Couple of things that will change a noise from what's considered normal. The
source of the noise or where the noise is radiating from to get to your antenna
could be in a position that allows it to arrive at your antenna at a null in
the wavelength for that particular frequency that it isn't received and arrive
at the peak of the wavelength on another frequency. This is very common and I
see this almost daily. The other situation is the noise that you think is line
noise, which is always broadband in nature, may not be a line noise and maybe
something that does not radiate or transmit at other frequencies.
Be safe,
Mike Martin
RFI Services
51 W Bay Front Rd
Lothian, MD 20711
240-508-3760
On Oct 3, 2021, 4:01 PM, at 4:01 PM, Pete Smith N4ZR <pete.n4zr@gmail.com>
wrote:
>This is a bit of a puzzle, to me anyway. With my tribander pointed in
>one direction (west), I have extremely bad what sounds like line
>noise.
>This noise is not audible on 20 meters, on 10 meters, or on lower bands
>
>using my Carolina Windom. I won't be able to get out and try to DF it
>for 10 days or so, but I always thought line noise got progressively
>worse as you went down in frequency toward its fundamental. What am I
>missing, or what should I be looking for?
>
>--
>73, Pete N4ZR
>Check out the new Reverse Beacon Network
>web server at <http://beta.reversebeacon.net>.
>For spots, please use your favorite
>"retail" DX cluster.
>
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