I have a problem trying to key a "homebrew" amplifier with my K2 (S/N 5251). I am using the two-transistor T/R circuit from the "Mods" web page, and the T/R relay pulls in as expected, however there is an annoying "thump" in the received audio when the T/R returns to the receive state. I am using the separate receive antenna (Rx) input. If I disconnect the receive antenna line from the amp, there is no thump. If I trigger the T/R relay driver circuit manually, there is no thump. It seems that there is some interaction between the receiver unmuting and the T/R relay going to the "receive" state simultaneously that causes this thump. Any experience or ideas?
Thanks, Bill Stewart WU0R _______________________________________________ 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
