I would like to ask the group's wisdom, what (if any) regulations govern this subject. I know that there exists a plethora of low power FM transmitters for iPods, baby surveillance, even hands free phone kits (for car use). What is the allowed maximum input power for these ? I am talking maybe 2 meters of range vs. a reasonably sensitive state of the art FM receiver. I.e. probably 10uV into 50 ohms at 2 meters (since this is near field one cannot apply the usual equations I think). Peter P. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist