Thanks, Bob, for the elaboration on my attempt to explain the Fall of Potential ground measurement method. I defer all futher attempts to your expertise! Steve Zettel KJ7CH Libby, MT USA -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems: owner-towertalk@contesting.com