Thanks, Mike - As to your latter point, I think this qualifies as line
noise because it is present all across 10, 15 and 20, just at much lower
amplitude except on 15, but it certainly could be a resonance thing.
73, Pete N4ZR
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On 10/3/2021 8:04 PM, Mike Martin wrote:
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, 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?
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