Eliminating RF Hum in A.M. Transmitters and Receivers.

Demonstration and cause of hum on radio transmitters and how to cure it. Use of an RF immune power supply and choosing the correct location for the transmitter and radio are essential for any part 15 broadcaster who wants to get the most out an am transmitter. Of course moving the receiver will not alter the transmission, but it can be placed where mains induced hum "cancels out" leaving a hum free reception.