Anyone out there interested in high performance monoband Yagis???
I'll prime the pump by sharing the YO file for my 6 element 15M beam on a
48 foot boom. Of course, I have YO files for all of my Yagis, and if
there is sufficient interest, I'll post the YO files for my 40, 20 and
10M Yagis.
73
Frank
W3LPL
donovanf@sgate.com
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6 Element 15M Yagi 48 ft Boom
Height 2340.000
21.000 21.225 21.450 MHz
6 elements, inches
0.8750 0.7500
0.0000 72.0000 70.1822
50.5432 72.0000 60.2349
108.1917 72.0000 58.9181
235.5508 72.0000 55.5817
403.9829 72.0000 53.2540
570.0000 72.0000 46.1496
Use H key to set elevation angle to 3.5 degrees
T-match parameters:
Rod diameter 0.5"
Rod spacing 5"
Rod length 31"
Lead length 3"
Series Cap 99999 pf
Feed Z 200 ohms
Experience indicates that the driven element tip
must be lengthened to 67 inches, the length that
produces a modelled impedance of +j20 at 21.225 MHz
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