RE: AR 500 receiver
the ar500 has a second ailon input /aux channel and all mixing you can need
the ar6001 limit is about 300meters on test with plane about meter off ground
the ar500 work at least half mile ( i crashed that far out )
on the ar500 the long antenna make the end of it go 90 degree to the short one
and ar6200 if you can see it you got signal
just remember to have the rubber duck on tx pointing straight up to sky
but yer great peice of kit