Hi Stan, I also have problems with noise being generated from my Red system but mostly see it on 75 meters where I operate. My Blue system which was at my home tore up most of 40 meters and segments of 75 meters. I tried everything from ferrites to grounding to shielded cables to power supplies and was never able to get rid of it. I did find that if I used freeze spray on both the Red and the Blue boards that I could move the interference up and down the band which told me that it is being generated internally within the systems. At this point I gave up and took my Blue system and set it up in the arrowhead of Minnesota at a friends cabin where it plays nicely away from my ham radio gear at home and the Red is at my cabin in northern Wisconsin where I don't operate my ham gear very often. I to would like to someday figure out a way to get rid of it.
Steve (KE9LZ)