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Total 15 documents matching your query.

1. [RFI] Single-point grounding (score: 1): Author: Pete Smith N4ZR <n4zr@contesting.com>; Date: Sun, 01 Jul 2012 10:28:56 -0400; I'm not sure exactly where I should post this, but suspect that this group probably has more relevant expertise than most, so please bear with me. In the last year, I have had two expensive episodes.; /archives//html/RFI/2012-07/msg00000.html (7,772 bytes)
2. Re: [RFI] Single-point grounding (score: 1): Author: "Bob Turner" <Bob@n2scj.net>; Date: Sun, 1 Jul 2012 10:54:04 -0400; I recently had to add my computer to my single point grounding system. Apparently the computer chassis potential was slightly different than the chassis potential on my FT-7800 transceiver. I feed th; /archives//html/RFI/2012-07/msg00001.html (9,615 bytes)
3. Re: [RFI] Single-point grounding (score: 1): Author: "K1TTT" <K1TTT@ARRL.NET>; Date: Sun, 01 Jul 2012 14:58:48 +0000; That would seem adequate... I just run a piece of 4/0 wire around the baseboard and go up the back of each operating table with a piece just hose clamped to it then unwrap strands to go to the radio,; /archives//html/RFI/2012-07/msg00002.html (8,965 bytes)
4. Re: [RFI] Single-point grounding (score: 1): Author: "Bob Turner" <Bob@n2scj.net>; Date: Sun, 1 Jul 2012 12:24:50 -0400; Correction NO more hum. Corrected below. I recently had to add my computer to my single point grounding system. Apparently the computer chassis potential was slightly different than the chassis poten; /archives//html/RFI/2012-07/msg00003.html (10,953 bytes)
5. Re: [RFI] Single-point grounding (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Sun, 01 Jul 2012 10:44:44 -0600; There is a 3 part series on the ARRL web site about lightening protection. http://www.arrl.org/lightning-protection Tom W0IVJ _______________________________________________ RFI mailing list RFI@cont; /archives//html/RFI/2012-07/msg00004.html (9,527 bytes)
6. Re: [RFI] Single-point grounding (score: 1): Author: Larry Benko <xxw0qe@comcast.net>; Date: Sun, 01 Jul 2012 10:55:33 -0600; Also see http://www.lightningsafety.com/nlsi_lhm/IEEE_Guide.pdf for a lightning protection guide from IEEE. Larry, W0QE _______________________________________________ RFI mailing list RFI@contesting; /archives//html/RFI/2012-07/msg00005.html (6,938 bytes)
7. Re: [RFI] Single-point grounding (score: 1): Author: Pete Smith N4ZR <n4zr@contesting.com>; Date: Sun, 01 Jul 2012 13:42:15 -0400; Sorry, I guess I should have made this clear - the lightning events in question have been nearby, not direct hits. I disconnect everything at the entry panel, an approach that has weathered one direc; /archives//html/RFI/2012-07/msg00006.html (10,462 bytes)
8. Re: [RFI] Single-point grounding (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sun, 01 Jul 2012 12:52:08 -0700; I'm a strong advocate of that, but there's more to it. The fundamental problem is that we have many pieces of equipment that have unbalanced connections between them, and that are connected to ground; /archives//html/RFI/2012-07/msg00007.html (11,706 bytes)
9. Re: [RFI] Single-point grounding (score: 1): Author: "Ed K0iL" <eddieedwards@tconl.com>; Date: Sun, 1 Jul 2012 15:16:44 -0500; To keep impedance/inductance as low as possible, I've heard that all bonding connections should not only be short, but also should not have any sharp bends or turns. Nothing tighter than an 8"-10" ra; /archives//html/RFI/2012-07/msg00008.html (8,544 bytes)
10. Re: [RFI] Single-point grounding (score: 1): Author: Pete Smith N4ZR <n4zr@contesting.com>; Date: Sun, 01 Jul 2012 17:12:48 -0400; Sorry all, I inadvertently used a term of art - "entry panel" - by which I really meant the aluminum panel on which all of my coax and control jacks are mounted, set in a 2nd floor double-hung window; /archives//html/RFI/2012-07/msg00010.html (9,162 bytes)
11. Re: [RFI] Single-point grounding (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Sun, 01 Jul 2012 19:07:42 -0400; Like Jim, I'm a strong proponent of the Single Point Ground (SPG) but there are additional factors to be taken into account when other services are taken into account, even if they all enter through; /archives//html/RFI/2012-07/msg00013.html (17,457 bytes)
12. Re: [RFI] Single-point grounding (score: 1): Author: "Dale Svetanoff" <svetanoff@earthlink.net>; Date: Sun, 1 Jul 2012 21:06:58 -0500; Roger, Just a few remarks: 1. YES, all I/O cables between the house and outside world need to pass thru a common grounding panel. The fact that I have 2 such panels, at opposite ends of the house, do; /archives//html/RFI/2012-07/msg00015.html (21,343 bytes)
13. Re: [RFI] Single-point grounding (score: 1): Author: David Robbins <k1ttt@verizon.net>; Date: Mon, 02 Jul 2012 06:35:02 -0500 (CDT); short = straight bends = not shortest path loops = multiple bends a widely published lightning expert who advises me has told me that he knows of no reason why bends are bad for lightning ground exce; /archives//html/RFI/2012-07/msg00018.html (10,170 bytes)
14. Re: [RFI] Single-point grounding (score: 1): Author: Pete Smith N4ZR <n4zr@contesting.com>; Date: Mon, 02 Jul 2012 09:02:22 -0400; I actually took a third path - the computer with the RS-232 connection is attached to my ground bus no more than an inch from where the transceiver's chassis is connected, and both ground leads are n; /archives//html/RFI/2012-07/msg00020.html (11,484 bytes)
15. Re: [RFI] Single-point grounding (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Mon, 02 Jul 2012 08:54:56 -0700; To clarify, what Dave has correctly observed is the MAGNETIC loop formed by the signal return in the control cable and the bonding path. And, as he observed, the induced voltage and current are propo; /archives//html/RFI/2012-07/msg00024.html (8,829 bytes)

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