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Total 1148 documents matching your query.

1. [TowerTalk] Crank up tower with a stack? (score: 1)
Author: Grant Saviers <>
Date: Mon, 29 Mar 2010 21:14:16 -0700
As a feasibility check, here is a potential design: I'd like at least a 2 x tribander stack (10 sq ft ea, e.g. TH7DX or SteppIR DB-18) and a 2 el 40m beam (various) on a crank up/tilt over tower, hei
/archives//html/Towertalk/2010-03/msg00606.html (8,350 bytes)

2. Re: [TowerTalk] Ground rods with jack hammer drill (score: 1)
Author: Grant Saviers <>
Date: Tue, 30 Mar 2010 15:45:17 -0700
Bosch and DeWalt make a driver bit specifically for ground rods, check with a contractor or electrical supply dealer. I bought one from ToolUp in Santa Clara, CA. Online at
/archives//html/Towertalk/2010-03/msg00653.html (8,653 bytes)

3. Re: [TowerTalk] Moving big rocks (score: 1)
Author: Grant Saviers <>
Date: Thu, 01 Apr 2010 09:42:07 -0700
Steve, Several alternatives as these are about 1+ tons. For smooth boulders the following have worked for me; If you can get a tractor/dozer nearby with a winch it is easiest to skid them along with
/archives//html/Towertalk/2010-04/msg00013.html (9,763 bytes)

4. Re: [TowerTalk] Tailtwister Rotor Rehab Question (score: 1)
Author: Grant Saviers <>
Date: Sun, 11 Apr 2010 19:57:50 -0700
A full synthetic grease, particularly loaded with Teflon should work well, at least for my rebuilds I'm happy. My favorite is Super-Lube from Synco Chemical, available many places including MSC, McMa
/archives//html/Towertalk/2010-04/msg00309.html (9,003 bytes)

5. Re: [TowerTalk] Gin Pole Rope (score: 1)
Author: Grant Saviers <>
Date: Wed, 14 Apr 2010 21:18:58 -0700
I use a low stretch braided dacron that is made by New England ropes in a 7/16" size, which I find is the smallest line that has good hand, can be tied easily, and fits the rohn gin pole fittings. We
/archives//html/Towertalk/2010-04/msg00471.html (10,827 bytes)

6. Re: [TowerTalk] Tilt Up Tower (score: 1)
Author: Grant Saviers <>
Date: Sun, 18 Apr 2010 10:08:21 -0700
"near the house" How near? I reinforced the gable studs on one house to be strong enough for a block and tackle. It lifted 30' of Rohn 25 plus 15' of mast extension with a TH7DX to a house bracket mo
/archives//html/Towertalk/2010-04/msg00506.html (9,124 bytes)

7. [TowerTalk] Measuring a 70cm MOXON turnstile antenna (score: 1)
Author: Grant Saviers <>
Date: Wed, 21 Apr 2010 17:03:06 -0700
For some 425 Mhz high power amateur rocket telemetry (APRS packets) I've built a MOXON turnstile (Cebik, QST August 2001) from brass brazing rod 0.093" dia. Now the challenge is to try and measure wh
/archives//html/Towertalk/2010-04/msg00638.html (9,472 bytes)

8. Re: [TowerTalk] Tilt Up Tower (score: 1)
Author: Grant Saviers <>
Date: Fri, 23 Apr 2010 14:56:50 -0700
My suggestion was the rope over the roof as a sky hook, for a block and tackle rig that did the lifting. Otherwise, there will be damage to the rope, the roof, and a bad situation with a lifting crew
/archives//html/Towertalk/2010-04/msg00731.html (8,350 bytes)

9. Re: [TowerTalk] what not to do in your tower (score: 1)
Author: Grant Saviers <>
Date: Fri, 23 Apr 2010 15:29:37 -0700
Agreed that constructive help is best. Here is a quick sanity check on the danger actually involved with the rigging as photographed. I've taken down worse (after some temporary guying). EHS and Phil
/archives//html/Towertalk/2010-04/msg00733.html (11,499 bytes)

10. Re: [TowerTalk] US Tower damaged by lightning (score: 1)
Author: Grant Saviers <>
Date: Wed, 28 Apr 2010 17:32:53 -0700
Jim, Quite a horror story. It seems you did a lot of smart things with the installation, but they weren't enough. I'm no lightning expert but here are some thoughts: An earlier post (which I can't fi
/archives//html/Towertalk/2010-04/msg00952.html (10,913 bytes)

