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Total 11 documents matching your query.

1. [TowerTalk] Tension on tramline (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Sun, 04 Apr 2004 09:47:03 -0400; I was talking the other day with a local antenna guy about tramming. I mentioned reading various cautionary tales on towertalk about masts getting bent as a result of the tension on tramlines when re; /archives//html/Towertalk/2004-04/msg00024.html (8,029 bytes)
2. Re: [TowerTalk] Tension on tramline (score: 1): Author: W0UN -- John Brosnahan <shr@swtexas.net>; Date: Sun, 04 Apr 2004 09:33:35 -0500; The math is not simple for a catenary with a suspended load. You get a lot of mental exercise doing hyperbolic sines and cosines. You can search on catenary, tension, suspension, etc and get lots of; /archives//html/Towertalk/2004-04/msg00026.html (10,471 bytes)
3. RE: [TowerTalk] Tension on tramline (score: 1): Author: "David Robbins K1TTT" <k1ttt@arrl.net>; Date: Sun, 4 Apr 2004 15:08:21 -0000; I have an old article about this from the yccc newsletter for oct 1994. unfortunately this one hasn't been converted and put on our web site yet. I will try to get this scanned and put on my web site; /archives//html/Towertalk/2004-04/msg00027.html (13,384 bytes)
4. Re: [TowerTalk] Tension on tramline (score: 1): Author: <sabrams@nycap.rr.com>; Date: Sun, 4 Apr 2004 11:09:06 -0400; Pete, It is my understanding that a catenary is used to raise antennas over obstructions, like trees, houses, guywires, other antennas, etc. If the cantenary line is so slack as to be almost vertical; /archives//html/Towertalk/2004-04/msg00028.html (12,870 bytes)
5. Re: [TowerTalk] Tension on tramline (score: 1): Author: "Jim Lux" <jimlux@earthlink.net>; Date: Sun, 4 Apr 2004 08:22:04 -0700; They're all cases of catenary curves, and a bit of googling will find a lot of detail Try http://home.earthlink.net/~w6rmk/math/catenary.htm for some equations which might help. getting antennas weig; /archives//html/Towertalk/2004-04/msg00029.html (10,420 bytes)
6. RE: [TowerTalk] Tension on tramline (score: 1): Author: "Howard Klein" <howk2@hotmail.com>; Date: Sun, 04 Apr 2004 16:07:33 +0000; David, I am plannng the raising of an 90# antenna on a 32 foot boom to 82 feet on a self supporting tower. The hitch is I have a similar antenna at 40 ft. necessitating a tramline to pass the lower a; /archives//html/Towertalk/2004-04/msg00031.html (11,766 bytes)
7. Re: [TowerTalk] Tension on tramline (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Sun, 04 Apr 2004 12:52:20 -0400; At 11:09 AM 4/4/04, K2XA wrote: It is my understanding that a catenary is used to raise antennas over obstructions, like trees, houses, guywires, other antennas, etc. If the cantenary line is so slac; /archives//html/Towertalk/2004-04/msg00032.html (8,509 bytes)
8. RE: [TowerTalk] Tension on tramline (score: 1): Author: Tony King - W4ZT <towertalk@w4zt.com>; Date: Sun, 04 Apr 2004 14:47:37 -0400; Howard, Have you considered rotating the boom of the lower antenna so you have the elements vertical, giving you a clear 180 degrees to lift the second antenna straight up the side? 73, Tony W4ZT At; /archives//html/Towertalk/2004-04/msg00033.html (8,697 bytes)
9. [TowerTalk] tension on tramline (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Sun, 04 Apr 2004 14:55:09 -0400; Thanks to K1TTT for coming up with information that is precisely on point. I was startled (not that I should necessarily have been, but I was) by the amount of downforce on the rotator that can easil; /archives//html/Towertalk/2004-04/msg00034.html (8,258 bytes)
10. Re: [TowerTalk] Tension on tramline (score: 1): Author: <sabrams@nycap.rr.com>; Date: Sun, 4 Apr 2004 15:04:04 -0400; David, There is an easier way to raise the antenna. Raise the antenna straight up the tower so that the elements are vertical and the boom is perpendicular to the boom of the fixed antenna. Bring it; /archives//html/Towertalk/2004-04/msg00035.html (13,817 bytes)
11. Re: [TowerTalk] Tension on tramline (score: 1): Author: "Tower (K8RI)" <tower@rogerhalstead.com>; Date: Sun, 4 Apr 2004 17:14:15 -0400; You took the words right out of my mouth. I was just getting ready to post the same thing. <:-)) We took everything up the side of the tower from the TH5 to 7 L 6 Meter C3i, to the completely assembl; /archives//html/Towertalk/2004-04/msg00036.html (10,087 bytes)

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