Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Aluminum\s+mast\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Aluminum\s+mast\s*$/: 41 ]

Total 41 documents matching your query.

21. Re: [TowerTalk] Aluminum mast (score: 1): Author: doc <kd4e@verizon.net>; Date: Wed, 15 Mar 2006 11:21:14 -0600; Unless or until the tube takes a blow which compromises its relatively thin (compared to the rod) thickness -- it is less likely to resist the impact thus denting and becoming more prone to collapse; /archives//html/Towertalk/2006-03/msg00294.html (7,706 bytes)
22. Re: [TowerTalk] Aluminum mast (score: 1): Author: ersmar@comcast.net; Date: Wed, 15 Mar 2006 17:09:24 +0000; TT: I believe the article to which Jim refers can be found in NCJ Jan/Feb 1992, which itself is a reprint of two articles by Stan W7NI from the Sept/Oct 1982 and March/April 1983 (ancient history!) N; /archives//html/Towertalk/2006-03/msg00296.html (7,971 bytes)
23. Re: [TowerTalk] Aluminum mast (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Wed, 15 Mar 2006 10:06:51 -0800; Sure, any defect causes a stress concentration. And, any BIG dent changes the size of the tube, which changes its strength (because everything hangs off that radius of the member term) It would also; /archives//html/Towertalk/2006-03/msg00297.html (8,193 bytes)
24. Re: [TowerTalk] Aluminum mast (score: 1): Author: "Bruce Ferratt" <uglyatc@msn.com>; Date: Wed, 15 Mar 2006 15:47:09 -0500; BobHello. My mast is 1 1/4" OD. It is solid, round. It states on the side ASTM 6061-T6511. It is 12ft long and will be mounted 4-5ft inside my Rohn 25g tower to the rotor plate with a thrust bearing; /archives//html/Towertalk/2006-03/msg00301.html (10,715 bytes)
25. Re: [TowerTalk] Aluminum mast (score: 1): Author: "Bruce Ferratt" <uglyatc@msn.com>; Date: Wed, 15 Mar 2006 15:49:13 -0500; DocHello. My mast is 1 1/4" OD. It is solid, round. It states on the side of the mast ASTM 6061-T6511. It is 12ft long and will be mounted 4-5ft inside my Rohn 25g tower to the rotor plate with a thr; /archives//html/Towertalk/2006-03/msg00302.html (10,288 bytes)
26. Re: [TowerTalk] Aluminum mast (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Wed, 15 Mar 2006 13:56:13 -0800; So, you can apply a bit of simple mechanics.. bending stress is =Moment/section modulus Section modulus for a solid rod is pi/32 * D^3 or 0.19 inch^3 for your rod. Yield for 6061 aluminum is probably; /archives//html/Towertalk/2006-03/msg00306.html (8,421 bytes)
27. Re: [TowerTalk] Aluminum mast (score: 1): Author: "Bruce Ferratt" <uglyatc@msn.com>; Date: Wed, 15 Mar 2006 16:17:01 -0500; DaveThanks for the email. The mast was $66. It is ASTM 6061-T6511 grade aluminum at 1 1/4" OD, SOLID, not hollow. The weight of the aluminum was less than the 6ft steel mast that came with the tower.; /archives//html/Towertalk/2006-03/msg00312.html (9,993 bytes)
28. Re: [TowerTalk] Aluminum mast (score: 1): Author: "Bruce Ferratt" <uglyatc@msn.com>; Date: Wed, 15 Mar 2006 16:31:17 -0500; JimThanks for your email. The mast is 1 1/4" OD. Solid, round. Side writing on the states it is ASTM 6061-T6511 grade aluminum. It was $66. Weighs about the same as the seet 6' mast that came with th; /archives//html/Towertalk/2006-03/msg00314.html (10,421 bytes)
29. Re: [TowerTalk] Aluminum mast (score: 1): Author: "Bruce Ferratt" <uglyatc@msn.com>; Date: Wed, 15 Mar 2006 16:33:27 -0500; RichThanks for your email. The mast is 1 1/4" OD. Solid, round. Side writing on the states it is ASTM 6061-T6511 grade aluminum. It was $66. Weighs about the same as the seet 6' mast that came with t; /archives//html/Towertalk/2006-03/msg00315.html (11,295 bytes)
30. Re: [TowerTalk] Aluminum mast (score: 1): Author: "Bruce Ferratt" <uglyatc@msn.com>; Date: Wed, 15 Mar 2006 22:18:20 -0500; Wind load is 40/12 or 3.3 square feet. This was calculated by Jim Lux 'Doc'. Thank you. Bruce K4BOF Check this out: -mast is 1 1/4" OD. It is solid, round. So, you can apply a bit of simple mechanics; /archives//html/Towertalk/2006-03/msg00323.html (15,102 bytes)
