Several weeks ago, I directed some members of this group to a very comprehensive article on grounding for good lightning protection only to discover that the article had temporarily been removed from the site. It's back and is excellent although I can't achieve it in full. Go to http://bratsatv.org. On the home page tab over about 8 times to "Technical." It's the first article. Hope this information is useful. 73 Bob Martin KC3FI EchoLink Node - 55127 Please visit http://www.wan-leatonks.net.