I just noticed in your post you said that your sweep display looks like
a pocket comb. That's the same information you would get from the PSK31
waterfall I was suggesting.
This is a good indication that your noise source is not random. Probably
from something close by, powered by 120 VAC. It's time to start looking
for that source. Start by pulling all the AC breakers you can in your
house to see if it is generated from within your house. You may have to
use a portable radio and a directional antenna to find it. It could be
a bad insulator on a power pole also.
Jerry, K4SAV
Jim Miller WB5OXQ wrote:
>It seems that from the discussion about v's vs flattop that the flattop may be
>quieter. However when height of support structures becomes an issue is it
>better to use an inverted v with an apex at least a 1/2 wave above the ground
>or a flattop an half that height. I understand that antennas that are too low
>can be cloud warmers so is it feasible to use a flattop that is too low for a
>receive antenna and an inverted v at proper height for a transmit antenna? I
>have 1 tower at 60' in the center of my lot and 2 others at 25' at either side
>of the lot for end supports. The 25' towers are limited in height due to
>power line clearance. The dipole wires lay 150 degrees by 340 degrees. I
>have 2 separate dipoles 2 feet apart fed by separate coax feeds with no baluns
>or chokes for 80 and 40 meters. My noise level usually runs around s 5 on 20
>using a beam at 60' and s9 on 40 on the dipole and s9+10 on 75. the sweep
>display looks like a pocket comb on 75 and not much better on 4
0
> . No weak signals worked here.
>
> Jim & Ella Miller
>WB5OXQ & KA5EPM
> Abby & Sparky
>Dalmatian Furbabies
> Waco, TX
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