Radio & Sidetone

I have a Series 5 with a 912ULS. I have had radio noise problems but recently have solved all but one. When transmitting the side tone is very noisey. I am told by unicoms and other planes in the pattern that my transmissions are loud and clear. I have an Icom A200 with a PS PM501 intercom. I use noise canceling headset and have added an Oregan Aero mic muff. This seems to help. I have gone thru all my grounding. I installed a Icom A210 in an RV-9A and it has internal menu to ajust sidetone, etc. ,but the A200 does not. Any ideas or suggestions appreciated.

This may or may not help your situation but has worked wonders for others.
http://www.icomamerica.com/en/suppor...ber=64ja571413

the ferrite coil things cost less than $5.00 each and like I say it has worked great for other guys.

Thanks for the heads up , GB. I couldn't find the parts from Icom dealers and finally called Icom direct and ordered them. Will let you know if it solves the problem.

Update. Installed the Ferrite cores on the headsets and all worked well. Thanks.

Being an Engineer, I agree with the idea of adding ferrite beads. On one of the Defense Projects I am working on we just recently added ferrite beeds to resolve a video signal issue. When I worked on the TI Laptops we did the same on the cables going from the Video Processor to the display. I have always been amazed at how much better the circuit performas after adding a ferrite bead.