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41. Re: [TowerTalk] Station Ground (score: 1): Author: "K8RI on Tower Talk" <k8ri-tower@charter.net>; Date: Sat, 15 Jan 2005 03:36:18 -0500; One thing about that third "green wire I keep hearing about". Only one piece of modern radio gear has that thrid green wire. On all the other pieces the green wire goes only to the power supply and t; /archives//html/Towertalk/2005-01/msg00553.html (9,052 bytes)
42. Re: [TowerTalk] Station Ground (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sat, 15 Jan 2005 07:55:44 -0500; pieces of to one piece of ground window. If you build your station to code or use common sense on external cable and power entry that will never be a major issue. another piece of it's way to have s; /archives//html/Towertalk/2005-01/msg00554.html (10,557 bytes)
43. Re: [TowerTalk] Station Ground (score: 1): Author: "Jim Lux" <jimlux@earthlink.net>; Date: Sat, 15 Jan 2005 06:17:54 -0800; is The classic ground loop problem is in single ended low level audio signals (Where microvolts count), and where the dominant interference source is 60 Hz magnetic fields inducing a current in the l; /archives//html/Towertalk/2005-01/msg00556.html (11,192 bytes)
44. Re: [TowerTalk] Station Ground (score: 1): Author: "Jim Lux" <jimlux@earthlink.net>; Date: Sat, 15 Jan 2005 06:23:53 -0800; system experimentally Was the audio transformer coupled, or direct coupled? Was there a break in the audio ground side? (so that the "ground reference" for the two single ended audio signals was the; /archives//html/Towertalk/2005-01/msg00557.html (9,718 bytes)
45. Re: [TowerTalk] Station Ground (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sat, 15 Jan 2005 10:35:31 -0500; substantial current, It almost seems like we make extreme circumstances that are largely if not totally non-issues into answers for general or worse yet entirely different applications. The mobile r; /archives//html/Towertalk/2005-01/msg00558.html (12,679 bytes)
46. Re: [TowerTalk] Station Ground (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sat, 15 Jan 2005 10:38:23 -0500; ham equipment manufacturers usually Since I designed equipment for manufacturers I can tell you why it is done. Manufacturers do it because the ground is both helpful and desirable, and never harmfu; /archives//html/Towertalk/2005-01/msg00559.html (10,023 bytes)
47. Re: [TowerTalk] Station Ground (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sat, 15 Jan 2005 13:48:52 -0500; tubing for the bus bar equipment, I found that keying" I had fairly few millivolts it by directly to one another "ground reference" Jim's answer is a good one that most people miss. The ONLY place a; /archives//html/Towertalk/2005-01/msg00566.html (9,886 bytes)
48. Re: [TowerTalk] Station Ground (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sat, 15 Jan 2005 14:01:08 -0500; your station equipment to your through a PolyPhaser station is on a large desk is a packet, and We should always run a common low resistance buss along the bench and tie everything to it. That buss; /archives//html/Towertalk/2005-01/msg00567.html (11,143 bytes)
49. Re: [TowerTalk] Station Ground (score: 1): Author: "Alan NV8A (ex. AB2OS)" <nv8a@att.net>; Date: Sat, 15 Jan 2005 14:33:33 -0500; Maybe I have misunderstood what I have read about the National Electric Code, but your suggestion about having a ground bus connected to the *neutral* sounds like a violation because it could establi; /archives//html/Towertalk/2005-01/msg00568.html (10,979 bytes)
50. Re: [TowerTalk] Station Ground (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sat, 15 Jan 2005 14:43:34 -0500; National Electric connected to the establish a connect to this the green wire (which typically No, I misspoke. I should have said safety ground, not neutral. The neutral should only be grounded at t; /archives//html/Towertalk/2005-01/msg00569.html (10,248 bytes)
