Amplifier T/R Keying problem
Posted by
William Stewart-2 on
Jan 28, 2006; 11:33pm
URL: http://elecraft.85.s1.nabble.com/Amplifier-T-R-Keying-problem-tp386093.html
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:
[hidden email]
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.htmElecraft web page:
http://www.elecraft.com