[amsat-bb] AlphaSpid Green Heron rotor controller PstRotator

[Kevin]

I do not own one but looking at the documentation for the controller I 
noticed this,
"gradual startup and shutdown of rotor power to reduce stress on towers, 
antennas and rotors. This is achieved by pulse-width-modulating the 
operating voltage for the rotor."

That could very well be the source of the "beeping"  with the windings 
in the motor singing.

73
Kevin WA7FWF

On 3/26/2020 17:47, Jeff via AMSAT-BB wrote:
> Green Heron R-21 controller