51. Re: [TowerTalk] Station Ground (score: 1): Author: "K8RI on Tower Talk" <k8ri-tower@charter.net>; Date: Sat, 15 Jan 2005 15:24:28 -0500; your station equipment to your In that case, explain this: I should have added what was in an earlier post: Each piece of equipment is tied to a #2 coper cable with (1/2" braid/shield) that runs alo; /archives//html/Towertalk/2005-01/msg00570.html (13,527 bytes)
52. RE: [TowerTalk] Station Ground (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Sat, 15 Jan 2005 14:27:34 -0600; You were experiencing a "pin 1 problem," probably in both the computer and the radio. Nearly all computer sound cards are built with pin 1 problems, and so are nearly all ham rigs. The correct connec; /archives//html/Towertalk/2005-01/msg00572.html (12,166 bytes)
53. Re: [TowerTalk] Station Ground (score: 1): Author: "Michael Tope" <W4EF@dellroy.com>; Date: Sat, 15 Jan 2005 08:38:41 -0800; Okay, I'll bite, Tom. Why is it stupid to run the negative lead from my rig directly to the battery? I did this in my truck. Is the main concern failure of the main chassis to battery negative connec; /archives//html/Towertalk/2005-01/msg00574.html (11,033 bytes)
54. Re: [TowerTalk] Station Ground (score: 1): Author: "Frank Donovan" <donovanf@erols.com>; Date: Sat, 15 Jan 2005 16:05:29 -0500; Several posts in this thread made reference to the use of braided bonding straps in grounding systems. One post even provided photographs that showed his use of braid in his station. Braid should nev; /archives//html/Towertalk/2005-01/msg00575.html (10,282 bytes)
55. Re: [TowerTalk] Station Ground (score: 1): Author: "K8RI on Tower Talk" <k8ri-tower@charter.net>; Date: Sat, 15 Jan 2005 18:46:37 -0500; On Sat, 15 Jan 2005 03:16:11 -0500, Pete Smith wrote: I had fairly severe AC hum on the audio, apparently the result of a few millivolts potential difference between chassis. I finally cured it by ex; /archives//html/Towertalk/2005-01/msg00577.html (11,968 bytes)
56. Re: [TowerTalk] Station Ground (score: 1): Author: "K8RI on Tower Talk" <k8ri-tower@charter.net>; Date: Sat, 15 Jan 2005 18:51:55 -0500; -- Original Message -- From: "Tom Rauch" <w8ji@contesting.com> If that lead through some error (almost certainly by a goofball at the local repair garage) somehow becomes unbol;ted from the very larg; /archives//html/Towertalk/2005-01/msg00578.html (12,676 bytes)
57. Re: [TowerTalk] Station Ground (score: 1): Author: "Jim Lux" <jimlux@earthlink.net>; Date: Sat, 15 Jan 2005 16:02:51 -0800; Life isn't made much easier by having virtually all consumer oriented equipment (which includes most ham gear) use single ended audio, and the lack of ready availability of shielded cables with the; /archives//html/Towertalk/2005-01/msg00579.html (10,900 bytes)
58. Re: [TowerTalk] Station Ground (score: 1): Author: "Jim Lux" <jimlux@earthlink.net>; Date: Sat, 15 Jan 2005 16:08:55 -0800; That one might get you in trouble with the electrical code inspector. I think (but can't find my code handy) that the neutral and electrical safety ground are supposed to be bonded at only one point,; /archives//html/Towertalk/2005-01/msg00580.html (10,948 bytes)
59. Re: [TowerTalk] Station Ground (score: 1): Author: "Jim Lux" <jimlux@earthlink.net>; Date: Sat, 15 Jan 2005 16:23:44 -0800; to When I was trying to install my screwdriver antenna on a 2001 Passat, I was astounded at the lack of electrical "unibodiness" (and for that matter, the amount of structural composites, insulating; /archives//html/Towertalk/2005-01/msg00581.html (11,935 bytes)
60. RE: [TowerTalk] Station Ground (score: 1): Author: "Paul Playford" <w8aef@worldnet.att.net>; Date: Sun, 16 Jan 2005 00:25:58 -0000; Please excuse the following rant but PL-259's and coax light my fire. Of several hundred (thousands) of PL-259's (on RG-8 or similar) I have seen very, very few that are securely or otherwise attache; /archives//html/Towertalk/2005-01/msg00582.html (10,681 bytes)

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