12-26-2011, 09:24 PM
I use this calculator. Saves from doing the math yourself which isn't hard. But you'll find this calculator isn't exact. I always use it and error on the side of "too much". Makes it easy to trim back to fine tune for antenna.
http://www.angelfire.com/mb/amandx/loop.html
http://www.angelfire.com/mb/amandx/loop.html
-Brian
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