You can buy this book at HRO (http://www.hamradio.com), as well as other places I'm sure! >The better and more accurate mast forces info is in Dave Leeson's, W6NL, >ex-W6QHS, book "Practical Design of Yagi Antennas" which I think is out of >print. > >Cheers, >Steve K7LXC >TOWER TECH Dino...k6rix at arrl.net