[600MRG] Rudy's book...and other info.

Edward R Cole kl7uw at acsalaska.net
Fri Jan 26 13:52:26 EST 2018


Horizontal wire of inverted-L is a capacity hat as radiation is from 
the vertical wire.

73, Ed

At 08:34 AM 1/26/2018, Kenneth G. Gordon wrote:
>On 25 Jan 2018 at 23:55, lstoskopf at cox.net lstoskopf at cox.net wrote:
>
> >  I'm going to show ignorance here.
>
>Ha ha! Join the club! This is why we have such forums. :-)
>
> >  I would think that a capacity hat would be something like a
> > disc or a Yagi at the top of a vertical pole.
>
>Not always. Many here are using "capacity hats" which are simply 
>wires, even one wire in
>some cases, running horizontally from the top of their verticals.
>
>Rudy has an entire chapter which explains the WHY and the HOW of 
>capacity hats and why
>they are extremely useful at MF.
>
> >  A 132 ft sloper would be an antenna with some
> > impedance at the loaded end resulting from the geometry of the antenna.
>
>Well, that is what I thought too, but it doesn't show up that way in 
>the model.
>
> >   I would think that
> > EZNEC should give you some idea of that impedance.  How were the 
> results weird?  Thanks,
> > N0UU
>
>Well, for one thing, I am not using EZNec: I'm using MMANA-GAL, so 
>the results may be
>different, although up to now, they have been pretty much identical.
>
>I suspect that my model is not correct.
>
>As I have time, I'll redo it.
>
>Ken W7EKB
>
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73, Ed - KL7UW
   http://www.kl7uw.com
Dubus-NA Business mail:
   dubususa at gmail.com 



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