I am almost overwhelmed by all the very thoughtful suggestions. Here's what I know so far.
I had previously performed the idea of turning off all items in the room except for the radio and P3, but the reported symptom remains. I then switched my antenna switch to the grounded position, and the problem goes away......... Now my suspicion is that my rfi is created from outside my house. My antenna system consists of two end fed long wires, 90% opposed to each other, and a minimal vertical out behind the house. The RFI from all antennas is approximately equal in amplitude as I select them one at a time (with the vertical slightly less but I attribute that to the relative poor receive sensitivity on that antenna. Nonetheless, the RFI on that antenna is quite noticeable. I hesitate to bother for additional thoughts at this point, at least until I can asses what possible causes external to my house might be at play, and now to pay close attention to whether or not it changes depending on the hour of the day. For example, at first notice of this problem I sensed that everything was normal until for example, the beginning of the work day. I soon discounted that thought however, when I realized it was happening late at night (as was the case up until I shut down last night around 11pm). And it affects only 20 Meters. All other bands are viewed normally. Perhaps once I can capture and submit a picture for review here, someone might be able to make a little more sense out of what I'm trying to describe.........If I can say it this way, it reminds me of a TV commercial where folks are in a Gymnasium doing a strength regimen involving holding a rope in each hand and making it serpentine by moving the arms up and down. Only that sine wave of baseline noise moves from S-2 to as high as S-7 when using my best antenna.......... I'll try to get a picture attached later this afternoon. Thanks for the help so far. Mike, K5MP -- Sent from: http://elecraft.365791.n2.nabble.com/ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
