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#4
October 7th 06, 10:15 PM
posted to rec.radio.amateur.antenna
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Homebrew SteppIR Moxon
Dale Parfitt wrote:
"jawod" wrote in message ... I came up with an idea that, to me at least, seemed interesting. Imagine a Moxon design, a sort of "double D" "[]" arrangement. Imagine this arrangement encased in a PVC square or rectangle. Now, picture standard copperwire making up the elements and attached to each distal end is fishing line leading across the [] to the other side. This is true for both elements. Now, imagine a take up spool and motor such that the length of each element can be adjusted in SteppIR-like fashion. With the proper electronics, it seems you have a Moxon with adjustable resonance...a sort of homebrew SteppIR. I would imagine that the useable bandwidth would not be as great and at the appropriate length, the Moxon becomes a two element Yagi. Any comments? From the "big guns"? "Duff-Man"? Anyone? Thanks! John AB8O The most critical elements of the Moxon are the tail lengths and gap spacing- change that and you lose the F/B and the natural 50 Ohm feed. Dale W4OP Thanks for the replies. Back to the imaginary drawing board. |
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