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Astroplane, what is it? 1/4, 1/2, 5/8 ??

Found this interesting read on the Astroplane done a few years back. So, really what was the Avanti AS? What about the the Siro TO. Is it the same principle of how the Avanti used the 9 ft mast below the basket as part of the antenna?
http://www.cb27.com/tecnica/astroplane
This just a start. With you guys help I hope to resurrect this old thread and hope it shows what I see here.

Mark here is an old video I did comparing my Gain Master vs. New Top One from Sirio.



73's and God Bless You,

Eddie - Marconi and Grampa on my CB radio.
 
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