Dries: Thanks to you and the others for answering.
I am using a power supply from a Raspberry Pi ( 1 A). Unfortunately, I cannot find my old AM radio to snoop with. I put some ferrites on the line from the power supply, but that did nothing. My probe is in the same room as the controller. I could locate it up in the attic, but the temperature there can get to 120F quite often with high humidity, and I don't know if the amplifier can handle those conditions. I know that the system is working, as yesterday there were a lot of T-storms crossing the state, and I was on the maps showing activity. I am running Automatic, and the HP settings (visible only an Manual mode) are all OFF.
I did order a new PS from PowerStream, so that may make a difference. Attached is a screen grab from Signal Tools Vin. Not only are there all of those "spikes" (which change in amplitude, but are always there) but the signal itself jumps around.
Again, Thank you...Steve
Stations: 1964