Like so many threads, this one took on an extended life, sweeping up
of related topics. Bill, W7VP provided an extended analysis of the
structure, which was quite thorough.
One area, though, (below) raised a question in my mind:
> One thing I have done with my own tower is to build a triangular
> which is attached at the base plate of the rotator. The bracket is
> to the tower legs so that each leg of the bracket is attached to
> two legs of
> the tower. This give a longer moment arm for the guys to pick up the
> rotational moments of the antenna system. Even better would be to
> create a
> "Y" in the guys near the top so that the moment from the rotator is
> up at an angle on the base thus increasing the effectiveness of the
> guys in
> resisting rotational moments.
For those of us with Rohn towers, wouldn't use of their torque arm
make sense? Amateurs tend to simply drop preform loops over tower
legs, as we go up,
but the torque bar assemblies make for a much more rigid system.
reason they were designed is precisely that described by Bill.
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