Today, after curing a ground problem with the antenna end connector, we were able to transmit on frequencies from 127 to 136. So we know the wiring is ok, but the radio won't transmit from 118 to just below 127. According to another case, the radio is not at fault and the solution is to upgrade the cable and re-crimp. So this will be the next step.

Any suggestions are welcome.
RMM