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Total 6 documents matching your query.

1. [TowerTalk] square vs round booms (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Fri, 10 Mar 2017 11:58:06 -0800; The section modulus of a 4 inch OD x .125 inch wall thickness tube is greater than a 3 inch square boom, also with a .125 inch wall thickness. Both have a 12 inch circumference. The 4 inch OD tube is; /archives//html/Towertalk/2017-03/msg00111.html (8,175 bytes)
2. Re: [TowerTalk] square vs round booms (score: 1): Author: "Bob Shohet, KQ2M" <kq2m@kq2m.com>; Date: Fri, 10 Mar 2017 15:17:33 -0500; With a square boom, you dont have to worry about elements rotating around the boom from the horizontal plane in a severe wind and/or icing situation. Just to keep it in place on a round boom, you nee; /archives//html/Towertalk/2017-03/msg00113.html (9,886 bytes)
3. Re: [TowerTalk] square vs round booms (score: 1): Author: "Peter Voelpel" <dj7ww@t-online.de>; Date: Fri, 10 Mar 2017 22:30:33 +0100; All 49 elements on my KLM antennas hold nicely for more then 30 years with a single band clamp on the round boom. I see problems with the square booms. To get a rigid clamp of elements to the boom la; /archives//html/Towertalk/2017-03/msg00114.html (11,138 bytes)
4. Re: [TowerTalk] square vs round booms (score: 1): Author: "john@kk9a.com" <john@kk9a.com>; Date: Sat, 11 Mar 2017 11:10:32 -0500; My 40m OptiBeams use square bend u-bolts to hole the elements to the boom. I cannot imagine this easily failing and I would think that it is more secure than a single hose clamp which are tricky to t; /archives//html/Towertalk/2017-03/msg00124.html (8,490 bytes)
5. Re: [TowerTalk] square vs round booms (score: 1): Author: Kevin <kstover@ac0h.net>; Date: Sun, 12 Mar 2017 09:50:29 -0500; Optibeam's have been in the field for for how long now? Their multi-band beams have higher surface area (more elements) than most multi-band beams and I haven't heard of huge numbers of elements fall; /archives//html/Towertalk/2017-03/msg00145.html (12,222 bytes)
6. Re: [TowerTalk] square vs round booms (score: 1): Author: "Peter Voelpel" <dj7ww@t-online.de>; Date: Sun, 12 Mar 2017 18:08:50 +0100; I did not write that elements failed or booms broke. I wrote the mechanical attachment to the Boom is not that good because the screws or threads are longer then the boom diameter and small size, you; /archives//html/Towertalk/2017-03/msg00146.html (8,834 bytes)

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