Hello Don,
When I was younger, and my knees were better, I helped out the locals with
tower maintenance services.
I found that people who did NOT "Pin" the mast pipe to the rotor
occasionally had problems with mast orientation slippage.
I also found that people who did "Pin" the mast pipe to the rotor
frequently had torn up the gears in the rotor. ( usually resulting in the
mast/antenna array "freewheeling" which would tear up the rotor loop cables
and antenna feedpoints. )
It is a whole lot easier and way less expensive to re-align the antenna
direction after a windstorm than replacing the rotor, rotor loop, feed
point attachment, etc. ( did you ever notice all the "rotor rebuilding
services" out there? )
73
Lloyd - N9LB
On Sun, Jul 30, 2023 at 12:24 PM Donald Fox via VHFcontesting <
vhfcontesting@contesting.com> wrote:
> Along with the new towers here at the new QTH, I've upgraded from Ham 3 to
> Tailtwister rotors. You might recall that the smaller Ham/CDE rotors had a
> threaded hole and bolt in the center of the clamping plate to help keep the
> mast pipe from turning independently of the rotor.
>
> The TT has a hole for a 3/8s ish bolt to "pin" the the mast. I had not
> done that, thinking it would not be an issue with the larger clamp
> hardware. We have some pretty good winds here, and the MP does not want to
> stay put! I do crank on the SS clamps a fair amount, but am concerned about
> stretching/galling them. We all know what a mess that is, especially 40
> feet in the air.
>
> Feedback from TT users and what you experienced are appreciated. Feel free
> to reply directly if you wish.
>
> TIA
>
> Don N8ECH
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