Right forgot to say...this is on the 4K serial numbered K3 with all options included. ----- Chuck, KE9UW -- View this message in context: http://elecraft.365791.n2.nabble.com/New-Firmware-k3fw5r57-Causes-Odd-Sound-tp7627264p7627267.html Sent from the Elecraft mailing list archive at Nabble.com.