Side view of the
The ALFA SPID rotator is a medium to heavy duty antenna rotator,
It is priced well under these and other competing rotators. Mechanical complexity is reduced to a minimum with the utilization of a simple double worm gear drive system.
Position readout ( azimuth ) is sensed by a completely sealed magnetic reed switch.
The controller has a full complement of features, including digital readout of heading.
Rotating torque is in the 1400 to more than 3200 inch/pound range, with between 12 and 24 volts DC supplied to the motor. Torque measured at 24 volts was 3,240 in/lb. This is significantly more than any other rotator in the same price range, and even higher than some rotators costing nearly twice as much ( Yaesu 2800 or Orion 2800 )
Top section removed
A top view of the rotator