We've got the Yaesu FTM-400's with the MARS mod in 2 of our Broncos and they're great radios. The MARS mod is definitely necessary for them to transmit on VHF (Weatherman) and GMRS frequencies. I believe it's also necessary on the OP's radio as well.This is a great setup! Not a radio guy so was curious...
Was the MARS mod needed for the radio to work for this trip? Or are you just a radio guy? I googled the mod and still don't understand if needed to run HAM and GMRS.
Also is the speaker needed because you put the unit inside the dash? Would you need it if mounted in open cab?
Ours are mounted above the glove box and don't have external speakers attached. They're usable, but an external speaker would make them better, I think.
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