Just a note, I don't want to get in an argument, especially since in the
case of antenna design I'd be an unarmed participant.
The entire SteppIR series of antennas has been extensively tested on an
antenna range. I believe at a place called Moses Lake.
I've had my 3 el up for 2 1/2 years without incident, and I'm most pleased
with its performance. And the support from FluidMotion, if needed, is
outstanding.
I'm a happy camper.
73 all,
Gil, W1RG
----- Original Message -----
From: "K4SB" <k4sb@bellsouth.net>
To: <towertalk@contesting.com>
Sent: Wednesday, March 16, 2005 11:59 AM
Subject: Re: [TowerTalk] Help in planning a new QTH
> Michael Tope wrote:
>> Steve,
> snipped....
>> to do for a fixed element length yagi. It could very well be that
>> a SteppIR can eek out an extra .5dB of forward gain when
>> you get rid of the bandwidth constraints.
>> 73 de Mike, W4EF................................
>
> I would tend to agree more with Steve and Dave on this matter. There
> is simply no way in the world ( short of an advanced antenna range )
> to determine how an individual element in the SteppIR might be changed
> to get additional gain.
>
> As an example, the element length and spacing on my 5 element
> monobander on 20 * and its twin on 15 ) is so critical I had to use
> millimetres for the tips and element spacing. As it stands right now,
> the antenna models at 50 +/- j0, and shows 15.93 dbi of gain with 55.6
> db F/B. All this modelling was done with EZNEC. (DOS and Windows
> versions) I can vary the spacing of the 3rd director ( or length ) and
> that pattern goes to hell in a hand basket.
>
> Admittedly, 55.6 db F/B is excessive, but I have always gone with the
> theory that you
> shoot the "juice" in the desired direction at all costs.
>
> As an after thought, I firmly believe that antenna height is the
> overall controlling factor. As some of the guys have pointed out, my
> TH-11 at 55' will whip the snot out of that big 20 under 5000 miles.
>
> Very interesting thread.
>
> 73
> Ed
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
> any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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