[TowerTalk] Prop pitch rotates when tower grounded to station

[john at kk9a.com]

Green Heron controllers will not ramp if there is leakage from the motor
to ground.


Re: [TowerTalk] Prop pitch rotates when tower grounded to station
from [Zivney, Terry]	[Permanent Link][Original]
To:	 "towertalk at contesting.com" <towertalk at contesting.com>
Subject:	 Re: [TowerTalk] Prop pitch rotates when tower grounded
to station
From:	 "Zivney, Terry" <00tlzivney at bsu.edu>

I have had  a similar problem - if any of the motor windings have a low
resistance to ground,
turn on.  Looking at the schematic, the output of the power supply is
turned on
by a low
impedance to ground.  I have had my motor repaired twice by Kurt for
this
problem.  As
I understand it from Kurt the same thing happens with the Green Heron
Prop Pitch
Controller.   Notice that  the power supply is grounded through the
power
company
line and hopefully your tower is grounded for lightning.  Even a
thousand ohms
to ground
will cause the problem

Terry N4TZ/9