Hi Larry,
Thanks so much for your time... I'm going to rewire one of my
countryman emw mics to the mini plug connector and try it - I have
another one that I'll leave with the five pin on. I'll be able to
test the 400b next to the um400, going into the same receiver and both
rigged with emws that have been field tested. If there's still a
difference I'll see if the dealer has another tx that I can try.

cheers,
Brent C

ps what's the difference between the 400b and c?