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Total 26 documents matching your query.

1. [TenTec] Station and AC Ground (score: 1): Author: "JAMES BRASSELL" <jimbrass@bellsouth.net>; Date: Tue, 29 Nov 2005 09:37:24 -0500; Hey, All. Just a quick observation and question. I have read many posts on this site about having the station and AC mains grounds tied together. For my observation, when you have a separate station; /archives//html/TenTec/2005-11/msg00578.html (8,243 bytes)
2. Re: [TenTec] Station and AC Ground (score: 1): Author: "Mike Hyder -N4NT-" <n4nt_m_o_hyder@charter.net>; Date: Tue, 29 Nov 2005 10:44:19 -0500; Problem with this (as I understand the convoluted explanation) is where instead of Zero ohms, you have 0.1 or 0.2 ohms. Then take a lightning strike with a current of maybe 10,000 amps and you will s; /archives//html/TenTec/2005-11/msg00583.html (8,857 bytes)
3. Re: [TenTec] Station and AC Ground (score: 1): Author: "Martin, AA6E" <martin.ewing@gmail.com>; Date: Tue, 29 Nov 2005 10:54:03 -0500; Jim, I'm surprised your grounds are equal "to the microvolt". To me, that indicates that no current is flowing in either, not even reactive, or else they really are bonded together in some way. A pra; /archives//html/TenTec/2005-11/msg00585.html (10,352 bytes)
4. Re: [TenTec] Station and AC Ground (score: 1): Author: "Richard Detweiler" <rdetweil@hotmail.com>; Date: Tue, 29 Nov 2005 10:23:20 -0600; Hi James, I'm no expert, but this is what I understand about grounding. Maybee others can fill in some gaps. Should a lightning strike the AC wires, the AC ground is not enough to dissipate the curre; /archives//html/TenTec/2005-11/msg00586.html (10,938 bytes)
5. Re: [TenTec] Station and AC Ground (score: 1): Author: "JAMES BRASSELL" <jimbrass@bellsouth.net>; Date: Tue, 29 Nov 2005 12:51:01 -0500; Thanks for the comments. My comment to Martin about a direct strike is, 'Forget it'. In the case of a direct strike, there is no system that will absorb it. You can mitigate the damage, but you canno; /archives//html/TenTec/2005-11/msg00587.html (12,455 bytes)
6. Re: [TenTec] Station and AC Ground (score: 1): Author: "Martin, AA6E" <martin.ewing@gmail.com>; Date: Tue, 29 Nov 2005 12:59:22 -0500; [This kind of discussion often happens over at TowerTalk@contesting.com. Search there for lots more info.] Keep in mind there are 3 types of "grounds": RF, AC (power), and lightning protection. (Actu; /archives//html/TenTec/2005-11/msg00589.html (14,055 bytes)
7. Re: [TenTec] Station and AC Ground (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Tue, 29 Nov 2005 16:16:04 -0500; Well....yes and no. Yes, a circuit exists through your radio gear that ties the two grounds together. Depending on the equipment, it might even be a pretty good connection, although not at RF. But if; /archives//html/TenTec/2005-11/msg00594.html (10,176 bytes)
8. Re: [TenTec] Station and AC Ground (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Tue, 29 Nov 2005 16:28:38 -0500; Although I don't know if my system, or anyone's system could really take the full brunt of a direct strike (although I know several have claimed so), I do agree that even a few tenth's of an ohm of r; /archives//html/TenTec/2005-11/msg00595.html (11,933 bytes)
9. Re: [TenTec] Station and AC Ground (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Tue, 29 Nov 2005 16:37:44 -0500; Or....a half wave ground wire, to repeat the low impedance at earth right at the radio. And, since lightning is RF, I feel that a real RF ground is important, even for lightning. 73 de Gary, AA2IZ _; /archives//html/TenTec/2005-11/msg00596.html (8,571 bytes)
10. Re: [TenTec] Station and AC Ground (score: 1): Author: "Martin, AA6E" <martin.ewing@gmail.com>; Date: Tue, 29 Nov 2005 17:25:34 -0500; You can have a tuned "ground" but it only works at discrete frequencies. Besides, any current-carrying wire of appreciable length, tuned or not, becomes part of your antenna system. If, as it should,; /archives//html/TenTec/2005-11/msg00598.html (10,019 bytes)
