Date: Sun, 1 Apr 2018 00:23:15 -0400 (EDT)
From: donovanf@starpower.net
To: topband@contesting.com
Subject: Re: Topband: 160m polarization and elevation angles
www.arrl.org/news/storm-takes-down-amateur-radio-contest-club-towers-in-northern-europe
## Per the OH8X current website, they still have several towers up. They
think the
rotating 300 ft tower that came crashing down in a windstorm, was caused by a
failure
of the auto mechanism, that auto orients the 5 el 80m yagi, and the 3 el 160M
yagi below it,
in high winds http://www.radioarcala.com
## The idea was to orient the yagis, such that minimum torque was applied to
the tower itself.
Basicly, the tower twisted itself apart. The issue with the rotating towers
is, the tower is free
to twist all it wants. The guy wires terminate on the huge guy rings, not the
tower itself. Think
of it as a 300 ft long drive shaft, fixed at the bottom end, and free to
twist at the top end. It
wound up like a pretzel.
Jim VE7RF
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