evan, it is true, they are different types of radio waves. The pcm while not infallible is much more discerning and will reject more bad signals than the non pcm. I am not trying to start a flame war here but as other people have stated there is a difference. I have had problems that went away with the a pcm set up. I have at least 18 pcm rx in my fleet. I have a few non pcm's in the foamys but other than that they all get pcm. Its a free world and this is just my opinion, no offense meant to anyone.