>"As I understand it, radiation resistance is mostly a function of the length
>of the vertical element."
That's right. Radiation resistance closely follows vertical length although
the base resistance component changes with vertical length and T-top size.
>"BTW --to increase SWR bandwidth, I'm using two wires spaced about a foot for
>the vertical part of the antenna, connected at both top and bottom."
I took the lazy approach and purchased a bag of LadderSnaps from 73CNC.com.
These are normally used to make 600-ohm open feeders. By shorting the wire
pair at the top and bottom, it "fattens" the conductor to about six inches.
Paul, W9AC
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