I tried to put a poll out there on this, but using a phone, it won't let me do it. I think it would be interesting to get everyone's opinions on mobile mics. Astatic d104m6, road devil, RF limited ceramic 577 or telex 56?
The RD is a noise canceling mic which helps with road noise. I would still take a 575 over the RD but you do need to watch the background noise with it.
IMO no one needs a power mic unless their radio is undermodulated or an old junker, or completely stock, and then only sometimes.
most times they just overload the first mic amp in the radio causing you to have to turn the gain down to compensate.
LC