RCPilet, Thanks for the knowledgeable advice. I just read your post on PCM from 3/20/06 about the antenna mounting.

In my Edge 540 I have been having "Rudder Flutter" for two weeks. I have changed everything(one at a time). Different RX, TX, Battery, Switch,different freq,servos, leads,crystals and wound the 24" leads. Still had the problem except with a PCM RX. Which I felt only masked the problem, I wanted to know why??. On Saturday I tried another RX and the antenna was outside the fuse, rather than down the internal tube which runs it to the tail containing 3 servos and parallel to 9 wires and comes out the bottom and contacts a metal plate that holds the horizontal stab wires. I went back to my RX and if the antenna is in the tube I have the Flutter. If I take it out behind the cockpit to the Vertical stab. no problem. No matter how I arrange a tube in the fuse. to the tail I get the interference so outside it stays!!!

This is the first plane I have that has three servos in the tail so it's the first time I've had this problem. It now make perfect sense.

Thanks again for your advise. I think the FM Rx is the way to go for what I am flying at this time. Check My Planes on My profile page.