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jawod wrote:
Yep, too LONG. Egg on MY face. In my defense, it was late and I was working all day getting the G5RV up in the trees. The dipole should be 102 feet for bare wire. Maybe 99 feet for insulated wire. That's 1.5WL on 20m. The series section should be 1/2WL on 20m. With a VF = 0.9, that's a little over 31 feet. According to EZNEC, here are the optimum lengths for the series section: 3.8 MHz 30.5', 7.2 MHz 34.5', 10.125 MHz 20.7', 14.2 MHz 33', 18.14 MHz 12.5' or 37', 21.3 MHz 29.5', 24.95 MHz 30.5', 28.4 MHz 23.4' It's easy to see why 31' doesn't work well on 30m, 17m, and 10m. -- 73, Cecil http://www.w5dxp.com |
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