I have done a bit of modeling and found that 20M wants to be spaced about 50 feet apart. This is too much for 10 and 15 so 30 feet looks to be a decent compromise. Mike W0MU > -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems: owner-towertalk@contesting.com