> Hi Steve. I have the steppir, but I'm clueless about modelling
> antennas. Only one question. Did you do the 6 M model for 3 or 4
> elements.
>
Three elements, the standard configuration. I realize there's a
stationary 4th element available for the 6m configuration, but don't know
where they put it...will try to find out. -WB2WIK/6
> The optimum Steppir configuration is for 4 elements using the
> 180 degree setting. I'm told the stationary parasytic is better spaced
> in this configuration... Try it and let us know the results. (or maybe
> you already did?)
>
> Always willing to learn.
> Gil, W1RG
>
>
> Steve Katz wrote:
>
> >
> >
> >
> >>>The StepIR is an optimized 3L beam AT
> >>>ALL FREQUENCIES.
> >>>
> >>>
> >>That depends on how you define the word "optimized," eh? I don't call
> >>fixed
> >>element locations on the boom optimized on more than one band.
> >>
> >>Mark, N5OT
> >>
> >>
> >>
> > [Steve Katz] Mark, I have to agree. Unless this antenna defies all
> >the modeling programs, using a 16' boom and fixed element locations
> provided
> >in the SteppIR manual, and modeling using NEC, if I adjust the element
> >lengths in 1" increments indefinitely, to try every combination of
> element
> >lengths there is from 10" to 432" per element using (N+1...) algorithms,
> I
> >cannot come up with any combination that provides more than about 6dB F/B
> on
> >six meters, for example. The original claims for F/B on "all bands" is
> >"20-50 dB, depending on frequency" for the 3L model, but I can't use any
> >modeling integers that indicate that, at any element lengths or any
> height
> >above ground. If the inventor/manufacturer can provide us with some new
> >data on this matter, I'd love to receive it! Better still, I'd like to
> >know what the exact element lengths are to provide max F/B on each band,
> >based on the 16' boom length and fixed element spacing. Then I can scale
> it
> >1:10 and stick the model in our RF anechoic chamber here at the lab, and
> >take actual (empirical) data. I'll be happy to provide the test report
> in
> >this forum, if I can get the data to make the model. -WB2WIK/6
> >
> >
> >
> >
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> >>
> >_______________________________________________
> >Self Supporting Towers, Wireless Weather Stations, see web site:
> http://www.mscomputer.com
> >Call 888-333-9041 to place your order, mention you saw this ad and take
> an additional 5 percent off
> >any weather station price.
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> >
> >
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