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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Making\s+an\s+insulated\s+base\s+for\s+80\s+meter\s+vertical\s+from\s+Rohn\s+25\s*$/: 9 ]

Total 9 documents matching your query.

1. Re: [TowerTalk] Making an insulated base for 80 meter vertical from Rohn 25 (score: 1)
Author: brahmangou@aol.com
Date: Wed, 23 Dec 2009 11:29:59 EST
Hi Guys, I got a few emails asking where I got the insulated base. I made it. The insulated legs on the market are pretty expensive, and I didn't like that they are in tension and compression when th
/archives//html/Towertalk/2009-12/msg00246.html (8,286 bytes)

2. Re: [TowerTalk] Making an insulated base for 80 meter vertical from Rohn 25 (score: 1)
Author: n8de@thepoint.net
Date: Wed, 23 Dec 2009 12:15:14 -0500
One comment on Teflon. It is SOFT and will deform rather easily under stress, whether expansion OR compression. Do some testing before you put a lot of force on it. My original idea was to use Teflon
/archives//html/Towertalk/2009-12/msg00247.html (10,063 bytes)

3. Re: [TowerTalk] Making an insulated base for 80 meter vertical from Rohn 25 (score: 1)
Author: "Rex Lint" <rex@lint.mv.com>
Date: Wed, 23 Dec 2009 13:58:22 -0500
Don, The Teflon rod would spread the weight of the tower over 4 square inches or so: marty's would spread it over 40 or so, about a 10 to 1 difference. I'd think deformation of a sheet of Teflon woul
/archives//html/Towertalk/2009-12/msg00248.html (11,776 bytes)

4. Re: [TowerTalk] Making an insulated base for 80 meter vertical from Rohn 25 (score: 1)
Author: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>
Date: Wed, 23 Dec 2009 19:12:26 -0500
I haven't read all of the replies yet, but Teflon is a poor structural material. If under compression or expansion it will move. It "cold flows" substantially, like an extremely thick taffy. I used i
/archives//html/Towertalk/2009-12/msg00252.html (11,119 bytes)

5. Re: [TowerTalk] Making an insulated base for 80 meter vertical from Rohn 25 (score: 1)
Author: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>
Date: Wed, 23 Dec 2009 19:16:23 -0500
And that Teflon will still "cold flow" leading to a slow change in capacitance. But didn't he say it was a "cutting board" 1" thick. I seriously doubt it is Teflon, but rather like all cutting boards
/archives//html/Towertalk/2009-12/msg00253.html (14,102 bytes)

6. Re: [TowerTalk] Making an insulated base for 80 meter vertical from Rohn 25 (score: 1)
Author: EZ Rhino <EZRhino@fastmovers.biz>
Date: Wed, 23 Dec 2009 17:44:06 -0700
I thought Marty stated he's using HDPE, that's hi density poly ethylene (not teflon) for the main insulator, and uses teflon (PTFE) for the bolt sleeves and washers. Looks to me that the main compres
/archives//html/Towertalk/2009-12/msg00256.html (11,557 bytes)

7. Re: [TowerTalk] Making an insulated base for 80 meter vertical from Rohn 25 (score: 1)
Author: n8de@thepoint.net
Date: Thu, 24 Dec 2009 01:13:12 -0500
I agree with your analysis. Don N8DE _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.conte
/archives//html/Towertalk/2009-12/msg00260.html (13,562 bytes)

8. [TowerTalk] Making an insulated base for 80 meter vertical from Rohn 25 (score: 1)
Author: brahmangou@aol.com
Date: Thu, 24 Dec 2009 01:38:36 EST
Hello All, Thank you for all of your questions and suggestions. The fluid characteristics of plastics was what scared me about the commercially available tower leg insulators. Like the fellow's mobil
/archives//html/Towertalk/2009-12/msg00261.html (8,250 bytes)

9. Re: [TowerTalk] Making an insulated base for 80 meter vertical from Rohn 25 (score: 1)
Author: "K1TTT" <K1TTT@ARRL.NET>
Date: Thu, 24 Dec 2009 11:59:14 +0000
Just remember though, the force on the bottom of a tower is not just the weight of the tower. Assuming 3 directions and 2 levels of hand tightened guys at about 100# tension leaving the tower at a 45
/archives//html/Towertalk/2009-12/msg00263.html (10,624 bytes)


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