I did this and tapping the 3 key does nothing. I tapped the 1 key and it toggles 500y & 500n ? Tex ka5y -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-KAT500-Synchronization-tp7596110p7596167.html Sent from the Elecraft mailing list archive at Nabble.com.