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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Vertical\s+Antenna\s+Tubing\s+Strength\s+\(was\:Increasingeffective\s+4SQR\s+array\s+bandwidth\?\?\?\s*$/: 3 ]

Total 3 documents matching your query.

1. [TowerTalk] Vertical Antenna Tubing Strength (was:Increasingeffective 4SQR array bandwidth??? (score: 1): Author: w5kp@swbell.net (J. Kincade); Date: Thu, 30 Aug 2001 04:52:58 -0500; Tom, wouldn't that make 20' sections of 4" irrigation pipe the material of choice for large (over 40') verticals? Only problem is, I have no idea what grade of aluminum they are made of. 73, Jerry ht; /archives//html/Towertalk/2001-08/msg00677.html (11,991 bytes)
2. [TowerTalk] Vertical Antenna Tubing Strength (was:Increasingeffective 4SQR array bandwidth??? (score: 1): Author: dcoolica@planet.eon.net (Denis Coolican); Date: Thu, 30 Aug 2001 09:45:24 -0500; Tom, I am presently building a 4 in line vertical array for 80 meteres and can offer the following: Structural program for calculating stresses is in Ham Radio Dec 98 by K5IU I use his spreadsheet wi; /archives//html/Towertalk/2001-08/msg00692.html (10,787 bytes)
3. [TowerTalk] Vertical Antenna Tubing Strength (was:Increasingeffective 4SQR array bandwidth??? (score: 1): Author: w7why@harborside.com (Tom Osborne); Date: Sun, 26 Aug 2001 21:04:37 -0700; HI Rick et al. I raised a 50' piece of KLM boom I spliced together that i used for a vertical by inserting a couple of 15 foot 4x4's in the ground. Drilled a hole at about the 12 foot level of the tu; /archives//html/Towertalk/2001-08/msg00710.html (9,865 bytes)

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