Mark can you put a dummy load on the radio to reduce the
radius it will transmit when you get in close. We use to do that with ham
radios and CB's years ago it acted like you cut the power in half. That way
people in close could hear you but farther out they could not. Im not real
sure how this was done but a good Ham Raidio tech could tell you in a flash.
Call radio shack a place that has Ham radio stuff they will be able to tell
you what to do. I had a ham set set up like that and it worked at the flip
of a switch worked just great. Just a thought :) Eric Kelsheimer