I have limited experience. I have an SV27 that was delivered with an AM radio (RTR = usually low end). The system was prone to glitching. The concensus was to use an FM system to eliminate this. Maybe the higer end AM systems are just as good. I know they are use on planes in come cases. That's all I have on this. There is a thread on SV27 radios that covered this in detail, it's probably buried deep now but you could look at it. I didn't mean to scare you.