I'm now leaning more to a connector problem (either the direct wire or the connector box (shown in a prev post)) coupled with a possible duplexer problem. I've swapped btwn 2 cords and the connector box, all combinations of 6 different radios (from 2 different man'f), high side/low side connections on the duplexer, antenna combinations, frequency pairs, etc. I can still get a receive and transmit using either the cords or the connector box (this box only works with H3's) when not connected to the duplexer.
Using the connector box, the transmit radio does key up on today's trials but it doesn't stay in transmit long enough to actually say anything.
I am still open to new thoughts or ideas and will give it some more thought over the weekend. I don't have an issue hooking things up and doing some basic troubleshooting, but I'm out of my element and don't have the tools to troubleshoot much further.