[TowerTalk] PST61 Rotor Reliability?
rthorne at rthorne.net
Sat Dec 9 09:50:42 EST 2017
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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