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Total 90 documents matching your query.

1. [TowerTalk] guyed tower reference/failures (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Mon, 06 Aug 2001 17:19:35 +0100
birdbath supports, holding up clotheslines, supports for above ground feed lines, fence posts, temporary supports(horizontal) for building antennas, paint stands, pipe racks (great for organizing sma
/archives//html/Towertalk/2001-08/msg00109.html (10,940 bytes)

2. [TowerTalk] Removing rivets? (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Sat, 07 Jul 2001 16:55:41 +0100
if the rivets are tight you can use a drill bit just a bit larger than the hole in the rivet. most pop rivets take about a 1/8" hole, i use a 3/16" or so bit and drill just until the head comes off,
/archives//html/Towertalk/2001-07/msg00105.html (8,308 bytes)

3. [TowerTalk] Take down Rohn 25G tower with crane? (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Mon, 09 Jul 2001 18:56:15 +0100
before you go to all that trouble just take a couple decent size wrenches. if the bolts don't loosen easily just twist the heads off and forget them. much faster and less effort than trying to save t
/archives//html/Towertalk/2001-07/msg00158.html (9,632 bytes)

4. [TowerTalk] Hawks (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Sun, 29 Jul 2001 11:12:00 +0100
got lots of them around here, they often nest in trees at the edge of the field the towers are in, about 100' away. they make a racket but leave me alone. now the circling vultures are another story.
/archives//html/Towertalk/2001-07/msg00631.html (9,348 bytes)

5. [TowerTalk] V_I_R_U_S A_L_E_R_T (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Mon, 30 Jul 2001 19:07:06 +0100
I hate to blast this out to these lists, but today i have received several copies of the w32.sircam.worm from addresses i recognize from various ham mail lists. this one spreads very quickly. you can
/archives//html/Towertalk/2001-07/msg00663.html (8,213 bytes)

6. [TowerTalk] Ginpole for 20 foot sections (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Wed, 13 Jun 2001 14:21:59 +0100
of course the lifting rope load remains the same, but the force required on the pulling end decreases so the total load on the gin pole does get reduced. for example, with a standard gin pole lifting
/archives//html/Towertalk/2001-06/msg00279.html (11,986 bytes)

7. [TowerTalk] Ginpole for 20 foot sections (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Wed, 13 Jun 2001 16:27:41 +0100
start with this, a single pulley at B with a 300lb load at C and a 300lb person at A holding it off the ground. there is 300lb of tension in the rope to hold the load up, so at B there is 300lb pulli
/archives//html/Towertalk/2001-06/msg00290.html (14,293 bytes)

8. [TowerTalk] Ginpole for 20 foot sections (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Wed, 13 Jun 2001 17:37:39 +0100
i have not had a need to do it, but a 2:1 arrangement would also be easy to do. all you need to do is tie one end of the rope to the top of the pole, run through a single moving pulley where you atta
/archives//html/Towertalk/2001-06/msg00295.html (11,603 bytes)

9. [TowerTalk] Ginpole for 20 foot sections (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Wed, 13 Jun 2001 18:27:30 +0100
wrong... as i pointed out it is possible to get an advantage for both the puller and the pole by the use of a single top pulley and a single travelling pulley. that is the basic 2:1 system where you
/archives//html/Towertalk/2001-06/msg00305.html (10,618 bytes)

10. [TowerTalk] Ginpole for 20 foot sections (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Wed, 13 Jun 2001 19:20:03 +0100
its the same as if someone was holding it, you still have that downward force exerted to keep the load where it was. one basic misconception is that a force being applied doesn't mean that anything i
/archives//html/Towertalk/2001-06/msg00317.html (12,904 bytes)

11. [TowerTalk] Ginpole for 20 foot sections (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Wed, 13 Jun 2001 20:19:03 +0100
WRONG! the higher the mechanical advantage of the block and tackle the lower the load on what is holding it up(diregarding the weight of the tackle itself). i'm sorry if you just don't get it, i've e
/archives//html/Towertalk/2001-06/msg00322.html (11,081 bytes)

12. [TowerTalk] 7075-T6 Aluminum (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Thu, 21 Jun 2001 11:19:03 +0100
in aluminum alloy designations the first number is the alloy composition number which can be looked up in a table to get the various percentages of elements in the alloy. the 'T' number is the heat t
/archives//html/Towertalk/2001-06/msg00499.html (9,031 bytes)

13. [TowerTalk] fall arresting equipment for roofs (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Fri, 04 May 2001 15:35:19 +0100
has this changed recently or are there separate requirements based on the type of tower? training i had a year or so ago on osha requirements for work on power line towers still allowed for the belt
/archives//html/Towertalk/2001-05/msg00128.html (8,292 bytes)

14. [TowerTalk] Using extra anchors (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Sat, 05 May 2001 18:47:27 +0100
i would not pull up more than about 60' of rohn 25 no matter how many people you have. i would expect that at 90' with lights and wires you would fold over the legs of the bottom section or fold the
/archives//html/Towertalk/2001-05/msg00156.html (10,539 bytes)

15. [TowerTalk] aluminum towers (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Wed, 23 May 2001 17:23:16 +0100
they are, but not always the same body of water on each side. look at barrier islands along the coast, or islands at the end of a river delta. long island ny is a good example, one side on the ocean
/archives//html/Towertalk/2001-05/msg00478.html (8,378 bytes)

16. [TowerTalk] thoughts about property layout (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Sat, 26 May 2001 12:26:07 +0100
bury the wire not a good idea. maybe attach a tower to the house no, read the latest arrl letter about a ham being killed when the 2m ant they were putting up came in contact with the house wires. wi
/archives//html/Towertalk/2001-05/msg00542.html (9,504 bytes)

17. [TowerTalk] lightning season info (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Wed, 18 Apr 2001 15:16:02 +0100
with lightning season here and spring/summer (though i still have 1-2' of snow on the ground here!) contests getting under way here are a few links that may prove useful. please feel free to pass the
/archives//html/Towertalk/2001-04/msg00398.html (9,591 bytes)

18. [TowerTalk] Tower Installation Question??? (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Mon, 05 Mar 2001 17:28:43 +0000
also, don't connect with screws. the best way is to drill through and use either bolts with large washers if you have good size structural members in the right spot(only works if you are very lucky)
/archives//html/Towertalk/2001-03/msg00106.html (10,319 bytes)

19. [TowerTalk] mast intrusion into tower (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Sat, 13 Jan 2001 13:00:23 +0000
several reasons: 1. jacking the antenna further up the mast than you can work standing on top of the tower is a real pain. 2. lowering an antenna jacked up on the mast to work on it and then putting
/archives//html/Towertalk/2001-01/msg00322.html (9,851 bytes)

20. [TowerTalk] Lifting Rope Summary (score: 1)
Author: k1ttt@berkshire.net (David Robbins)
Date: Sun, 01 Aug 1999 14:52:20 +0000
Several of you asked for a summary of what I got about heavy lifting rope. This started because I need a new rope for lifting stuff up my new 180' tower. I used to use a fine thread polypropylene twi
/archives//html/Towertalk/1999-08/msg00002.html (11,913 bytes)


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