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yes, an analyzer will be needed ..but i had an idea... i could design it for any frequency and scale it up or down ...so if i had 2 telescopic antennae, you can buy pretty big ones or have some ally tubing with a lot of adjustment and set the length for 5/8 wave for whatever frequency, feed it in the center and then say shorten the bottom element and then lengthen the top element by the same increments that would keep it 5/8 wave but would move the feed point down taking readings as you go if i made this and put on my tower the AGL would be 55 feet but don't have the time at the moment my next antenna build is a vertical CFD for 17 meters which i have amassed the materials for it and for a center feed ally antenna there is no R&D

[QUOTE="davev8, post: 799784, member: 19379"] yes, an analyzer will be needed ..but i had an idea... i could design it for any frequency and scale it up or down ...so if i had 2 telescopic antennae, you can buy pretty big ones or have some ally tubing with a lot of adjustment and set the length for 5/8 wave for whatever frequency, feed it in the center and then say shorten the bottom element and then lengthen the top element by the same increments that would keep it 5/8 wave but would move the feed point down taking readings as you go if i made this and put on my tower the AGL would be 55 feet but don't have the time at the moment my next antenna build is a vertical CFD for 17 meters which i have amassed the materials for it and for a center feed ally antenna there is no R&D [/QUOTE]

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