[SFDXA] New 4 Element SteppIR

Fri, 28 Mar 2003 09:17:13 -0500

Nope, It's the real McCoy..

Gil, W1RG
----- Original Message -----
From: "William Shirley" <[email protected]>
To: "Bill Marx" <[email protected]>; "aSFDXA" <[email protected]>
Sent: Thursday, March 27, 2003 11:09 PM
Subject: Re: [SFDXA] New 4 Element SteppIR

> Are you sure this email didn't get out a few days early!!
>
> Looks like an April 1 email to me...
>
>
> ----- Original Message -----
> From: "Bill Marx" <[email protected]>
> To: "aSFDXA" <[email protected]>
> Sent: Thursday, March 27, 2003 6:23 AM
> Subject: [SFDXA] New 4 Element SteppIR
>
>
> > New 4 Element SteppIR (from TowerTalk List)
> > -Bill W2CQ
> >
> >
> > Since all of you have helped us out so much with your thoughts and
input,
> we
> > decided to give the SteppIR Yahoo Group some preliminary specifications
on
> > the new 4 element yagi, which will indeed be introduced in the May issue
> of
> > QST and CQ, as well as at Hamvention 2003:
> >
> > 4 elements, 32 foot boom, trussed with phillystran kevlar cable
(provided)
> >
> > 13.8 MHz to 54 MHz continuos coverage
> >
> > Gain: Ranges from 9.5 dBi on 20m to 10.8 dBi on 10 meters, varying with
> band
> > changes. (subtract 2.15 dB to get dBd)
> >
> > Front-to-back in what we consider our "optimal" configuration (best
> > combination of gain and F/B), is slightly better than the 3 element.
> > However, a 4 element antenna allows for some very high front to back
> ratios
> > if you are willing to sacrifice a bit of gain (0.5 - 0.7 dB).  Gain can
> also
> > be accentuated by about the same amount if front to back is ignored.  At
> > maximum gain, the match is still good but front to back can drop to as
low
> as
> > 10 dB on 20m.  We will know more about this after additional range
testing
> > and computer modeling.
> >
> > 180 degree mode:  4 elements in forward direction, wide spaced 3 element
> in
> > 180 degree direction
> >
> > Bi-Directional: pretty much the same performance the 3 element Yagi has.
> >
> > 6 meters: it will work similar to that of the 3 element without the
> passive
> > element adder, if you go with the passive element adder it will probably
> be
> > two passives, making an outstanding 6 element 6 meter yagi.  (price not
> yet
> > determined for adder)
> >
> > If you have the 3 element yagi, the element adder kit will be
> approximately
> > $500.00, which includes: boom, truss system, 4th element, software
> changes.
> > You will need another 4 conductor cable.
> >
> > Introductory price for the stand alone 4 element yagi: $1589.00
> >
> > Make no mistake about it, there is no multiband antenna that we know of
> that
> > will outperform this new Yagi, and someone will have to have a very big
> > mono-band antenna to top the performance of the new SteppIR 4 element
> yagi.
> >
> > As always, if there is an antenna manufacturer that believes otherwise,
we
> > will gladly participate in head to head competition with any comparable
> > antenna on the market.
> >
> > Thanks and 73s
> >
> > John Mertel / WA7IR / SteppIR Antenna Systems
> > _______________________________________________
> >
> >
> > _______________________________________________
> > SFDXA mailing list
> > [email protected]
> > http://mailman.qth.net/mailman/listinfo/sfdxa
>
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