Model AR-10 Antenna Rotor is designed to support and rotate television antennas and provide control and direction indication at a remote point. AR-10, in its basic configuration, (without mast adapters or thrust bearings) is recommended for any antenna which can be mounted directly to the stub shaft protruding from the top of the unit. Ideal service can be obtained from one of the current (up to seven or eight element) YAG or log periodic "in-line" antennas in suburban service with the antenna mounted directly to the stub shaft as shown in Figure 1. These antennas will normally be rated by the manufacturer for service up to 50 to 75 miles. If it is desired to mount a larger antenna such as a longer in-line type with cross braces, a die cast adapter is available, list price $2.00 part number AOO-50461-00, which fastens to the shaft of the rotor and to a mast. The mast may then be used to attach larger antennas. When it is desired that a particularly secure installation be achieved, a thrust bearing, part number TA-6, list price $3.30, may also be used. The thrust bearing is recommended for installation of larger antennas, when two antennas are used or in high wind areas. Exceptional service may be obtained from the heavy duty CDR rotors AR-22R automatic and TR-2C manual. The heavy duty rotors are recommended when fop performance, large stacked arrays are desired or when high wind loads are encountered.