Antenna: Description and Operation

When the radio is turned "ON," voltage is applied to the antenna relay coil. The antenna relay contacts close, and battery voltage is supplied to the antenna motor. The other motor terminal is grounded through the antenna motor "UP" switch, and the antenna relay contacts. The motor drives the antenna up. At the end of its travel, the "Up" switch opens and the motor stops.

When the radio or ignition switch is turned "OFF," battery voltage is removed from the antenna relay coil. The contacts open, applying battery voltage to the WHT wire.

The DK ORN wire is now grounded. Since the "DN" switch at the antenna is now mailing contact with the WHT wire, the voltage to the motor has reversed polarity. It runs in the opposite direction and drives the antenna down. At the end of its travel, the "DN" switch opens the circuit.

The antenna is connected to the radio by RG-62 type coaxial cable.