so it's nothing inside. When I drive down the road a couple
hundred yards away, which has a 3-phase powerline on one side, with my
car radio tuned to 1710 KHz, the noise is almost deafening, with
definite peaks at certain poles, as well as intermittent snapping and
crackling noises that really suggest something loose or broken..
However, today I went out with my homebrew VHF aircraft band Moxon,
hoping to narrow down the noise-maker(s) to particular poles, and to my
surprise I could not hear anything comparable to what I heard at 1.7 MHz.
Any suggestions about how I might go about tracking down the source or
sources? The local power company guy is very willing, but does not have
much training to go on.
--
73, Pete N4ZR
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