Hello Guy,
It sound like you are saying that EZNEC's auto-seg feature should be
overridden in some cases. I am all ears, sir! :-)
The feature has *conservative* and *minimum recommended*, as you know. Are
there cases when even *conservative* is not good enough?
73, Mike
www.w0btu.com
On Fri, Jul 12, 2019, 8:17 AM Guy Olinger K2AV <k2av.guy@gmail.com> wrote:
> Hi Dave,
>
> What are you using for the vertical's counterpoise? What are you using for
> the the ground type? Where is your source placed?
>
> These are essential to answer your question.
>
> 73, Guy
>
> On Fri, Jul 12, 2019 at 8:02 AM David Gould <dave@g3ueg.co.uk> wrote:
>
> > Most of my modelling has been with wire antennas but now I am modelling
> > some verticals with elements having diameters of between 38mm and 25mm
> > for 20m and 40m (and using drooping elevated radials made of wire)
> >
> > I usually use around 9 or 11 segments for a 1/4 wave element. I noticed
> > that when I changed the number of segments the results for things like
> > feed impedance changed quite dramatically.
> >
> > Are there some guidelines for the number of segments for a 1/4 wave
> > straight wire element?
> >
> > How is the choice of segment length affected by the diameter of the
> > element tubing? Is there a limit on the ratio of segment length to
> > segment diameter?
> >
> > 73,
> >
> > Dave G3UEG
> >
>
>
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