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I simulate what a Gain Master might look like modeled. The idea in this presentation was to suggest what happens on raising the antenna above the 1.25 wavelength commented on in the QRZ.com thread link noted above. I just used the Marconi x because W8JI brought up the idea of the Starduster and the 5/8 wave dipole (center fed 22.5' foot vertical radiator) just happend to be another antenna...that was close by in my index list of models.

 

The choice of this antenna was easy to modify and was just a coincidence, but one I thought everyone probably knew about.

 

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