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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Max\s+Unguyed\s+Rohn\s+25\s+height\s+to\s+support\s+dipole\s+end\s*$/: 13 ]

Total 13 documents matching your query.

1. [TowerTalk] Max Unguyed Rohn 25 height to support dipole end (score: 1)
Author: "KDM" <KDM@ctcn.net>
Date: Fri, 10 Nov 2006 19:12:20 -0500
Gents, I have a pile of Rohn 25 that I'd like to use to support the ends of a 160 mtr dipole. No other load other than the tower itself. The center is supported by a TriEx freestanding tower. What's
/archives//html/Towertalk/2006-11/msg00225.html (7,126 bytes)

2. Re: [TowerTalk] Max Unguyed Rohn 25 height to support dipole end (score: 1)
Author: Jim Lux <jimlux@earthlink.net>
Date: Fri, 10 Nov 2006 18:00:28 -0800
Using the handy equations at http://home.earthlink.net/~w6rmk/math/catenary.htm or, more particularly, the 40m example at the bottom of the page and scaling up... assuming you use AWG 12 copper wire,
/archives//html/Towertalk/2006-11/msg00227.html (7,606 bytes)

3. Re: [TowerTalk] Max Unguyed Rohn 25 height to support dipole end (score: 1)
Author: "D. Scott MacKenzie" <kb0fhp@comcast.net>
Date: Sat, 11 Nov 2006 18:59:06 -0500
height is 40 feet - with a 1.5 ft^2 loading - no ice. Scott --Original Message-- From: towertalk-bounces@contesting.com [mailto:towertalk-bounces@contesting.com]On Behalf Of KDM Sent: Friday, Novemb
/archives//html/Towertalk/2006-11/msg00237.html (8,870 bytes)

4. Re: [TowerTalk] Max Unguyed Rohn 25 height to support dipole end (score: 1)
Author: Jim Lux <jimlux@earthlink.net>
Date: Sat, 11 Nov 2006 16:36:55 -0800
1.5 sq ft @ 70 mi/hr is 19 pounds.. If tension is 40 odd pounds (see previous mail with catenary calculation), you're probably a bit overloaded... _______________________________________________ ____
/archives//html/Towertalk/2006-11/msg00239.html (7,849 bytes)

5. Re: [TowerTalk] Max Unguyed Rohn 25 height to support dipole end (score: 1)
Author: "D. Scott MacKenzie" <kb0fhp@comcast.net>
Date: Sat, 11 Nov 2006 20:18:45 -0500
OK - I was assuming that the dipole was going to be at the center and draped inverted V style. I didn't think about using multiple towers - guess that is what happens when I assume. When set up as an
/archives//html/Towertalk/2006-11/msg00242.html (9,789 bytes)

6. [TowerTalk] Max Unguyed Rohn 25 height to support dipole end (score: 1)
Author: <john@kk9a.com>
Date: Sun, 12 Nov 2006 01:38:37 -0000
Is this worth the effort? I think a top loaded vertical or inverted "L" would work much better. John KK9A Gents, I have a pile of Rohn 25 that I'd like to use to support the ends of a 160 mtr dipole.
/archives//html/Towertalk/2006-11/msg00245.html (7,366 bytes)

7. Re: [TowerTalk] Max Unguyed Rohn 25 height to support dipole end (score: 1)
Author: "Michael Tope" <W4EF@dellroy.com>
Date: Sat, 11 Nov 2006 17:40:04 -0800
I suggest that you taper the mast. I would go with ~20 ft of freestanding R25 (2 straight sections and 1 short top section) and then stick a 20'ft piece of 2" schedule 40 aluminum water pipe out the
/archives//html/Towertalk/2006-11/msg00246.html (9,465 bytes)

8. Re: [TowerTalk] Max Unguyed Rohn 25 height to support dipole end (score: 1)
Author: <hdmc38@bellsouth.net>
Date: Sun, 12 Nov 2006 8:28:55 -0500
Hello Ken I think you would over load that 40' when you climb it.20 to 30 feet of 25G is pretty shakey when your on top with no guys.Just my .02 cents. Joe K4XZ JOE PATRICK SENIOR PLUMBING/MECHANICAL
/archives//html/Towertalk/2006-11/msg00252.html (10,377 bytes)

9. Re: [TowerTalk] Max Unguyed Rohn 25 height to support dipole end (score: 1)
Author: "D. Scott MacKenzie" <kb0fhp@comcast.net>
Date: Sun, 12 Nov 2006 11:44:27 -0500
THe Rohn Catalog recommends temporary guys when climbing....but the big question is - how do you guy the top if you can't climb it? Hello Ken I think you would over load that 40' when you climb it.20
/archives//html/Towertalk/2006-11/msg00259.html (11,599 bytes)

10. Re: [TowerTalk] Max Unguyed Rohn 25 height to support dipole end (score: 1)
Author: "Mike Fatchett" <mike@mallardcove.com>
Date: Sun, 12 Nov 2006 09:54:42 -0700
You would place the guys at the 20ft level. THe Rohn Catalog recommends temporary guys when climbing....but the big question is - how do you guy the top if you can't climb it? Hello Ken I think you w
/archives//html/Towertalk/2006-11/msg00261.html (11,763 bytes)

11. Re: [TowerTalk] Max Unguyed Rohn 25 height to support dipole end (score: 1)
Author: "Michael Tope" <W4EF@dellroy.com>
Date: Sun, 12 Nov 2006 09:08:13 -0800
That's why I recommend 20' of unsupported R25 followed by 20' of reinforced aluminum mast. I use a couple of rotator clamp shells on the rotator shelf of the R25 short top section along with an old T
/archives//html/Towertalk/2006-11/msg00263.html (9,794 bytes)

12. Re: [TowerTalk] Max Unguyed Rohn 25 height to support dipole end (score: 1)
Author: <john@kk9a.com>
Date: Sun, 12 Nov 2006 23:22:35 -0000
If you raise the ends to the same height as the center, assuming it's 100' high or so, you will have a bi-directional antenna instead of an omni-directional one. You'll gain about 2dB's broadside and
/archives//html/Towertalk/2006-11/msg00269.html (9,908 bytes)

13. Re: [TowerTalk] Max Unguyed Rohn 25 height to support dipole end (score: 1)
Author: K7LXC@aol.com
Date: Mon, 13 Nov 2006 15:38:52 EST
question is - how do you guy the top if you can't climb it? You don't need temporary guys if the base is in concrete. With Rohn spec'ing guys every 33 feet or so, you're going to have 4 sections or s
/archives//html/Towertalk/2006-11/msg00276.html (8,920 bytes)


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