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RE: [TowerTalk] Formula

To: "Richard Karlquist" <richard@karlquist.com>,"stephen rutherford" <sprutherford.bunny@comcast.net>,<towertalk@contesting.com>
Subject: RE: [TowerTalk] Formula
From: Pete Smith <n4zr@contesting.com>
Date: Thu, 23 Oct 2003 09:11:49 -0400
List-post: <mailto:towertalk@contesting.com>
At 06:05 AM 10/23/03 -0700, Richard Karlquist wrote:

>     Where is the reference database and formulae available to
> calculate the
> lead inductance of copper strapping given the width and depth in
> inches and
> the length of the copper strap in feet?
> --
> Rutherford Resources
> Stephen Rutherford

It depends on how close it is to ground.

In practical circumstances, doesn't the shape of the strap -- that is, how many bends, and how sharp -- have as much or more effect? I'm assuming that we're talking about a lightning ground here, so that the rise-time of the pulses will be VHF-ish.



73, Pete N4ZR The World HF Contest Station Database was updated October 3. 2440 stations are listed -- 104 stations were added or updated. Are you current? www.pvrc.org/wcsd/wcsdsearch.htm



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