Hi John Let me try tomorrow and report back, I have never tested this. Henk, PA3GUO Has anyone on the list tried using a Kenwood TS2000 on full duplex satellite operatation using a dualband VHF/UHF antenna and a diplexer? Is it possible or is there too much desensitization thru the diplexer to make full duplex work? 73s John AA5JG