> Now for the noise. I found the keyed relay objectionably noisy in
> "full QSK" mode. It would not be useable in any 36 hour contest stint
> IMHO.
> It is audible in the next room (the bedroom). Mr. Clinton indicated
> that the vacuum relay is the primary source and nothing can be done
> about it. "QSK is noisy"
Brian and the group,
Rich AG6K has a pretty darn good solution to the noisey relay problem. I
believe he mounts the relay on a silicon foundation which cuts down on the
noise quite a bit. He did this do his SB-220 and TL-922 amps. I recommend
you contact him at measures@vc.net for help. I installed his QSK circuit to
an L4B many moons ago and did just that and it sure worked great. The vacuum
relays do work very well for full QSK and are easy and cheap to replace if
the need arises.
73s
Lane
Ku7i
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