11. Re: [TowerTalk] Adivce Using Irrigation Pipe (score: 1)
Author: Grant Saviers <>
Date: Fri, 30 Apr 2010 16:39:43 -0700
My top loaded 80m vertical on my galvanized barn roof is made from 2 x 20' 3" irrigation pipe with a 12' diameter capacity hat. Here are some suggestions: You need the side guys at all times when you
/archives//html/Towertalk/2010-04/msg00997.html (13,074 bytes)

12. Re: [TowerTalk] Cage Dipole Project Question (score: 1)
Author: Grant Saviers <>
Date: Tue, 04 May 2010 16:52:17 -0700
I had an 80m dipole that used 7/8" od bare aluminum CATV hardline. It had a real nice bandwidth (at least 2x 14 ga wire) and the copperweld center conductor is strong. To connect to the shield at the
/archives//html/Towertalk/2010-05/msg00104.html (9,722 bytes)

13. Re: [TowerTalk] Rope Guy Adjusters? (score: 1)
Author: Grant Saviers <>
Date: Tue, 04 May 2010 17:45:57 -0700
A "trucker's hitch" is a lot cheaper, probably more secure, and likely stronger as the rope isn't point compressed. There are lots of versions to choose from, here are two I like Not a "real" trucker
/archives//html/Towertalk/2010-05/msg00106.html (10,644 bytes)

14. Re: [TowerTalk] Aluminum Tower Mast (score: 1)
Author: Grant Saviers <>
Date: Wed, 05 May 2010 16:47:39 -0700
6063 is cheaper than 6061 so is the alloy of choice for electrical conduit (sch 40) & irrigation pipe (sch 10 if it has gasketed couplers). Gas/water pipe uses NPT (national pipe thread) tapered thre
/archives//html/Towertalk/2010-05/msg00139.html (9,500 bytes)

15. Re: [TowerTalk] Broken masts (score: 1)
Author: Grant Saviers <>
Date: Thu, 06 May 2010 21:45:10 -0700
I'm a little confused by all the stress numbers being quoted. I think the number that matters is yield strength so the mast doesn't permanently bend. Tensile or ultimate has value only to insure it w
/archives//html/Towertalk/2010-05/msg00172.html (9,427 bytes)

16. Re: [TowerTalk] My 48' Delhi Self Supporter folded over (score: 1)
Author: Grant Saviers <>
Date: Fri, 07 May 2010 18:35:36 -0700
The torque tightening values for A325 or grade 5 galvanized bolts are sobering see (note the cautions) some values that might b
/archives//html/Towertalk/2010-05/msg00188.html (12,435 bytes)

17. Re: [TowerTalk] Installing a XM240 on a Tic Ring (score: 1)
Author: Grant Saviers <>
Date: Fri, 14 May 2010 10:18:30 -0700
You might consider Holobar thick wall aluminum tube, available from several sources on the web I usually find scrap ends at my local SIMS metal recycle yard or local Al remnant dealer. see http://met
/archives//html/Towertalk/2010-05/msg00282.html (7,605 bytes)

18. Re: [TowerTalk] Best mast location? (score: 1)
Author: Grant Saviers <>
Date: Fri, 14 May 2010 12:52:16 -0700
For various reasons (some inherent in bearing manufacturing tolerances) three spaced bearings are almost never done in machinery - it's just too hard to get them/keep them aligned. Two bearings can h
/archives//html/Towertalk/2010-05/msg00285.html (10,888 bytes)

19. Re: [TowerTalk] thrust bearing lubrication (score: 1)
Author: Grant Saviers <>
Date: Tue, 18 May 2010 12:15:57 -0700
Having the rotator take all the thrust load doesn't thrill me, but replacing a thrust bearing is a real pain. I guess I'm a convert to "no stock thrust bearings". However, my own design.... I just re
/archives//html/Towertalk/2010-05/msg00352.html (11,030 bytes)

20. Re: [TowerTalk] Rotor Removal (score: 1)
Author: Grant Saviers <>
Date: Tue, 25 May 2010 10:27:18 -0700
You are on the right track. The second rotator plate should have a plate with a hole just oversize for the mast. Then as the crane lowers the mast into the tower it will keep the mast near vertical.
/archives//html/Towertalk/2010-05/msg00606.html (10,545 bytes)

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