This article is from the Low Power Broadcasting FAQ, by Rick Harrison email@example.com with numerous contributions by others.
Some individuals and small groups operate low power radio or
TV stations as a hobby, or as a way of spreading some commercial,
religious or political message. Some volunteer groups operate
unlicensed stations with a "public access" format, allowing
virtually anyone to get on the air for an hour or two each week
and broadcast any sort of material that they feel passionate about.
Unlicensed stations are known by such terms as "free radio" and
"micropower broadcasting." Some of them operate within the legal
guidelines for unlicensed stations, while others use a bit more
power than the rules allow.