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Total 896 documents matching your query.

321. Re: [TowerTalk] torque tightening querry (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Fri, 26 May 2006 12:56:04 -0000
If you have that much specific data, what does the manufacturer or engineer that designed it say?? David Robbins K1TTT e-mail: mailto:k1ttt@arrl.net web: http://www.k1ttt.net AR-Cluster node: 145.69M
/archives//html/Towertalk/2006-05/msg00454.html (8,391 bytes)

322. Re: [TowerTalk] Is this suitable for 150' rotator control? (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Sun, 28 May 2006 23:28:44 -0000
Try looking for the wire they use for low voltage outdoor lights. The type you put on decks and along walks. Its cheap and rugged. I have also used 10-3w/g for a LONG rotor run for high current prop
/archives//html/Towertalk/2006-05/msg00469.html (9,150 bytes)

323. Re: [TowerTalk] Bentonite ? (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Thu, 8 Jun 2006 22:58:49 -0000
Bentonite is used to improve ground systems. Utilities have used it for years in areas where its hard to get good grounds. http://www.google.com/search?hl=en&q=bentonite+ground+system+improvement Dav
/archives//html/Towertalk/2006-06/msg00142.html (8,884 bytes)

324. Re: [TowerTalk] How to ground a tower system? (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Fri, 9 Jun 2006 23:56:35 -0000
Lightning doesn't necessarily travel the straight path... it takes whatever path happens to be handy... or it makes its own if nothing else is available. Run the shortest fattest wires you can and be
/archives//html/Towertalk/2006-06/msg00170.html (9,193 bytes)

325. [TowerTalk] big antennas! (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Wed, 14 Jun 2006 20:54:06 -0000
Ever wonder how a 48' boom 150# antenna gets from ground level to 180'? This weekend you may get a chance to get some practical experience in how its done. I am almost ready to lift the new 4 element
/archives//html/Towertalk/2006-06/msg00285.html (7,726 bytes)

326. Re: [TowerTalk] coax stubs (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Wed, 14 Jun 2006 21:06:56 -0000
See the basic K2TR designs at: http://www.k1ttt.net/technote/techref.html#filters And lots of other info on the other links. David Robbins K1TTT e-mail: mailto:k1ttt@arrl.net web: http://www.k1ttt.ne
/archives//html/Towertalk/2006-06/msg00286.html (8,585 bytes)

327. Re: [TowerTalk] coax stubs (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Thu, 15 Jun 2006 19:41:33 -0000
Stubs are fairly wide band pass and reject filters. Much more than a ham band wide. You have to go to multi-pole lumped filters or crystal filters to get in band rejection. The 'Single Coax Stub Anal
/archives//html/Towertalk/2006-06/msg00331.html (9,441 bytes)

328. Re: [TowerTalk] Arc During Lightning Storm (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Fri, 23 Jun 2006 23:33:08 -0000
You are hearing the original lightning protector... the gap between wires in typical electrical outlets, lamp sockets, switches, etc is so small that they will arc over at just a couple thousand volt
/archives//html/Towertalk/2006-06/msg00549.html (9,259 bytes)

329. Re: [TowerTalk] Wenches (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Fri, 30 Jun 2006 19:31:55 -0000
Would a wench be useful in taunting guide wires? Or is this all just getting silly? Maybe its time for another owl pointing true north discussion? David Robbins K1TTT e-mail: mailto:k1ttt@arrl.net we
/archives//html/Towertalk/2006-06/msg00737.html (8,247 bytes)

330. Re: [TowerTalk] Ends of Dipoles - Mythbusting (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Sat, 1 Jul 2006 23:11:08 -0000
Lets apply what is in your signature... some common sense. Compare the size of a 1/2 wave dipole, say even on 10m with the size of the loop and a few turns of wire. Such a small loop may add a very t
/archives//html/Towertalk/2006-07/msg00017.html (10,098 bytes)

331. Re: [TowerTalk] Grounding base slab and pier tower bases (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Tue, 4 Jul 2006 14:34:34 -0000
Experience may trump theory, but scientific experiment trumps experience EVERY time! porcupines on towers have been shown to not stop strikes. Not any more than an owl stops birds. David Robbins K1TT
/archives//html/Towertalk/2006-07/msg00080.html (11,238 bytes)

332. Re: [TowerTalk] Grounding base slab and pier tower bases (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Tue, 4 Jul 2006 15:55:38 -0000
http://lists.contesting.com/_towertalk/2004-03/msg00380.html David Robbins K1TTT e-mail: mailto:k1ttt@arrl.net web: http://www.k1ttt.net AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net _________
/archives//html/Towertalk/2006-07/msg00086.html (10,619 bytes)

333. Re: [TowerTalk] Water tower omni (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Tue, 4 Jul 2006 16:01:09 -0000
The 'rolling ball' theory of lightning protection is an ancient method that said basically that you take a ball (in your mind of course) as tall as a vertical object and roll it around the object and
/archives//html/Towertalk/2006-07/msg00087.html (10,292 bytes)

334. Re: [TowerTalk] Grounding base slab and pier tower bases (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Tue, 4 Jul 2006 18:03:34 -0000
20' isn't all that much rebar. There's probably that much in a 3'x3'x4' block for rohn 25/45 type base when its done right. And I would be surprised if anyone could put such a limit on 'absorption' b
/archives//html/Towertalk/2006-07/msg00095.html (14,308 bytes)

335. Re: [TowerTalk] Porcupines (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Tue, 4 Jul 2006 18:13:33 -0000
Sounds like a mega stroke got you. Likely one of those 150-200ka positive strokes. There are services out there that do 'forensic weather' analysis and can look up individual or whole storm's worth o
/archives//html/Towertalk/2006-07/msg00096.html (19,715 bytes)

336. Re: [TowerTalk] Porcupines and other wives tales (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Tue, 4 Jul 2006 21:45:12 -0000
Cosmic rays super charge the cloud?!?! Now that's a new one. the last time I read a journal article about cosmic rays they were cited as a possible cause of the initial breakdown because they left a
/archives//html/Towertalk/2006-07/msg00107.html (13,004 bytes)

337. Re: [TowerTalk] Porcupines and other wives tales (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Thu, 6 Jul 2006 22:40:37 -0000
Actually if you read some of the old literature about radioactive tips, and some other fancy schemes to make franklin type rods work better the idea was to help formation of the upward streamer from
/archives//html/Towertalk/2006-07/msg00182.html (14,836 bytes)

338. Re: [TowerTalk] Porcupines and other wives tales (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Fri, 7 Jul 2006 17:55:09 -0000
An 'essay' on a web site is hardly a peer reviewed journal article in a publication specializing in lightning. I'll stick with the explanations out of those publications for now, thank you. David Rob
/archives//html/Towertalk/2006-07/msg00205.html (17,412 bytes)

339. Re: [TowerTalk] Mast and Thrust Bearing questions (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Sat, 8 Jul 2006 10:31:39 -0000
I have had 2 tb-3's at 150' above peru mass for 22 years without touching them. At least 4 others also up for periods from 20 to 7 years, never a failure here. Never a drop of lube. David Robbins K1T
/archives//html/Towertalk/2006-07/msg00228.html (12,046 bytes)

340. Re: [TowerTalk] Ground to ground lightning? I doubt it. (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Tue, 11 Jul 2006 20:04:27 -0000
Likely just a forked stroke coming down hitting 2 spots almost at the same time. multiple strokes in the same flash can often hit thousands of feet apart, the national lightning detection network has
/archives//html/Towertalk/2006-07/msg00350.html (11,645 bytes)


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