[Elecraft] P3 Noise signature

[Bill]

I had problems with non-moving patterns that resembled yours. When you 
tune the VFO, do the peaks move - or are they static and do not move 
when the VFO moves?

If they do not move, replace the BNC patch cable between the P3 and the K3.

I had patterns showing on 75 meters during the day when there should be 
nothing. When I replaced the cable with one of my own craftsmanship - 
the problems went away. Now the P3 works fine.

Bill W2BLC