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Total 1919 documents matching your query.

201. Re: [TowerTalk] Protecting Buried Guy Anchors and Tower Sections (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Thu, 14 Oct 2010 23:12:32 +0100
Waxoyl would work (if available in the USA) because it is specifically formulated to prevent corrosion in wet environments. My old moonbounce system had a rotating steel mast in a ground socket fille
/archives//html/Towertalk/2010-10/msg00179.html (9,426 bytes)

202. Re: [TowerTalk] Lightning Protection Question (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Mon, 13 Sep 2010 17:20:26 +0100
The word "theory" has two different definitions that are almost completely opposite to each other. The only flaw is if you use the wrong one. The US National Academy of Sciences sums it up very neatl
/archives//html/Towertalk/2010-09/msg00289.html (10,170 bytes)

203. Re: [TowerTalk] Type 31 baluns (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 2 Jun 2010 08:34:04 +0100
That would be me... The technical background is the same all over the world, but the cost of "named ferrite" [1] is much higher outside of the USA so cost-effectiveness is a much bigger part of the d
/archives//html/Towertalk/2010-06/msg00019.html (11,564 bytes)

204. Re: [TowerTalk] Baluns/tutorial/notes. (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Mon, 24 May 2010 09:20:23 +0100
For impedance measurements on chokes, I use the same physical layout that Rick describes above. The only differences are in the calibration procedure and the mathematical processing of the raw data.
/archives//html/Towertalk/2010-05/msg00566.html (12,632 bytes)

205. Re: [TowerTalk] Baluns/tutorial/notes applied to the AV640 (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Sun, 23 May 2010 08:36:12 +0100
The devices that we are (mostly?) discussing here date back to 1949: High-Frequency Matching Transformer, US Patent 2,470,307, 17 May 1949 Unfortunately Guanella muddied the waters by publishing anot
/archives//html/Towertalk/2010-05/msg00545.html (11,277 bytes)

206. Re: [TowerTalk] Baluns/tutorial/notes. (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Sat, 22 May 2010 09:10:40 +0100
I agree with Steve; you *can* take a couple of clip leads... but then you have to pre-calibrate the whole setup quite carefully against three impedance standards. Analyzers that have no facilities to
/archives//html/Towertalk/2010-05/msg00492.html (13,422 bytes)

207. Re: [TowerTalk] My 48' Delhi Self Supporter folded over (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Fri, 7 May 2010 07:51:24 +0100
Can you be more specific? There are many different kinds of Loctite [1], many different kinds of galvanized hardware... and many, many different kinds of screw-up :-) [1] Loctite Selection Guide: <ht
/archives//html/Towertalk/2010-05/msg00176.html (7,543 bytes)

208. Re: [TowerTalk] Rope Guy Adjusters? (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 5 May 2010 07:30:59 +0100
I've had very good experience with larger rope grips using the same 3-ball system, which gives a very firm hold on a 3-twist rope. They really are superb... but they are also 50% bigger than the ones
/archives//html/Towertalk/2010-05/msg00117.html (9,057 bytes)

209. Re: [TowerTalk] AV-640 (was GapChallenger ComparisonTesting Studies) (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Mon, 26 Apr 2010 23:20:34 +0100
What language is that? It ain't American, fer sure... -- 73 from Ian GM3SEK _______________________________________________ _______________________________________________ TowerTalk mailing list Towe
/archives//html/Towertalk/2010-04/msg00858.html (8,061 bytes)

210. Re: [TowerTalk] 7-16 Din? (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 21 Apr 2010 16:32:45 +0100
Answers are here: http://tinyurl.com/7-16din In Europe, 7/16 connectors are already coming out of the older generation of cellular sites. They can be found at flea markets for very good prices, becau
/archives//html/Towertalk/2010-04/msg00624.html (8,103 bytes)

211. Re: [TowerTalk] dxengineering U-bolts froze?? (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Thu, 15 Apr 2010 08:15:38 +0100
It was probably 242, as it has been sold in a retail blister pack for many years in the USA. For amateur purposes, 242 and 243 are practically the same and both have a proven long-term track record.
/archives//html/Towertalk/2010-04/msg00472.html (9,581 bytes)

212. Re: [TowerTalk] dxengineering U-bolts froze?? (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 14 Apr 2010 19:23:34 +0100
There are many different kinds of Loctite. Probably the best for general antenna work is blue Loctite 242 or 243. http://www.loctiteproducts.com/products/detail.asp%3fcatid=10&subid=48&pl id=153 Yes
/archives//html/Towertalk/2010-04/msg00441.html (8,978 bytes)

213. Re: [TowerTalk] Pro.Sis.Tel Rotors PST 2051D / PST 61 D (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Tue, 16 Mar 2010 07:19:06 +0000
Exactly which part(s) failed; but also, which other parts survived? It would be good to know the strengths as well as the weaknesses. That's good to know, as I recently installed a 2051. -- 73 from I
/archives//html/Towertalk/2010-03/msg00283.html (8,416 bytes)

214. Re: [TowerTalk] N Connectors (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 10 Feb 2010 08:45:54 +0000
The original MIL pattern N has two serious design problems when connectors are assembled "in the field" without jigs and tooling. One is the very weak cable retention, because the cable is anchored
/archives//html/Towertalk/2010-02/msg00223.html (10,336 bytes)

215. Re: [TowerTalk] Which Type of Loctite Do I Use ? (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Thu, 28 Jan 2010 07:50:11 +0000
Download Loctite's 'product Capability Guide': <http://www.henkelna.com/us/content_data/138230_LT4985TLCapabilityGd.pdf> The selection chart will lead you to Loctite 243 for almost all antenna applic
/archives//html/Towertalk/2010-01/msg00839.html (8,504 bytes)

216. Re: [TowerTalk] solder (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 13 Jan 2010 07:54:09 +0000
Lead-free solder is only of benefit after the equipment has been dumped. Tin/lead solder helps keep equipment from *being* dumped. -- 73 from Ian GM3SEK 'In Practice' columnist for RadCom (RSGB) http
/archives//html/Towertalk/2010-01/msg00247.html (8,732 bytes)

217. Re: [TowerTalk] Ham Radio mag article (score: 104)
Author: "Roger White" <rwhitetexas@verizon.net>
Date: Tue, 12 Jan 2010 16:11:36 -0600
Google came up with this from a QST article that referenced that Ham Radio article: J. J. Nagle, "How To Calculate Wind Loading On Towers And Antenna Structures", Ham Radio, August 1974, Page 16 http
/archives//html/Towertalk/2010-01/msg00233.html (8,997 bytes)

218. Re: [TowerTalk] Seized mast clamp bolts Hy-gain 10 meter yagi (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Mon, 4 Jan 2010 07:34:32 +0000
I've never felt comfortable about using oil- or grease-based materials on threads that are supposed to stay tight afterwards. A lesser-known feature of Loctite and similar thread locking fluids is th
/archives//html/Towertalk/2010-01/msg00084.html (9,705 bytes)

219. Re: [TowerTalk] Cable Glands (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 25 Nov 2009 18:10:21 +0000
Yes, that's why you see them everywhere in professional installations. I've tried everything else in this wet climate, and cable glands are the solution that works every time. The cheap plastic ones
/archives//html/Towertalk/2009-11/msg00452.html (8,526 bytes)

220. Re: [TowerTalk] lowering a lighting tower (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Thu, 1 Oct 2009 16:01:44 +0100
Another question to ask is: "Has anyone greased that winch?" Those fiber pads sure do look dry... -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek _______________________________________________
/archives//html/Towertalk/2009-10/msg00008.html (8,996 bytes)


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