How are you going to put a duplex channel in the DTRs' ie. make the DTR rx on channel 1 and tx on channel 12 with just a PTT, for the portables in use on the farm?
How are you going to put a duplex channel in the DTRs' ie. make the DTR rx on channel 1 and tx on channel 12 with just a PTT, for the portables in use on the farm?