The AR-40 is for large FM-TV and compact communication antenna arrays up to 3 square feet wind load area. Dual 12 ball bearing race is exclusive to its class. Automatic position sensor never needs resetting.
 

Fully automatic control -- just dial and touch for any desired location. Solid state, low voltage control, safe and silent operation. It has a maximum mast size of 2 1/16 inches. Includes MSLD light duty lower mast support. Operates at 110V.