Dave, The K3 does not tell the KAT500 what frequency it is on. It only tells what band it is on and the KAT500 returns to the last frequency on the band. Keith -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-to-KAT500-tp7583270p7583401.html Sent from the Elecraft mailing list archive at Nabble.com.