Antenna: Description and Operation

CIRCUIT 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 through the DK GRN wire to the Antenna Motor. The other motor terminal is grounded through the Up Switch, the GRY wire, and the Relay contacts. The motor drives the Antenna Mast up. At the end of its travel, the Up Switch opens and the motor stops.

When the Radio or Ignition Switch is turned to OFF, the circuit through the Antenna Relay coil is opened. The contacts open to the position shown in the schematic applying battery voltage to the WHT wire. The DK GRN wire is now grounded, reversing the motor's polarity. Since the Down Switch in the Antenna Motor is now making contact with the WHT wire, the motor runs in the opposite direction and drives the Antenna Mast down.

Once the Antenna Mast is fully down, the Down Switch opens and breaks the current flow. Both sets of switches are now in the positions shown in the schematic, Radio OFF and Antenna Mast down.

The Antenna Mast is connected to the Radio by a coaxial cable.