Article 1017628 of alt.home.repair:
Path: news.misty.com!not-for-mail
From: nicksanspam@ece.villanova.edu
Newsgroups: alt.comp.hardware.pc-homebuilt,alt.home.repair,alt.engineering.electrical,alt.tv.tech.hdtv,sci.electronics.basics
Subject: Re: Surge / Ground / Lightning
Date: 7 May 2008 07:51:59 -0400
Organization: Villanova University
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w_tom  <w_tom1@usa.net> wrote:

>  What will provide sufficient earthing?

A large series air-core copper toroid (eg 1' diam x 2' long with
a 3" wire spacing) followed by a small spark gap to a poor ground.

Nick