ORIGINAL: topfuel4430
I ranged checked it a few times on the ground with no problems, unfortunately the engine wasnt running... However, I taxied quite a bit at a fairly large distance also with no problems, as soon as it hit the air the last time, it started going crazy, no matter what speed the engine was running.
I would try having someone restrain the plane and range check with the engine running at different rpms..If the range check with the engine running is good and you only get the RFI while in the air then like Bill suggested it could be some vibration..Check any lock nuts that come in contact with any metal parts..I started getting some RFI on a plane out of nowhere..turns out the lock nuts that held the gear on were slightly loose and were vibrating against the aluminum gear plate..
Cant tell from your pics but put some foam under the ignition also