I've had that retuning happen, but I think it's when I get into the mic and flat top or whatever. Maybe too much mic gain...not sure. But it is annoying. ----- Chuck, KE9UW -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-to-KAT500-tp7583270p7583315.html Sent from the Elecraft mailing list archive at Nabble.com.