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Re: [TowerTalk] Shack ground

To: "Tower Talk List" <towertalk@contesting.com>
Subject: Re: [TowerTalk] Shack ground
From: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 17 Jun 2010 13:18:47 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
On Thu, 17 Jun 2010 15:19:51 -0400, Mickey Baker wrote:

>Jim's statement about lightning having "its energy centered around the AM 
>broadcast band" is factually incorrect. 

You're fighting with IEEE on that one. It's the result of their studies. 
You're also fighting the laws of physics. :) 

>Even if it were correct, nothing passive has a lower impedance than a 
>large, straight conductor in a line between two points.

It is WELL KNOWN that the impedance of a straight conductor longer than a 
few feet is dominated by INDUCTANCE, not RESISTANCE at 1 MHz. Inductance 
can be reduced by running multiple conductors in parallel, but not in such 
close proximity that there is significant mutual inductance between them. 

73, Jim K9YC


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