[Antennas] How to calculate 50 ohm point?

[C.Whitaker]

de WB2CPN
IF the 1/2 wave is cut to 468, (subject to a slight tweek),
and hanging free of trees and/or structures, AND the
vertical 1/4 wave is low loss, (10 inches air spacing),
cut to half the value you used for the 1/2 wave, it will
come out close enough to the Z of the 1/4 wave section.
That could be about 400 to 600 Ohms.
I would but a 4:1 balun at the bottom of the 1/4 wave,
and use a tuner, which may or may not be needed.
Try it.
73  Clete
P.S.  I expect you will receive varying opinions on this.
+++++++++++++++++++++++++++++


On 5/18/2012 1:33 PM, Ray wrote:
> Does anyone know how to calculate the expected 50 ohm point near the
> shorted end of a 1/4 wave coaxial stub made of 66% VF cable.
>
> I will be end-feeding a 1/2 wave antenna.  The open (antenna) end of the
> stub will be lightly loaded and have a quite hi Z.
>
> Your attention is appreciated.
> Ray, W4BYG
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