[Elecraft] Change in the P3 noise floor

[Larry K1UO]

A question for you "Tekkies".  Today, for the first time I can recall, I
widened the P3 span to the full 200K bandwidth display. While listening on
aux receive antennas for 160 meters, I could see a half moon shaped noise
floor that started gradually rising from S0 at about 1.775Mhz, peaking
around S3 at about 1.830 and slowly declining again until back to S0 level
at around 1.875Mhz  (A nice even arc of noise).

Would this be noise from my series fed 115ft top loaded 160/80M xmit tower
that I am seeing?  I have a vacuum relay that disconnects the feed /radials
from the tower when receiving and I didnt see much if any difference when
switching the relay in and out manually.

curious now as to what I am seeing.

Thanks,
Larry  K1UO

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