Definition – An FM Translator is a system which contains a receiver which receives an FM broadcast signal, transfers its program to a second transmitter and transmits this program at a second frequency.

Purpose – The objective of a translator may be to provide coverage in an area which has marginal signal from the originating station. This may be caused by shielding from hills or buildings. A second objective could be to extend the coverage range of an existing station.

Equipment – A typical translator system will consist of the following basic equipments.

a) A high gain Yagi Antenna – This antenna is used to receive the originating stations.

b) A sensitive FM receiver with a multiplex output.

c) An FM Broadcast Transmitter with an output power consistent with the desired coverage at the 2nd frequency. It should also contain facilities to achieve timely “station identification”.

d) An FM Broadcast Antenna with appropriate gain to meet the desired coverage.

e) Transmission Line for connecting the receiving antenna to the receiver and line to connect the transmitting antenna to the translator transmitter.


a) Line Surge Protector to protect equipment from power line surges.

b) Polyphasor Coax Protector which protects transmitter and receiver from lightning.

c) FSK Keyer which is used to identify the station with a “Morse Key” message.

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