I feel quite foolish ..but really cannot understand the instructions. "If you have a Elecraft K3, KX3 or a K3 twin setup, connected via a CAT cable from COM2 " ..What does this mean? Do you mean the K3 should be connected to the COM2 socket on the RRC 1258 Control Unit (normally not in the shack) ? The remote Radio unit only has a COM1 plug on it. My K3 is linked to COM2 on my PC. I there any chance that I could have a small join-up diagram? I am reallty quite confused. Thanks for the help.