Rich I have had this issue one time only... May be RFI, don't know. Wiring is clean and simple. 73, Laurent F6DEX ----- Laurent F6DEX -- View this message in context: http://elecraft.365791.n2.nabble.com/KRC2-FIRMWARE-FAILURE-tp6296211p6299493.html Sent from the Elecraft mailing list archive at Nabble.com.