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My inspired guess, (if anyone really gives a rip... :wink:) is that the differential currents in the lower ¼ should cancel, leaving the upper active part both well elevated above what one would get from a standard bottom-fed 5/8, plus, (and due to the cancellation of the lower ¼ wave currents) should be allowed to fully radiate as an unimpeded ½ - 5/8 wave, thus producing roughly the same gain as seen from the SGM, which is also an unimpeded full 5/8 wave unlike the active 3/8 left to do all the performing in a standard bottom-fed 5/8.


OK, now just TRY to disagree, ...I DARE YA! :D