Patrick,
I use the small prop pitch from K7NV to turn my 140' 55g rotating
tower. Hasn't missed a beat in over 2 years since installing it.
Great piece of work.
The prop pitch will actually move in either direction when not powered
up under high wind conditions. I like that feature as it keeps the
stress off the entire system. If it does move under these conditions I
just take a quick heading with my IPhone compass and reset the Green
Heron controller that Kurt has W2FU make for the prop pitches.
Rich - N5ZC
On 12/9/2017 8:37 AM, Patrick Greenlee wrote:
Kurt Andress, K7NV, pretty much tells it like it is whether or not his
audience chooses to believe reports from his experience and
knowledge. He does a fine job re-purposing prop pitch motors as
antenna rotators. His engineering and workmanship (and anyone he subs
to) are of the highest quality as evidenced by an examination of one
of his rotators. He told me his smaller model is more than sufficient
to handle a SteppIR DB42. It is one gutsy unit. The motor isn't
turning unless energized. High ratio worm drive "automatically" locks
the output when the motor is not powered. No brake needed, no brake to
wear, slip, or fail.
Many of his customers started out trying to find a good bargain price
rotator. Their sad tales of woe are rife here and on other social
media. Eventually, after multiple failed attempts to get 10 lbs of
"STUFF" into a 5 lb bag they ante up and get one of his or other truly
stout units.
The true bargain approach is to buy his unit first and save the money,
time, effort, and grief of trying to "overstuff the bag" with units
that fail.
My congratulations to all of you who are getting good results with
re-purposed light duty TV rotors, hamsters on treadmills, or whatever.
The above does not apply to you.
Patrick NJ5G
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