I have found power line noise sources on 160 all the way out to 5 miles.
Here's a list of some of the more notable sources found over the last decade or
so:
https://powerlinenoiseallentexas.wordpress.com/
One of them not listed was on a co-op power pole that had a bad lightning
arrester and was 5 miles out to my NE.
HERE'S what I successfully use, time and TIME again:
https://powerlinenoiseallentexas.wordpress.com/df-equipment/
Good luck in the hunt.
de AA5CT
.
. On Tuesday, January 7, 2020, 10:55:25 PM CST, Kenny Silverman
<kenny.k2kw@gmail.com> wrote:
Hi and thanks in advance!
We’ve been trying to track down some noise at a friends house but no luck so
far and I was hoping for some tips on finding it. The buzz comes on at sundown
and turns off at sunrise. It’s bad on 160 but it can be heard Lightly on 80 and
40. The noise is constant and does not cycle (at least for the 90 minutes I
was listening to it tonight). The worst direction is on the East beverage on
160. On 80m it seemed like the worst was to the NW... it could be 2 sources
but the noise appears to come on at the same time in all directions, not a
staggered turn on/off. Could be a single source but poor F/B on the beverages.
The Listening to the ARRL RFI files it sounds like power line noise or street
lamps ( but without the cycling). Over the 90 minutes tonight there were
almost no variations (except for an occasional change in pitch).
We've DF’d on a portable AM radio, 2m and ultrasonic device. AM identified some
noisy poles but we’re not convinced these are the main offenders. Not much
luck with VHF or ultrasonic. Our next plan is to use a KX3 on 160m and a
decent RX loop to direction find and triangulate.
I suspect we’re not looking out far enough... suggestions on how far away we
should be looking? And how close do we need to be to hear it on VHF?
Besides power lines and street lamps, other thoughts on possible offenders?
Most of the area is residential with street lamps on most streets.
Regards , Kenny K2KW
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