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To: <>, <>
Subject: Re: [TowerTalk] GROUND SYSTEMS
From: "Gary Schafer" <>
Date: Tue, 20 Jul 2010 21:48:14 -0500
List-post: <">>

> -----Original Message-----
> From: [mailto:towertalk-
>] On Behalf Of
> Sent: Tuesday, July 20, 2010 9:20 PM
> To:
> Subject: Re: [TowerTalk] GROUND SYSTEMS
> In a message dated 7/21/2010 1:54:36 AM Greenwich Standard Time,
> writes:
> Why  bother flattening it? It has the same surface area when it is  left
> round.
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> I was told that lightning prefers a flat surface to travel  on.  Not being
> an expert I listened.  Am I wrong?
> Bill KH7XS

Hi Bill,

Lightning doesn't really care what shape the conductor is as long as it has
a low impedance. Round works just as well as flat for a given amount of
surface area.

The reason that copper strap is usually used rather than a round conductor
is that strap is cheaper than round for the amount of surface area used.
With a round conductor, wire or tube, only the outer surface is used due to
skin effect. With strap both sides are used.

Gary  K4FMX


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