Here is a dual conversion receiver:
http://www2.towerhobbies.com/cgi-bin...&I=LXCXM8&P=ML
Here is what a loaded whip antenna looks like:
http://www.horizonhobby.com/Shop/ByC...ProdID=RVO1010
If your interference happens in the future the other thing you can rally do is like the heli eat itself or get your hands in their and shut it off.
Bevo