The K3S is connected using the Elecraft RS232P3 cable and in the P3, the radio selected is the K3 and the RS232 speed is 38400 baud. I believe the cable is working OK as I am connecting from the P3 RS232 port to my PC at 38400 for CAT control in my logger. Any other ideas please? 73 Ray G3XLG Sent from Mail for Windows 10