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Total 374 documents matching your query.

1. [TowerTalk] Short Beverages & Snakes (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Wed Jul 16 07:53:02 2003
It's summertime, and I'm thinking of improvements to my antennas. In particular, I'd like to have a low-noise receiving antenna for 40, 80 and maybe 160m. This would likely be used for domestic stati
/archives//html/Towertalk/2003-07/msg00243.html (7,851 bytes)

2. [TowerTalk] Rohn BX - What type of Gin Pole? (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Sat Jul 26 00:34:11 2003
Friend of mine is building a new house, and he doesn't want to pay his Satellite TV service $6 a month for local channels. So, he's going to put up a ~50 foot tower with a TV antenna, and he came and
/archives//html/Towertalk/2003-07/msg00412.html (7,468 bytes)

3. [TowerTalk] House Bracketing Rohn 25 or 45 (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Sun May 11 00:03:20 2003
For a bracketed installation, you may have to seriously limit the amount of antenna you can place at the top. Depends. 1) What is the maximum wind velocity for your county? 2) How much antenna area d
/archives//html/Towertalk/2003-05/msg00107.html (8,113 bytes)

4. [TowerTalk] Old World Thinking-guying self supporting towers (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Sun May 11 00:21:38 2003
For someone who claims to have a mechanical engineering degree, this is completely absurd! Consider -- the wind pressure varies with the SQUARE of the wind velocity. Antenna support structures design
/archives//html/Towertalk/2003-05/msg00108.html (7,723 bytes)

5. [TowerTalk] Inverted L, Sloper or Shunt Feed? (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Sun May 11 00:46:38 2003
Now that it is summer, I need to make some improvements to my station on the low bands - particularly 160m and 80m. Right now, I've got a 15m tower with an A3S on top. I have a shunt feed made of two
/archives//html/Towertalk/2003-05/msg00109.html (8,548 bytes)

6. [TowerTalk] Inverted L, Sloper or Shunt Feed? (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Mon May 12 07:59:39 2003
I plan to add 12 more this summer. I went from 4 to 13 last year. Didn't make a big difference on 80m, but it sure perked up the 40m 1/4 wave sloper. Retuning isn't a problem. The real question is, w
/archives//html/Towertalk/2003-05/msg00127.html (10,710 bytes)

7. [TowerTalk] Tower Attachment (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Wed Apr 16 23:17:47 2003
Important questions. What height will the brackets be? If you study the Rohn catalog, they pretty much recommend using more than one bracket, although if the top bracket is below 15 feet and the towe
/archives//html/Towertalk/2003-04/msg00286.html (9,099 bytes)

8. [TowerTalk] Tower jack (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Wed Apr 16 23:21:55 2003
While this is interesting -- why both to get something special for this? Any tower-owning ham ought to have a bottle of No-Al-Ox or Penetrox anyway, right. The particles in the anti-oxidant are zinc,
/archives//html/Towertalk/2003-04/msg00287.html (7,111 bytes)

9. [TowerTalk] Guyed self-supporters (was "Concrete suggestions") (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Thu Apr 17 08:04:06 2003
I don't think this is generally true. It all depends on what the limiting structural element of the tower is. Only the Engineer knows that for sure. And those "slack" guys aren't just infintesimally
/archives//html/Towertalk/2003-04/msg00298.html (9,278 bytes)

10. [TowerTalk] compass question (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Sat Mar 8 10:57:46 2003
Also keep in mind that the Earth's magnetic field is affected by the surface composition. On my Atlanta area Terminal Charts, there's a note around Stone Mountain which indicates that compass deviati
/archives//html/Towertalk/2003-03/msg00120.html (10,774 bytes)

11. [TowerTalk] 3 Ele 40 of Choice? (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Fri Mar 14 08:03:58 2003
The models show better F/B than a 2 element yagi, but similar gain. Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr@arrl.net Quote: "Not within a thousand years will man ever fly!" -- Wilbur Wright, 1901
/archives//html/Towertalk/2003-03/msg00171.html (7,621 bytes)

12. [TowerTalk] Digging the hole...after the "dig" (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Sat Feb 22 17:05:15 2003
Instead, I suggest he rent a small mixer from your local home improvement store. Mine cost $40/day, and I mixed 28 bags of sacrete in a little over 2 hours. (two 60 lb bags at a time). I can't imagin
/archives//html/Towertalk/2003-02/msg00428.html (8,506 bytes)

13. [Towertalk] 8 pole water tight plu for rotor cable. (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Thu, 3 Oct 2002 22:53:35 -0400
Buy two sets of 4-wire trailer hitch connectors. Reverse one of the sets so you don't get the two sets confused. There, for < $20, you have an 8-ple water resistant connector set for your rotator....
/archives//html/Towertalk/2002-10/msg00122.html (7,067 bytes)

14. [Towertalk] 8 pole water tight plu for rotor cable. (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Thu, 3 Oct 2002 22:54:49 -0400
I did the same thing -- but I used two four-pin sets and just reversed one of the sets. That way, you can't plug it in backwards. Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr@arrl.net Quote: "Not within
/archives//html/Towertalk/2002-10/msg00123.html (7,165 bytes)

15. [Towertalk] Aircraft Cable (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Thu, 3 Oct 2002 22:58:32 -0400
Why bother with Nicopress sleeves when you can use pre-formed guy grips? (Unless you're building an airplane, of course, then Nicopress are the only acceptable alternative) Bill Coleman, AA4LR, PP-AS
/archives//html/Towertalk/2002-10/msg00124.html (8,525 bytes)

16. [Towertalk] Antenna Hoist Rope? (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Fri, 4 Oct 2002 23:37:09 -0400
Paul, I hate to disagree, but chemistry says just the opposite. Polyproplene rope degrades quite quickly in the sun. Within a year, it will be so brittle and will shed fibers everywhere. It is used i
/archives//html/Towertalk/2002-10/msg00161.html (7,513 bytes)

17. [Towertalk] Cracked Leg on Rohn 45G (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Sun, 6 Oct 2002 18:05:17 -0400
So, uh, who would climb such a tower to install the tribanders? Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr@arrl.net Quote: "Not within a thousand years will man ever fly!" -- Wilbur Wright, 1901
/archives//html/Towertalk/2002-10/msg00194.html (9,346 bytes)

18. [Towertalk] Cracked Leg on Rohn 45G (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Mon, 7 Oct 2002 21:34:13 -0400
Since I sent this to you personally Tom, and you have answered on the list, I'll answer on the list. The rusting ground level is of grave concern. Are they? It is hard to tell from the description. W
/archives//html/Towertalk/2002-10/msg00251.html (12,249 bytes)

19. [Towertalk] Rohn 25G Bracketing (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Mon, 7 Oct 2002 23:55:48 -0400
As a practical matter, if the top bracket is 15 feet or less above the ground, it is probably not necessary to have a second bracket, so long as the tower is part of the concrete pour. Given the stif
/archives//html/Towertalk/2002-10/msg00254.html (11,455 bytes)

20. [Towertalk] Rohn 25G Bracketing (score: 1)
Author: aa4lr@arrl.net (Bill Coleman)
Date: Tue, 8 Oct 2002 00:01:39 -0400
Lag bolts into brick are not going to be sufficiently strong to hold a bracket. I estimated lateral forces in excess of 700 lbs in my bracketed installations. Carriage bolts are a must, and they must
/archives//html/Towertalk/2002-10/msg00255.html (8,367 bytes)


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