Kirk Brimmer, I'm glad that some of the more seasoned flyer's jumped in and helped with my answer to the switch placement. I stand corrected about the ignition switch. When I mentioned the switch isolated noise to the battery from the ignition, I was incorrect because just as you pointed out, the switch being in the closed, or "off" position will only stop noise when it's in the off position. What Silversurfer and TKG, says is correct. But, the use of a PCM receiver does make a difference in eliminating noise. Not just from the ignition, but also from any other RF noise that may be emitted by the "linkage," or servos. As Silversurfer said, "The placement of the receiver antenna" is very critical because it is receptive to "radio frequency" types of emissions. We should always route and exit the antenna as far away from any other wires in our aircraft as we possibly can. If you do a search on these threads, you'll find that almost everyone who flys "Giant" Gasser's, use PCM receivers. One last suggestion. Always use the brass bushings in your servo grommets. They protect against over-tightning of the servos, which can cause noise if they are mounted too rigidly. I've only been flying the "Big" ones for about 5 years so I, like you still have a lot to learn. Good luck with your project.