Date: Sun, 1 Apr 2018 00:23:15 -0400 (EDT) From: donov...@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 _________________ Topband Reflector Archives - http://www.contesting.com/_topband