While this thread has nothing but an oblique relation to towers it has been informative and most helpful to me. Thanks for all the input. I have learned a lot. The question now is how to implement what I have learned. :-) 73, Craig Clark, K1QX RADIOWARE AND RADIO BOOKSTORE PO BOX 209 RINDGE NH 03461 603 899 6957 WWW.RADIO-WARE.COM