A power supply supplies the transmitter with the correct DC
voltage, typically either 12-14 volts or 28 volts. The power supply
transforms AC wall voltage into the correct DC voltage. Electrical
capacity of the power supply is measured in amps. Be certain that the
power supply has enough capacity for the transmitter being used. You
can use a 12 volt lead acid battery for portable set-ups or connect
directy to an automotive electrical system through the cigarette
lighter socket.
An antenna’s
purpose is to radiate
the FM broadcast signal from the
transmitter to surrounding FM radio
receivers. In order to do this the antenna must first be tunded to the
frequency being transmitted. You will need a SWR meter to tune it, but
we will get to that later. Secondly, the antenna must be sited and
oriented properly.
