Nick The easiest connection is a line from J5 to an 1/8" audio socket on the rear panel. This is how my k2 is set up to work with the Microham MicroKeyer. Bob KD8CGH KX1, K2, K3, ... -- View this message in context: http://www.nabble.com/K2-and-data-modes-tp15406823p15415744.html Sent from the Elecraft mailing list archive at Nabble.com.