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1. [TowerTalk] Fields and coax (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sun, 24 Jul 2005 06:59:47 -0400; a magnetic materials copper or is why it pipes no-no. You choke. He's totally wrong Bill. I hope you corrected him on that!! The time-varying magnetic field is fully shielded by the shield just as t; /archives//html/Towertalk/2005-07/msg00654.html (9,483 bytes)
2. Re: [TowerTalk] Fields and coax (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Sun, 24 Jul 2005 10:20:40 -0500; Yes. BUT: Below radio frequencies, a cable "shield" provides magnetic field rejection NOT by shielding (because it is far too thin in terms of skin depth to provide shielding), but by virtue of the p; /archives//html/Towertalk/2005-07/msg00663.html (10,441 bytes)
3. [TowerTalk] Fields and coax (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Sun, 24 Jul 2005 16:36:15 +0100 (BST); Tom's post is exactly correct except to a nit-picker... I hate to disagree Tom, but there is always an external field even with perfectly shielded coaxial cable. This is because the outer conductor h; /archives//html/Towertalk/2005-07/msg00665.html (7,640 bytes)
4. Re: [TowerTalk] Fields and coax (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Sun, 24 Jul 2005 11:27:52 -0500; What do you mean by "perfect?" Perfect means that there would be no external field, perfect uniformity of shield current around the circumference of the shield, no "holes" in the shield, and implies; /archives//html/Towertalk/2005-07/msg00669.html (7,858 bytes)
5. Re: [TowerTalk] Fields and coax (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sun, 24 Jul 2005 12:51:31 -0400; know frequency (nowhere near and all field of the idea, in The original comment was coiling the coax it was a problem at radio frequencies and especially at VHF because it added inductive reactance; /archives//html/Towertalk/2005-07/msg00671.html (9,321 bytes)
6. [TowerTalk] Fields and coax (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Sun, 24 Jul 2005 20:55:41 +0100 (BST); Exactly that. A 100% coverage, perfectly uniform, perfectly conducting shield which is of course not possible in the real world. If that perfect shield has a finite thickness, which it has to have in; /archives//html/Towertalk/2005-07/msg00686.html (8,144 bytes)
7. Re: [TowerTalk] Fields and coax (score: 1): Author: Gary <gaschafer@comcast.net>; Date: Sun, 24 Jul 2005 18:02:02 -0400; Look up "transfer impedance" on google. It makes for some interesting reading. It is also how lightning energy gets onto the center conductor of a cable that has a grounded antenna or short at the an; /archives//html/Towertalk/2005-07/msg00701.html (8,730 bytes)

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