31. [TowerTalk] Aluminum mast (score: 1): Author: "Roger Kissel" <kc8hz@hotmail.com>; Date: Wed, 03 Jan 2007 19:14:15 -0500; Hi All I think I recall seeing a comment about mast, tubing and pipe. Back in my early days, we used extruded 6061-T6 in 2 inch diameter with 1/4 inch wall. Many of us sprung for the tubing and put a; /archives//html/Towertalk/2007-01/msg00048.html (8,090 bytes)
32. Re: [TowerTalk] Aluminum mast (score: 1): Author: "D. Scott MacKenzie" <kb0fhp@comcast.net>; Date: Wed, 3 Jan 2007 19:19:50 -0500; I would inspect it - perhaps doing a dye-penetrant examination (look at welding supply stores) - but other than that - it should work well as long as you apply adequate safety factor and do not load; /archives//html/Towertalk/2007-01/msg00050.html (8,760 bytes)
33. Re: [TowerTalk] Aluminum mast (score: 1): Author: "Clint Talmadge" <unclebudd@bellsouth.net>; Date: Wed, 3 Jan 2007 18:20:09 -0600; If it were me, I would stick it up there. But first I would ask Gerald at Texas Towers. That man knows more about aluminum up in the sky than anybody. I know this for a fact since I have seen his EME; /archives//html/Towertalk/2007-01/msg00051.html (8,946 bytes)
34. Re: [TowerTalk] Aluminum mast (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Wed, 3 Jan 2007 21:07:57 -0500; Why would anyone want to use aluminum for a mast? Rust resistance? Lightweight? Flexibility? None of these are necessary characteristics of a mast. The toughest aluminum alloy made doesn't come close; /archives//html/Towertalk/2007-01/msg00053.html (10,488 bytes)
35. Re: [TowerTalk] Aluminum mast (score: 1): Author: Dave NØRQ <n0rq-lists@sbcglobal.net>; Date: Wed, 3 Jan 2007 20:21:00 -0600; Why aluminum? Lighter, yes. No rust, true. But the main reason is that in some applications, such as a modest tribander and a couple of modest VHF/UHF beams, the aluminum is more than strong enough,; /archives//html/Towertalk/2007-01/msg00054.html (12,120 bytes)
36. [TowerTalk] Aluminum mast (score: 1): Author: <john@kk9a.com>; Date: Wed, 3 Jan 2007 21:52:26 -0500; I am a big fan of aluminum masts and I use them on both of my P40A towers shown on http://www.qrz.com/p40a . They are not as strong as steel and they do bend more so you have to make sure that you do; /archives//html/Towertalk/2007-01/msg00058.html (7,588 bytes)
37. Re: [TowerTalk] Aluminum mast (score: 1): Author: Telegrapher9@aol.com; Date: Thu, 4 Jan 2007 03:45:28 EST; Roger, the strength of your aluminum mast can be calculated. Based on the antenna wind load and the maximum wind in your area you will know if it's going to survive or not. The book Physical Design o; /archives//html/Towertalk/2007-01/msg00066.html (7,569 bytes)
38. Re: [TowerTalk] Aluminum mast (score: 1): Author: Telegrapher9@aol.com; Date: Thu, 4 Jan 2007 03:50:39 EST; Dave, rather than plan for graceful mast failure we can design for no failure. Designing these things is not difficult and beats worrying everytime a heavy wind comes up. I had a rather flimsy wooden; /archives//html/Towertalk/2007-01/msg00067.html (7,533 bytes)
39. Re: [TowerTalk] Aluminum mast (score: 1): Author: Dave NØRQ <n0rq-lists@sbcglobal.net>; Date: Thu, 4 Jan 2007 08:50:49 -0600; Hi Dave. Thanks for the note. And I agree completely! When I bought my 12' aluminum mast (from Texas Towers), Gerald ran the numbers for me. No way do I want some mast that is on the verge of failing; /archives//html/Towertalk/2007-01/msg00074.html (8,906 bytes)
40. Re: [TowerTalk] Aluminum mast (score: 1): Author: Telegrapher9@aol.com; Date: Thu, 4 Jan 2007 10:50:00 EST; Roger, here's a link to some good information on tower stresses: http://www.heightstowers.com/tower_specs_and_tutor.htm http://www.google.com/search?q=antenna+element+bending+moment+formula&hl=en&lr; /archives//html/Towertalk/2007-01/msg00083.html (10,068 bytes)

Current List: 21 - 40
Page: [1] [2] [3]