[SFDXA] New 4 Element SteppIR

[William Shirley]

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" <bmarx@bellsouth.net>
To: "aSFDXA" <SFDXA@mailman.qth.net>
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
> _______________________________________________
>
>
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