Hi. Someone gave me a KPC3+, without manual, to connect to a Motorola Mitrek radio. I think that there is a problem in the PTT. When I issue a connect command via the computer, I see the PTT LED working in the KPC-3, but no TX from the radio. Tried two Mitreks and two Mitrek-to-Kantronics cables. Any suggestions appreciated. Thanks, Jay Coote Los Angeles AAR9QM/W6CJ