If you want a gain Yagi of wire, you make a dipole for fed element, and
another 5 per cent longer for reflector and one 5 per cent shorter as
director.
Spacing can be experimentally optimized from 0.125 wavelength starting
points.
A full wave and a quarter of horizontal wire will give you some nice gain,
even if it is only 20 feet high. Make it square for all directions
coverage, feed in corner with 450 ohm ladder line to a tuner for all bands.
Formula of 1005 over F in MHz is a starting point for full wave loop. Since
you are tuning it, exactness is not an issue. (Does not have to be resonant
when cut.)
GL, 73,
Stuart K5KVH
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