Skywca,

I wouldn't have believed it without seeing it for myself: Your aluminum foil trick works great!!

I did not wrap the wires, just the receiver. I tried both a Sombra and an FMA M5; both are dual conversion. I cut a 12"x12" square of Clingwrap (plastic wrap) and repeatedly folded it onto itself, 2" wide, until I got a 2"x12" 6-ply plastic strip. I wrapped this around the receiver twice and cut off the remainder; I used small pieces of Scotch tape to close the pinched off ends of this plastic cover; the servo leads come out the end closest to the receiver's servo connector, and the antenna comes out the other end, i.e., no external wires running through the inside of the wrap and across the receiver circuitry. This plastic insulated any exposed metal surfaces on the receiver assembly. I then wrapped the receiver with three layers of aluminum foil. The combined foil and plastic add little weight and eliminate all the interference. I didn't use the ferrite bead; it actually weighed more than this solution. I experimented with various distances between the ESC and receiver; it didn't seem to matter but why temp fate: I would recommend as much separation as possible between the wrapped rcvr and any high power components, e.g., ESC, motor. A little troubleshooting before adding this shield indicated that the problem was definitely an ESC>>-->receiver issue; I did not investigate the potential effect of RF motor noise.

My hypothesis: I'm assuming this works because the foil creates a Faraday Cage (http://www.mos.org/sln/toe/glossary.html#faradaycage) around the receiver. This is similar to the Theater of Electricity at the Museum of Science in Boston (http://www.mos.org/sln/toe/). The Theater operator is safely inside a Faraday Cage that is being struck by huge static sparks generated by a giant Van de Graaff generator (http://www.mos.org/sln/toe/cage.html). [I realize I'm making a leap of faith between high voltage static sparks and RF noise; I'll research the details of an electromagnetic wave radiating an ungrounded metal cavity. ]