Sounds like the problem I had with my K2 on 80 meters, I tracked it down to rf getting into my Astron 12A power supply. It only did it on 80 and 160 and running the K2 into a dummy load did not correct the problem. The problem would show up with the K2 running as low as 4 Watts. The power supply was setup below my steel operating desk. Tried a number of things to cure it and finally tried another power supply, a Tripp Lite 7 Amp supply cured the problem. I have since put a line filter on the input to the Astron 12A and an output filter and reduced the problem of rf getting into the Astron supply, but not completely cured it. The Trip Lite supply looks similar into the design as the Astron, yet it is not susceptible to rf.
By the way I use a Astron 20A to run my KPA 100 with no problems and it also ran the K2 with no problems. I now use the Astron 20A for the KPA 100 and the Trip Lite for the K2 and the KAT100 with no problems. I recently tried some additional filtering (ferrite choke) on the Astron 12A and still have problems with it. Guess I will use the Astron 12A for some other stuff where it will not be subject to rf. 72, Steve Ray K4JPN ex K1VKW EM82ep Warner Robins GA Elecraft K2 1422 & KPA-100 Heath Fan HW-101, HW-8 http://www.thewinstonator.com/k4jpn.htm _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
