Carrier current is a method of low power AM radio transmission that uses the AC electrical system of a building to propagate a medium frequency AM signal to a relatively small area, such as a building or a group of buildings. In the United States, carrier current stations do not require a broadcasting license from the FCC, as long as the emissions adhere to the Part 15 Rules for unlicensed transmissions.
Read more about Carrier Current: Application, European Broadcasters, Community Radio, Student-run Carrier Current or Cable Cast Stations
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