Let's not forget that the SteppIR IS only a 3 element antenna. Fact is, ALL
3 el., multi-band, YAGI antennas must be a compromise.
Brad - N8SNM
----- Original Message -----
From: <n4kg@juno.com>
To: <TOWERTALK@contesting.com>
Sent: Saturday, September 14, 2002 11:01 PM
Subject: Re: [Towertalk] Re: SteppIR Element Placement
> Your statement that the SteppIR antenna
> is a "no compromise" antenna ignores the
> fact that the ELECTRICAL spacing is
> DIFFERENT for EACH BAND. How can
> that be OPTIMUM? THAT is the compromise
> in the SteppIR design.
>
> Tom N4KG
>
> On Sat, 14 Sep 2002 ROBKEL@aol.com writes:
> > In a message dated 09/14/2002 11:06:31 AM Central Daylight Time,
> > towertalk-request@contesting.com writes:
> >
> > > Question for a SteppIR owner: where exactly is
> > > the DE placed on the boom?
> >
> > I own one. It is not yet up, but the latest instruction book says:
> >
> > Director - Driven = 89.5 "
> > Driven - Reflector = 102.5"
> >
> > I think the SteppIR is a BIG step in the right direction. As far as
> > tuning
> > goes, it is a no commpromise design. You can have a resonant antenna
> > on any
> > band with good to excellent directivity and gain, with a modest
> > weight and
> > windload, and minimum fuss puttting it up. This speaks volumes to
> > all of us
> > with small portions of real estate.
> > The small improvement in F/B for a variable boom length would seem
> > not
> > worthwhile to me. For the purist, I would opt for using a second
> > SteppIR,
> > above the first, and use a different boom length. No interaction
> > problem
> > (IMO) since you could set the unused one to 6m or higher.
> > I do plan to investigate using a 2nd 2EL unit with center loading
> > coils on
> > 40M. It should be tunable over the full band with the proper choice
> > of coil.
> > I have yet to model it (too many Honey do's).
> > A variable boom length would be a real mechanical challenge compared
> > to the
> > relative simplicity of the element tuning. (That said, the concept
> > of two
> > rack & pinions, stacked and constrained in some manner......or maybe
> > two
> > garage door tracks.....who knows???)
> > Bob, W5LT
> > _______________________________________________
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> >
>
>
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additional 5 percent off
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