Has anyone ever added a stub to a 2 element quad relector that was adjusted
to best F/B with a relay across it that tuned it for maximum gain? Or
installing a variable capacitor with the tuning shaft extended to the boom
and a selsyn motor to tune it for gain for F/B? I was planning to try both
of these on a 5 band 2 element quad.
I had a 5 band 2 element quad, same spacing, with the DE's tied together
and it destroys the patterns and a great antenna. I put in the computer a 5
band 2 element quad with tpered spacing and individuatlly driven DE's and the
patterns were better than a mono 2 element quad. That's not true with
multi-band yagi's. Then I came up with a way to improve it even more. I've
got a mono 2 element quad with a yagi director in the computer that gives a
90 db null in the rear. Awesome! That's the largest I've ever obtained.
K7GCO
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