FYI: K3 WORKS FINE WITH DOS & CT 10.03 CONTEST PROGRAM. SETUP YOUR COMPORT, COMTSR# -B4800 BAUD AND USE TS940 AS THE TRANSCEIVER. DON'T FORGET SETUP AS COMPORT# RADIO1 4800. K3 KEYS JUST FINE WITH CT INTERFACES. ALEX W2OX/V47KP