[Antennaware] Small Tribander or SteppIR 2-element?

[John Geiger]

The SteppIR would give you 3 more bands (6m, 12m, and 17m) over the tribander

73s John AA5JG

--- On Wed, 9/23/09, DAVID CUTHBERT <telegrapher9 at gmail.com> wrote:

> From: DAVID CUTHBERT <telegrapher9 at gmail.com>
> Subject: Re: [Antennaware] Small Tribander or SteppIR 2-element?
> To: RLVZ at aol.com
> Cc: antennaware at contesting.com
> Date: Wednesday, September 23, 2009, 7:59 AM
> 6' spacing for a 14 MHz 2-ele
> Yagi-Uda is short and I think the forward gain
> is 4 dBd. I can run a NEC simulation if you'd like. The TH3
> should be about
> 1 dB better on this band. I don't think there is enough
> difference to worry
> about and I would go with the tribander for reliability and
> price.
> 
>    Dave WX7G
> 
> On Tue, Sep 22, 2009 at 1:31 PM, <RLVZ at aol.com>
> wrote:
> 
> > Hi Guys,
> >
> > I had great results with a SteppIR 3-element up 60'
> when  the antenna
> > worked as designed.  Unfortunately, the
> Controller was bad  upon arrival,
> > and
> > then an 80mph windstorm blew two fibreglass elements
> off the  antenna which
> > then allowed water into a Stepper motor and it
> went  bad!
> >
> > Perhaps I'm a glutton for punishment but I'm
> seriously  considering a
> > 2-element SteppIR at a temporary QTH in the Midwest as
> the  3-element
> > SteppIR
> > turning radius may not clear the trees. 
> Question: isn't  the short 6' boom
> > on
> > the 2-element SteppIR too short for good  results
> on 20-meters?  I am not
> > familiar with using  modeling programs and don't
> have the time to learn so
> > I'd
> > appreciate your  thoughts on this.
> >
> > A 3-element tribander will work at this temporary site
> as it  has about the
> > same turning radius as a 2-element SteppIR... and a
> Tribander  like the
> > Hy-Gains TH3 might perform as well or even better
> better on 20-m.  (on the
> > portion of the band that it is tuned for) as it has
> a  little longer
> > spacing
> > between driven element and the reflector. 
> Of  course the Tribander would
> > be
> > alot cheaper too.
> >
> > What's your thoughts on the efficiency of a 6' boom
> length for  a 2-element
> > 20-m. yagi?
> >
> > Thanks for your thoughts!
> >
> > 73,
> > Dick- K9OM
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