RE: Radio interference issues
here is something contrary though... (this is with my SINGLE CONVERSION foamy) anytime I have that out flying, I have to make sure to keep my transmitter closer then the people around me. (need to be on the end of the flightline!) if i cross in front of anyone else and their tx ends up closer, it usually just locks out the receiver and down the plane goes. This is HIGHLY repeatable, and I've noticed it happens with frequencie up to around 10-15 channels away.
i'm speculating it is just front end overload in the rx, as I'm usually flying the foamy fairly close in anyway. ANY tx can be screwed up by enough RF bombarding it, doesn't really even matter if the frequency is close or not.