Hi, Could it be a second RX? with output mixable with the audio signal from the main K2 and controlled over the KIO or the internal Aux bus. Or could it be a Elecraft Dipmeter, or an antenna-analyzer? So many wishes ;-) 72 Wolf, DL2WRJ K2 #2857, K1 #1136 -- Old programmers never die. They just branch to a new address. (/usr/games/fortunes)