deglestal

The BNC wasn't the problem, it was the 30 pin molex connector into the back of the radio. Factory built 06 model and had other electrical crimping faults as well (not radio related). When I first read your post it sounded just like my issues

Roscoe. I had some similar intermittent tx issues with my J230 and Icom a200. Long time spent checking radio, coax, antenna, audio panel wiring. Eventually found the crimping on the Molex terminals were poor/loose. Soldered them and been OK since. (I hope its more than a coincidence.)