Jim, KL7CC wrote: "So, maybe the problem [hum getting into the K2's PLL] could be worth another look, as in maybe there is another way to solve it? Could something be done to the K2 itself to make it immune to this problem?" ========== Hum coupling from the K2's power supply xfmr is not much of a problem because separation of a couple of feet eliminates it.
Hum coupling from a linear amp's hypersil HV xfmr is another story, however. Six feet is not sufficient distance from my Alpha 76CA. Ditto when my K2 was tried more than six feet from my friend's Alpha 99. Thirty feet separation does clear up the problem, but that is unacceptable. I am a QRO operator who chases DX and works the contests, so I cannot use my K2 for this purpose because of the trashy signal it puts out when used with an amplifier. Elecraft is aware of the problem and was going to investigate further into it, but that was perhaps a year ago. They were going to look into the possibility of fabricating a mu metal shield, but I have heard nothing back from them since. If no fix becomes evident soon, I'm afraid my K2/100 will be up for sale. 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