[Elecraft] P3 Double-humped Noise Monster

I am really happy I added the P3 to my K3. It is my window on the band. I can't imagine operating without it. I have had the P3 for six months now, but just recently it has started to display two big ugly humps of noise that drift across the display. This happens on all bands, but it might not

Re: [Elecraft] P3 Double-humped Noise Monster

Hi Roger, summer here, winter there I guess ... When I first got my P3, I had a similar observation. Periodically, but with no specific periodicity, the baseline would drift upward. Putting my hand on the top of the case sent it down. At some point, I had the scan at 200 KHz and realized

Re: [Elecraft] P3 Double-humped Noise Monster

Hi Roger, I had something similar with my P3. After cleaning the internal metal to metal contact points on the case, my problem disappeared. Good bonding (and tight screws) on all enclosure panels is essential. I also had another problem with wandering spikes on the display. It turns out my BNC