This article is from the Low Power Broadcasting FAQ, by Rick Harrison raredata@geocities.com with numerous contributions by others.
For a radio station, you will need audio sources (tape players, CD
players, microphones, etc.), an audio mixer, a transmitter, a coaxial
cable (usually RG-8 or RG-58/U) to carry the signal from your
transmitter to your antenna, and an antenna.
A piece of equipment called a compressor/limiter is also very
important. It reduces the level of sudden loud sounds so that they
don't over-drive the transmitter, and brings up the volume of quiet
sounds so that people riding in cars and listening in other noisy
environments can hear them. Radio stations that operate without a
compressor/limiter sound very amateurish and run a higher risk of
interfering with stations on nearby frequencies.
For television, you also will need video sources (cameras, videotape
players, character generators, etc.) and a video switcher.
 
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