> The manual says that the cable from the KIO2 to the serial > port should have the ground braid connected only at the rig end. Vick, remember that the shield is on pin-1. Pin-5, the signal ground, is still connected at both ends. I'd just leave the K2's shield unconnected at the switch box end per the instructions. That way you don't have any ground currents flowing in the K2 shield.