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Jimmie D wrote:
Cecil, I was thinking of trying your no= tune antenna and the 16 ft piece may not be doable at my QTH, I have to keep it all hidden behind the bushes. Could this piece be replaced with a circuit using lumped LC values. That would work at one frequency but not others. What I do with the 16 foot length is coil it into a spiral of 4 turns. The diameter of the spiral is about 16 inches and the overall length of the spiral is about 24 inches. That should fit "behind the bushes". I use a piece of fiberglass rod to which to tiewrap the coils. There's nothing magic about the 16 foot length. It is only necessary if you need to vary your length from 0 to 31 feet. In actual practice with my 130 foot dipole, I only needed to vary the length from 0 to 23 feet so I made the "16 ft" section just another 8 foot section. The 16 foot section was required from 3.5-3.6 MHz and I never use those frequencies. That's why I could get away with replacing the 16 ft section with another 8 ft section. -- 73, Cecil, w5dxp.com |
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