I have put up a 80 wire vertical in some trees seeing I do not have a tower. I cut it 62ft6in so it should be on 3.750 however it seems long and the swr is 1:1 at 3550 or so. I have 10 radials and my longer version worked just fine. Any feedbck would be helpful. John J. Nistico 911 Electric Inc. 516.356.6071