11. Re: [TenTec] Station and AC Ground (score: 1): Author: Robert & Linda McGraw K4TAX <RMcGraw@Blomand.Net>; Date: Wed, 30 Nov 2005 07:52:47 -0600; If you have a "tuned" ground system, consider that it is part of the radiating system. Otherwise, your ground is radiating RF. If current flows on a conductor, it radiates. Usually this is an invitat; /archives//html/TenTec/2005-11/msg00623.html (11,783 bytes)
12. Re: [TenTec] Station and AC Ground (score: 1): Author: Robert & Linda McGraw K4TAX <RMcGraw@Blomand.Net>; Date: Wed, 30 Nov 2005 07:49:40 -0600; Any attempt to provide ground for lightning protection MUST be outside of the structure. No exceptions unless you want a visit from the local fire department. In which case, they may be able to save; /archives//html/TenTec/2005-11/msg00624.html (10,401 bytes)
13. Re: [TenTec] Station and AC Ground (score: 1): Author: "ROBERT CARROLL" <w2wg@comcast.net>; Date: Wed, 30 Nov 2005 09:42:29 -0500; With a truly balanced antenna there should be no RF current from the station to ground. If you are on the second or third floor and a long way from the house ground--which is probably a very poor RF; /archives//html/TenTec/2005-11/msg00628.html (14,809 bytes)
14. Re: [TenTec] Station and AC Ground (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Wed, 30 Nov 2005 17:32:13 -0500; Well.....If I had appreciable amounts of RF on the outside of my coax, which I don't due to the heavy chokes I use at the ends, then I can imagine a path for RF to flow from my power amplifier into t; /archives//html/TenTec/2005-11/msg00642.html (10,971 bytes)
15. Re: [TenTec] Station and AC Ground (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Wed, 30 Nov 2005 17:56:58 -0500; See my other reply on this subject. No source, in my setup, for any appreciable current to flow on this ground path. No more than there normally is on anyone's ground path. Of course, as has been wri; /archives//html/TenTec/2005-11/msg00644.html (10,051 bytes)
16. Re: [TenTec] Station and AC Ground (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Wed, 30 Nov 2005 18:01:48 -0500; station the close But, as you also said, there should be no current in it. I don't advocate using the half wave ground in a vacuum, that is, without taking the other necessary steps also. You must ch; /archives//html/TenTec/2005-11/msg00645.html (9,645 bytes)
17. Re: [TenTec] Station and AC Ground (score: 1): Author: "Richard Detweiler" <rdetweil@hotmail.com>; Date: Wed, 30 Nov 2005 18:48:58 -0600; Just a side point, If you are having rf currents on the outside of your coax, there will be alot of problems, from RFI at the minimum to damaging the radio in the extreme. Ever feel a RF Burn? They m; /archives//html/TenTec/2005-11/msg00647.html (10,828 bytes)
18. Re: [TenTec] Station and AC Ground (score: 1): Author: "Lyle Dunlap" <lyle3dd@grics.net>; Date: Wed, 30 Nov 2005 19:58:29 -0600; RF Burn: Try about 15 amps coming up through a lead pencil on 106 KCS. Lyle W9FCX lyle3dd@grics.net _______________________________________________ TenTec mailing list TenTec@contesting.com http://li; /archives//html/TenTec/2005-11/msg00649.html (9,022 bytes)
19. Re: [TenTec] Station and AC Ground (score: 1): Author: "ROBERT CARROLL" <w2wg@comcast.net>; Date: Wed, 30 Nov 2005 21:41:43 -0500; I can't say just what it is, but the pain of an RF burn is unlike anything else. I got quite a few back in Novice and General days but learned my lesson. The Palomar clamp on RF meter has been a very; /archives//html/TenTec/2005-11/msg00653.html (11,780 bytes)
20. Re: [TenTec] Station and AC Ground (score: 1): Author: "Richard Detweiler" <rdetweil@hotmail.com>; Date: Wed, 30 Nov 2005 20:43:33 -0600; No thanks, That stuf blows holes in flesh.... Best wishes, Rich K5SF _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/list; /archives//html/TenTec/2005-11/msg00654.html (9,452 bytes)

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