My other (2nd) K3 is in #4600 range. Any thoughts? Do you have KSYN3As installed in this unit? 73, Bill W4ZV -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Weird-Intermittent-Problem-tp7602116p7602126.html Sent from the Elecraft mailing list archive at Nabble.com.