Antenna: Description and Operation

When the Radio is turned "ON," voltage is applied from the Radio (CKT 314) to the Power Antenna Assembly's Internal Relay Coil. The relay contacts close, and battery voltage is applied to the Power Antenna Motor. Motor terminal "B" is grounded through the UP Switch and the relay contacts. The Motor drives the Antenna Mast up. When the Antenna is at its full height, the UP Switch opens and the Motor stops.

When the Radio or Ignition Switch is turned "OFF," voltage is removed from the Relay Coil. The relay contacts open, applying battery voltage to the Motor. The Motor terminal "A" is now grounded. The DOWN Switch at the Antenna now has voltage applied through the relay, the voltage to the motor has reversed polarity. It runs in the opposite direction, retracting the Antenna Mast.

At the end of the Antenna's travel, the DOWN Switch opens and breaks the current flow. Both sets of switches ate now in the places shown in the schematic, the Radio is "OFF" and the Antenna Mast is down.

The Antenna is connected to the Radio by coaxial cable.