"In general, ALC between an amp and a rig is a recipe for clicks and splatter. Most authorities advise against using it. This is not new -- it's in the manual for Ten Tec legal limit amps from the late '70s and for every amp I've owned since."
The OP has a KPA500 and K3S interconnect by an Elecraft AUX cable. This means that ALC is connected (Aux cable pin 15) and opens the possibility that it is not configured correctly. What I don't know is whether incorrectly configured ALC could cause the reported problem. I suspect that would depend on the time constant(s) of the ALC loop. 73, Andy, k3wyc ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com