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Total 18 documents matching your query.

1. [TowerTalk] Tower grounds (score: 1): Author: "Rick Kiessig" <kiessig@gmail.com>; Date: Wed, 13 Jun 2012 12:18:04 +1200; Is there a good rule-of-thumb for how many ground rods to use for a tower, and how deep they should be? Does the diameter of the rods make any difference? Is it worth keeping grounds for lightning pr; /archives//html/Towertalk/2012-06/msg00110.html (6,610 bytes)
2. Re: [TowerTalk] Tower grounds (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Tue, 12 Jun 2012 20:03:54 -0700; not really.. more contact area with soil is better, but you can bury the rod sideways. Does the diameter of the rods make any no.. Is it worth keeping grounds for lightning protection (tower no _____; /archives//html/Towertalk/2012-06/msg00112.html (7,382 bytes)
3. Re: [TowerTalk] Tower grounds (score: 1): Author: "John Langdon" <jlangdon@outer.net>; Date: Wed, 13 Jun 2012 04:46:38 -0500; Start with your soil: low or high conductivity, wet or dry, as the basis for decisions. You are ahead to recognize there are two grounds: one for lightening protection, the other for radio frequencie; /archives//html/Towertalk/2012-06/msg00113.html (9,043 bytes)
4. Re: [TowerTalk] Tower grounds (score: 1): Author: David Robbins <k1ttt@verizon.net>; Date: Wed, 13 Jun 2012 06:53:02 -0500 (CDT); no, there is either NO ground, or ONE ground, or 3 grounds, depending on who you talk to and about what type of phenomena... There is NO ground when you talk about lightning or rf and your component; /archives//html/Towertalk/2012-06/msg00114.html (9,225 bytes)
5. Re: [TowerTalk] Tower grounds (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Wed, 13 Jun 2012 05:44:37 -0700; For lightning (but not RF) strap does not provide a significantly better ground than wire. Lightning grounding is all about inductance, not AC resistance, and the inductance isn't greatly affected by; /archives//html/Towertalk/2012-06/msg00115.html (13,336 bytes)
6. Re: [TowerTalk] Tower grounds (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Wed, 13 Jun 2012 05:51:15 -0700; This is why the emphasis on "bond everything together" at the entrance to the building in the NEC. It may seem quite dorky, but that little grounding block for cable TV or satellite installation actu; /archives//html/Towertalk/2012-06/msg00116.html (11,372 bytes)
7. Re: [TowerTalk] Tower grounds (score: 1): Author: "davidrobbins" <davidrobbins@ieee.org>; Date: Wed, 13 Jun 2012 00:32:22 +0000; First of course you should note that there is no such thing as ground when it comes to rf or lightning... that being said, all the ground conductors must be tied together at least at the entrance to; /archives//html/Towertalk/2012-06/msg00117.html (8,649 bytes)
8. Re: [TowerTalk] Tower grounds (score: 1): Author: K8RI <K8RI-on-TowerTalk@tm.net>; Date: Wed, 13 Jun 2012 09:21:48 -0400; Yah, but... For one of the authorities on lightning and protection go to http://www.protectiongroup.com/PolyPhaser And it usually makes no difference *IF* proper grounding is used. IE all components; /archives//html/Towertalk/2012-06/msg00118.html (14,249 bytes)
9. Re: [TowerTalk] Tower grounds (score: 1): Author: "John Langdon" <jlangdon@outer.net>; Date: Wed, 13 Jun 2012 09:46:14 -0500; I favor the strap over wire for lighting because of the larger surface area bang for the buck. Also, there are really three grounds to consider: lightning, radio, and legal/building code ground. 73 J; /archives//html/Towertalk/2012-06/msg00119.html (14,469 bytes)
10. Re: [TowerTalk] Tower grounds (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Wed, 13 Jun 2012 07:58:34 -0700; it would be the (very) rare lightning strike with a rise time faster than 1 microsecond. The vast majority of "lightning induced transients" (which includes both direct strikes and induced transients; /archives//html/Towertalk/2012-06/msg00120.html (15,978 bytes)
11. Re: [TowerTalk] Tower grounds (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Wed, 13 Jun 2012 08:02:13 -0700; but surface area doesn't buy you anything for lightning or electrical safety grounds. increasing surface area doesn't markedly reduce the inductance. All it does is decrease the AC resistance (skin e; /archives//html/Towertalk/2012-06/msg00121.html (8,865 bytes)
12. Re: [TowerTalk] Tower grounds (score: 1): Author: trentkd5ia@aol.com; Date: Wed, 13 Jun 2012 16:18:00 -0400 (EDT); There is NO ground when you talk about lightning or rf and your components are more than a few meters apart (or less if you are talking vhf/uhf/microwave). If your tower is not right next to the shac; /archives//html/Towertalk/2012-06/msg00126.html (9,092 bytes)
13. Re: [TowerTalk] Tower grounds (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Thu, 14 Jun 2012 19:05:07 -0400; It has often been said, by Polyphaser, that "a good lightning ground also makes a good broadcast band antenna ground". This implies that all of the things that make a good antenna ground are also nec; /archives//html/Towertalk/2012-06/msg00142.html (10,394 bytes)
14. Re: [TowerTalk] Tower grounds (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Fri, 15 Jun 2012 06:18:30 -0700; It's more the reverse of that.. a good broadcast band antenna (500-1600 kHz) ground makes a good lightning ground. I wouldn't say "necessary" for a lightning ground .. for example IR loss in a lightn; /archives//html/Towertalk/2012-06/msg00145.html (10,177 bytes)
15. [TowerTalk] Tower Grounds (score: 1): Author: "Cougercat" <felix1063@comcast.net>; Date: Sun, 15 Oct 2017 17:47:20 -0700; Hello All, Has anybody had any experience with grounding towers with flat copper strap v.s. using stranded wire or copper braid (tinned or untinned)? A friend of mine who use to work for one of the m; /archives//html/Towertalk/2017-10/msg00240.html (7,366 bytes)
16. Re: [TowerTalk] Tower Grounds (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sun, 15 Oct 2017 21:24:12 -0700; In general, bare braided cable should NEVER be used outdoors or in wet locations, primarily because it corrodes/oxidizes and degrades conductivity. Over the years, I've seen the noise issue discussed; /archives//html/Towertalk/2017-10/msg00248.html (8,444 bytes)
17. Re: [TowerTalk] Tower Grounds (score: 1): Author: "Keith Dutson" <kdutson@sbcglobal.net>; Date: Mon, 16 Oct 2017 07:55:24 -0500; I use the same thing found on many power poles, 2 gauge tinned copper wire. This is cadwelded to the ground rod. Keith NM5G Hello All, Has anybody had any experience with grounding towers with flat c; /archives//html/Towertalk/2017-10/msg00257.html (8,264 bytes)
18. Re: [TowerTalk] Tower Grounds (score: 1): Author: "john@kk9a.com" <john@kk9a.com>; Date: Tue, 17 Oct 2017 13:39:29 -0400; There are also no bolts for attachment on tapered pier pin bases. John KK9A Not every tower is bolted to a base plate set in concrete. Many of us, me included, bury 4 ft or so of the lower tower segm; /archives//html/Towertalk/2017-10/msg00324.html (8,587 bytes)

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