This is not true in the USA. See http://www.fcc.gov/Bureaus/Engineering_Technology/Documents/cfr/1998/47cfr15.pdf. For the FM broadcast band, see section 15.239. I seem to recall that a transmitter with less than 100mw radiated power satisfies these requirements. Correct me if I'm wrong.Ravi said:Any kind of transmitter, either AM or FM, needs license form authorities to operate. Anticipating that you have proper authority, you may brows through the Electronic Projects of this forum where you find a simple FM transmitter shematic with two transistors and part list.