The process is very much like what happens to soils during an earthquake, but on a micro scale by comparison (thank goodness). -73- LB, W4RNL -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems: owner-towertalk@contesting.com Search: http://www.contesting.com/km9p/search.htm