To: | <towertalk@contesting.com> |
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Subject: | [TowerTalk] Force 12: rivets, hardware |
From: | jm@drsmesh.com (Joe E. Mesh) |
Date: | 19 Nov 97 03:10 |
>> The result is a strong element that will flex, but not vibrate in light winds, a common problem with most element designs. The solution is to add rope inside the element as a dampener. << The solution to this light wind harmonic vibration is element dampening with enclosed ropes? I have seen this done many times in old Telrex installations I have disassembled. Typically owners installed jute ropes inside the elements of the 20m antennas. I have always wondered if this was actually valuable. The ropes themselves are universally wet and heavy with water content. They tend to move over the years and collect to one end of the element or the other thus greatly upsetting the mechanical static balance of the structure. This has always concerned me. What are your recommendations from your years of experience on this concept of rope inside of elements? Thanks again for the fine advice! Joe / W8SS..... -- Thanks....Joe E. Mesh, D.M.D.,C.A.G.S.(Prosthodontics) from Beautiful Downtown HELL, Michigan USA 11/19/97 03:10 _______________________________________ Always available at: jm@drsmesh.com -or- W8SS@drsmesh.com Please visit our Web Page at: http://www.drsmesh.com --------------------------------------------------------------------- PGP PUBLIC KEY AVAILABLE ON REQUEST -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems: owner-towertalk@contesting.com Search: http://www.contesting.com/km9p/search |
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