Hy-Gain HDR-300A Conversion, pt2

 The previous blog demonstrated the ability of this satellite dish elevation controller to be converted to a 360° azimuth rotator controller. 

I mapped the HDR-300A wiring to the rear receptacle, changed the receptacle to screw-type terminal strips, installed a pot for "zero" calibration, and tested this setup on another HD-73 rotator motor. So far, so good! Here's a few pics and video...

First, I mapped the various terminals and their function...

Here, I made a chart of the internal wiring colors to the output connector, and their function.

I installed a 300 ohm pot for "zero" position calibration...

Down below is the output connector location, when it was removed.

I installed to terminal blocks...a small block for feedback pot connections, and a larger block for the higher current motor and brake connections.

I mapped the original Alliance rotor controller connections and their motor functions.

More mapping the old vs. new controller cross reference...

Feedback pot not yet connected, while sorting the motor control functions.

The gearmotor and feedback pot assy from the Alliance HD-73 antenna rotator.

The motor run capacitor that must be used, the HyGain controller originally connected to a basic ac motor that required no capacitor.