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Total 22 documents matching your query.

1. [TowerTalk] RF Ground is a Myth (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Mon, 19 Jan 2015 10:59:04 -0800; The real issue is that the concept of "RF Ground" is a myth and the result of fuzzy thinking. Part of the reason is what Jim has addressed below. The other reason is simply that a connection to earth; /archives//html/Towertalk/2015-01/msg00318.html (11,627 bytes)
2. Re: [TowerTalk] RF Ground is a Myth (score: 1): Author: Chuck Dietz <w5prchuck@gmail.com>; Date: Mon, 19 Jan 2015 19:19:10 -0600; ground rods on a tower base that is in a good bit of concrete is wasted effort? The tower base and concrete should dissipate most of a lightning strike? Chuck W5PR __________________________________; /archives//html/Towertalk/2015-01/msg00326.html (13,767 bytes)
3. Re: [TowerTalk] RF Ground is a Myth (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Mon, 19 Jan 2015 17:23:38 -0800; You misunderstand what Jim Lux and I have been saying. Accepted good engineering practice for grounding a tower is 2-3 rods extending radially outward from each leg of the tower, bonded to the tower,; /archives//html/Towertalk/2015-01/msg00327.html (14,445 bytes)
4. Re: [TowerTalk] RF Ground is a Myth (score: 1): Author: Brian Carling <bcarling@cfl.rr.com>; Date: Mon, 19 Jan 2015 20:29:20 -0500; The advice varies about this considerably. This week is the first time I've even heard of UF ER or conductive concrete! The professional experts that I know recommend putting a 20 to 30 foot ground r; /archives//html/Towertalk/2015-01/msg00329.html (15,112 bytes)
5. Re: [TowerTalk] RF Ground is a Myth (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Mon, 19 Jan 2015 17:48:00 -0800; It's not anything special concrete-wise. All concrete is pretty conductive, unless you take special efforts to make it an insulator (often by adding fly ash to the aggregate, apparently). It tends to; /archives//html/Towertalk/2015-01/msg00330.html (13,106 bytes)
6. Re: [TowerTalk] RF Ground is a Myth (score: 1): Author: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>; Date: Mon, 19 Jan 2015 20:51:39 -0500; Those aircraft were only running 10W or less, AM VHF rigs. Most of them still do. Hard to imagine, state of the art aircraft still using 10W AM radios. Many of the larger ones now use digital via the; /archives//html/Towertalk/2015-01/msg00331.html (14,883 bytes)
7. Re: [TowerTalk] RF Ground is a Myth (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Mon, 19 Jan 2015 17:55:12 -0800; The professional experts that I know recommend putting a 20 to 30 foot ground rod into the ground at each corner of your house and connecting heavy gauge copper conductors up to lightning rodsup on t; /archives//html/Towertalk/2015-01/msg00332.html (10,303 bytes)
8. Re: [TowerTalk] RF Ground is a Myth (score: 1): Author: "Keith Dutson" <kdutson@sbcglobal.net>; Date: Mon, 19 Jan 2015 20:13:38 -0600; Ward Silver N0AX addresses this subject in detail in his Hands-On Radio article, "The Myth of the RF Ground." It is published in the January 2015 issue of QST. 73, Keith NM5G The real issue is that t; /archives//html/Towertalk/2015-01/msg00333.html (12,871 bytes)
9. Re: [TowerTalk] RF Ground is a Myth (score: 1): Author: "Bill Aycock" <billaycock@mediacombb.net>; Date: Mon, 19 Jan 2015 20:16:05 -0600; Brian-- I worked in a 1000 acre plant that developed Rockets, for 38 years. Every building was on an Ufer ground system, but they were not as simple as has been described here. The buildings had "Fra; /archives//html/Towertalk/2015-01/msg00334.html (17,459 bytes)
10. Re: [TowerTalk] RF Ground is a Myth (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Mon, 19 Jan 2015 18:19:00 -0800; The professional experts that I know recommend putting a 20 to 30 foot ground rod into the ground at each corner of your house and connecting heavy gauge copper conductors up to lightning rodsup on t; /archives//html/Towertalk/2015-01/msg00335.html (13,084 bytes)
