Worked Vic, K2VCO this morning on 40m CW. His K2/100 was absolutely clean with no clicks and no noise on his CW sidebands while he was running barefoot.
When he ran ran QRO to his Alpha 87A, There were still no clicks, however there was noise on his sidebands extending out +/- about 1 kHz from center frequency. I honestly expected it to be worse than that, but he apparently also has the same problem with the magnetic field from the magnetic field from the HV xfmr in his amp getting into his K2. I was using my IC-756Pro3 with a 50 Hz bandwidth. Tuning off to either side of Vic's CW signal where the tone disappeared, you could still copy him due to the noise on his sidebands. Anyone with a K2 driving a linear amp can easily check for this by listening on a separate receiver using the narrowest bandwidth available by tuning the signal just out of the receiver passband while transmitting on the K2 with amp. It sounds like noisy sidebands on the transmitted CW signal. With my K2, the problem occurs on all bands. It doesn't occur when I use any of my other transceivers (IC-756Pro3, FT-1000MP, TS-830S). 73, de Earl, K6SE _______________________________________________ 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
