HOW TO – Make a low power FM transmitter

Rod writes “It is designed to use an input from another sound source (such as a guitar or microphone), and transmits on the commercial FM band – it is actually quite powerful, so make sure that you select an unused position on the dial! The FM band is 88 to 108MHz, but is getting fairly crowded nearly everywhere, but you should be able to find a blank spot on the dial somewhere. “ – Link.