11. Re: [TowerTalk] RF Ground is a Myth (score: 1): Author: Mike Reublin NF4L <nf4l@comcast.net>; Date: Mon, 19 Jan 2015 21:52:50 -0500; The electrician I had (who does a LOT of grounding work here) come out to connect my tower ground to the service ground told me he would be glad to drive the extra rods extending out from the tower,; /archives//html/Towertalk/2015-01/msg00337.html (16,300 bytes)
12. Re: [TowerTalk] RF Ground is a Myth (score: 1): Author: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>; Date: Tue, 20 Jan 2015 02:29:54 -0500; The professional experts that I know recommend putting a 20 to 30 foot ground rod into the ground at each corner of your house and connecting heavy gauge copper conductors up to lightning rodsup on t; /archives//html/Towertalk/2015-01/msg00339.html (14,976 bytes)
13. Re: [TowerTalk] RF Ground is a Myth (score: 1): Author: Patrick Greenlee <patrick_g@windstream.net>; Date: Tue, 20 Jan 2015 09:20:52 -0600; I duct taped a 5/8 wave 2M mag mount to a strut on a Cessna 172 and worked a guy mobile in his car nearly 200 miles away on National simplex 146.52 and always wondered how that worked without a groun; /archives//html/Towertalk/2015-01/msg00344.html (15,699 bytes)
14. [TowerTalk] RF Ground is a Myth (score: 1): Author: Spencer <w1gak@centurylink.net>; Date: Wed, 21 Jan 2015 00:52:06 -0700; Don't ever urinate on that wire! _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contestin; /archives//html/Towertalk/2015-01/msg00362.html (6,356 bytes)
15. Re: [TowerTalk] RF Ground is a Myth (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Wed, 21 Jan 2015 19:38:03 -0800; What is the purpose of grounding each tower leg? I have not done this. My towers have tapered pier pin bases and I have lines of ground rods connected to two legs. Even with a straight base I find it; /archives//html/Towertalk/2015-01/msg00384.html (11,111 bytes)
16. Re: [TowerTalk] RF Ground is a Myth (score: 1): Author: "john@kk9a.com" <john@kk9a.com>; Date: Thu, 22 Jan 2015 09:25:01 -0600; I did not noticed that the original post mentioned a 14' base section. I would agree that on big tower bases with separate concrete foundations it would be important to ground each leg. Perhaps this; /archives//html/Towertalk/2015-01/msg00385.html (8,575 bytes)
17. Re: [TowerTalk] RF Ground is a Myth (score: 1): Author: Hans Hammarquist via TowerTalk <towertalk@contesting.com>; Date: Thu, 22 Jan 2015 17:17:31 -0500; Gentlemen, Ithink we can conclude that any "grounding/bonding" systemis "only" for lightning protection and for our safety, andis not that good as an RF ground. RF grounding, when needed, shouldbe tr; /archives//html/Towertalk/2015-01/msg00400.html (9,281 bytes)
18. Re: [TowerTalk] RF Ground is a Myth (score: 1): Author: Brian Carling <bcarling@cfl.rr.com>; Date: Thu, 22 Jan 2015 17:51:51 -0500; Somebody could conclude from this that you should not bother grounding your equipment in the shack if you using a dipole or another antenna that does not work against ground. However I can think of s; /archives//html/Towertalk/2015-01/msg00401.html (10,533 bytes)
19. [TowerTalk] RF Ground is a Myth (score: 1): Author: "Don " <w7wll@arrl.net>; Date: Thu, 22 Jan 2015 19:23:55 -0800; Have been following these posts for the last few weeks expounding on bonding - grounding- common earth- etc as it relates (or doesn't) to RF and lightning and have learned much about the right and wr; /archives//html/Towertalk/2015-01/msg00408.html (10,187 bytes)
20. Re: [TowerTalk] RF Ground is a Myth (score: 1): Author: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>; Date: Thu, 22 Jan 2015 22:26:00 -0500; On 1/22/2015 10:23 PM, Don wrote: Have been following these posts for the last few weeks expounding on bonding - grounding- common earth- etc as it relates (or doesn't) to RF and lightning and have l; /archives//html/Towertalk/2015-01/msg00409.html (10,725 bytes)

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