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Total 12 documents matching your query.

1. Topband: Lightning Protection (score: 1): Author: peter.sally@pacific.net.sg (Peter Cook); Date: Sun, 16 Sep 2001 13:33:17 +0800; Folks, I'm after some advice on lightning protection. I have just put up a center fed half wave dipole for 160m between the roofs of two 20 storey condominium blocks. I live on the 10th floor of one; /archives//html/Topband/2001-09/msg00063.html (7,994 bytes)
2. Topband: Lightning Protection (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sun, 16 Sep 2001 14:56:22 -0400; Water pipes are next to useless for lightning protection Peter, although they do make excellent safety grounds. It takes a large mat with multiple grounds to establish a really good lightning ground; /archives//html/Topband/2001-09/msg00076.html (8,740 bytes)
3. Topband: Lightning Protection (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Mon, 17 Sep 2001 02:03:00 +0100; Tom W8JI Said: Water pipes are next to useless for lightning protection Peter, although they do make excellent safety grounds. It takes a large mat with multiple grounds to establish a really good li; /archives//html/Topband/2001-09/msg00077.html (8,509 bytes)
4. Topband: Lightning Protection (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Mon, 17 Sep 2001 21:21:54 -0400; Tom W8JI Said: The cause of lightning discharge is the large voltage gradient between earth and a cluster of charged moisture in the air. The only way to remove the charge is to have an actual path b; /archives//html/Topband/2001-09/msg00093.html (12,297 bytes)
5. Topband: Lightning Protection (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 18 Sep 2001 09:56:30 -0400; I replied to KN4LF off the reflector, and he requoted me here. So I guess I'll respond here on the reflector. That's right. The little whiskers do absolutely nothing to discharge the cloud. A spiked; /archives//html/Topband/2001-09/msg00103.html (9,974 bytes)
6. Topband: Lightning Protection (score: 1): Author: W4EF@dellroy.com (Mike); Date: Wed, 19 Sep 2001 13:05:34 +0100; The pointed static dischargers mentioned in this discussion are used on almost every commercial and military aircraft in the world (take a look next time you go to an air show). The explanation that; /archives//html/Topband/2001-09/msg00106.html (7,877 bytes)
7. Topband: Lightning Protection (score: 1): Author: aa1bu@earthlink.net (Joe Gagliardi); Date: Wed, 19 Sep 2001 22:52:20 +0100; Lightning Prevention Systems of Berlin, NJ has a wealth of tech. info on this subject. http://www.Ipsnet.com Joe; /archives//html/Topband/2001-09/msg00108.html (7,199 bytes)
8. Topband: lightning protection (score: 1): Author: Craig Clark <jcclark@wildblue.net>; Date: Mon, 16 Jun 2008 09:43:51 -0400; FYI Quoting from the ICE catalog: "All 300 series units feature heavy discharge torodial inductors used to neutralize developed voltages on the antenna side of a central high voltage blocking capacit; /archives//html/Topband/2008-06/msg00040.html (7,254 bytes)
9. Topband: Lightning protection (score: 1): Author: HAROLD SMITH JR <w0rihps@sbcglobal.net>; Date: Fri, 27 Jul 2012 08:06:04 -0700 (PDT); About 20 years ago I decided to do something about lightning protection. My tower is 80 feet of Rohn 45G, with a 5el Telrex monoband 20 meter yagi at 82 feet. Hygain 153BAS at 90 feet and Hygain 103B; /archives//html/Topband/2012-07/msg00363.html (7,688 bytes)
10. Re: Topband: Lightning protection (score: 1): Author: DAVID CUTHBERT <telegrapher9@gmail.com>; Date: Fri, 27 Jul 2012 09:36:03 -0600; A low impedance tower ground is important. Google TOWER FOOTING RESISTANCE for an IEEE ppt. on this. I would aim for a couple of ohms. That means several long rods. __________________________________; /archives//html/Topband/2012-07/msg00366.html (8,267 bytes)
11. Re: Topband: Lightning protection (score: 1): Author: HAROLD SMITH JR <w0rihps@sbcglobal.net>; Date: Fri, 27 Jul 2012 09:30:58 -0700 (PDT); A low impedance tower ground is important. Google TOWER FOOTING RESISTANCE for an IEEE ppt. on this. I would aim for a couple of ohms. That means several long rods. Dave WX7G Dave, Of course a low im; /archives//html/Topband/2012-07/msg00370.html (7,406 bytes)
12. Re: Topband: Lightning protection (score: 1): Author: "ZR" <zr@jeremy.mv.com>; Date: Fri, 27 Jul 2012 20:04:02 -0400; That doesnt work for us that have solid rock as the tower base. My 180' has solid granite at 8-14" below grade and the other 3 towers arent much better, I think the deepest spot is 2' of sandy gravel; /archives//html/Topband/2012-07/msg00381.html (9,783 bytes)

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