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1. [TowerTalk] Grounding a vertical (score: 1): Author: "Mike Bragassa, K5UO" <bragassa@consolidated.net>; Date: Sun, 26 Mar 2006 08:43:28 -0600; ...speaking of lightning: What is a simple and effective ground for my base-loaded 80 meter vertical (Rohn 25g)? "Spark gap": How can one be made and what gap is correct? Thanks! Mike, K5UO _________; /archives//html/Towertalk/2006-03/msg00543.html (7,056 bytes)
2. Re: [TowerTalk] Grounding a vertical (score: 1): Author: "Mirko Sibilja" <s57ad@amis.net>; Date: Sun, 26 Mar 2006 16:54:18 +0200; If tower is not grounded, use RF choke (available at Array Solutions). If tower is grounded (shunt fed), use RF choke too, from coax inner lead to ground. At our club's field day activities we use ba; /archives//html/Towertalk/2006-03/msg00544.html (7,949 bytes)
3. Re: [TowerTalk] Grounding a vertical (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Sun, 26 Mar 2006 07:39:43 -0800; In a uniform field gap (which you are not likely to get, but more later), breakdown, in air, at sea level, is about 70 kV/inch (or 30kV/cm). Almost any practical gap will breakdown at a lower voltage; /archives//html/Towertalk/2006-03/msg00545.html (9,150 bytes)
4. Re: [TowerTalk] Grounding a vertical (score: 1): Author: Red <RedHaines@centurytel.net>; Date: Sun, 26 Mar 2006 09:59:52 -0600; Greetings, TowerTalkers; Regarding spark gaps and shunting static and lightning transients from vertical antennas: I refer you to "Lightning: Physics and Effects," by Vladimir Rakov and Martin Uman,; /archives//html/Towertalk/2006-03/msg00547.html (10,945 bytes)
5. Re: [TowerTalk] Grounding a vertical (score: 1): Author: ersmar@comcast.net; Date: Sun, 26 Mar 2006 16:57:01 +0000; TT: I found these articles to be of value in understanding how arresters from Polyphaser, ICE and Delta operate: http://www.iceradioproducts.com/33.htm http://www.iceradioproducts.com/33a.htm . Both; /archives//html/Towertalk/2006-03/msg00548.html (11,136 bytes)
6. Re: [TowerTalk] Grounding a vertical (score: 1): Author: Red <RedHaines@centurytel.net>; Date: Sun, 26 Mar 2006 11:27:16 -0600; Hi, Gene; I agree that the informed ham should read ICE's material. The informed ham should also read PolyPhaser's Tech Notes and the book PP publishes. The informed ham must also recognize some bias; /archives//html/Towertalk/2006-03/msg00549.html (12,450 bytes)
7. Re: [TowerTalk] Grounding a vertical (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Sun, 26 Mar 2006 10:51:04 -0800; Gas discharge tubes and open gaps also have some capacitance. (several pF or more wouldn't be unusual, for the little 300V tubes) You can also use a gas with a lower "minimum sparking voltage" than a; /archives//html/Towertalk/2006-03/msg00550.html (10,627 bytes)

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