I have one and use it with a Kenwood THF6a on a mobile node. At first I
couldn't get transmit audio. I contacted Advance Repeater Systems. They
were really good. We went through the radio tune menu proceedure
and saved the settings. It just so happened, the problem had nothing to
do with the adapter. My THF6a has a flaky external Mic. They caught it
other wise I probably would have missed that. Now when I set up, I have to be
absolutely sure the connector is seated and not move the radio. In the radio
tune menu I set my audio levels at 500 then use the internal adjustments in
the adaptor to fine tune the audio. Works really well.