[TowerTalk] [Bulk] Re: antenna choices

[Grant Saviers]

I'm wondering if there have been any attempts at more than 4 element 
SteppIR's?

I'm happy with my 4L but it would be nice to have some more smoke. What 
might be interesting are some longer boom more limited band 
combinations, with higher performance e.g.  6 L on 15/12/10 or 5 L on 
20/17 or 6 L on 17/12 on 42' boom (the one I want, since my modeling so 
far for an interlaced 5/5 design isn't succeeding).

Another advantage of limiting the band combinations is that there isn't 
as much compromise when stacking them.  Also, there would be less tower 
loading, fewer rotators, etc. than conventional 3 band contest stacks.  
However, there remains the tuning delay when QSYing or band changing, 
which is a bit of a problem in contest S&P & mult chasing.

Grant KZ1W


On 4/9/2015 14:07 PM, john at kk9a.com wrote:
> It was an interesting article by K6IF and W6BD although I am not sure why
> the gain figures in the chart do not match the text. The C-31XR and 4el
> SteppIR are two very different technologies and yet the end results
> (except for poor 10m SteppIR F/B) are very similar on the three bands
> tested. Using the gain figures in the text, these antennas have only
> slightly less gain than my homebrew 4el 20m OWA Yagi at the same height.
> Of course a larger monobander would beat them but that is not a fair
> comparison.
>
> John KK9A
>
>
> To:	towertalk at contesting.com
> Subject:	Re: [TowerTalk] antenna choices
> From:	Jim Brown <jim at audiosystemsgroup.com>
> Reply-to:	jim at audiosystemsgroup.com
> Date:	Tue, 07 Apr 2015 13:41:49 -0700
>
> On Tue,4/7/2015 1:25 PM, john at kk9a.com wrote:
> That is very interesting data!  Has anyone modeled a SteppIR with a
> comparable boom length?
>
> Google found these. When I was making my purchase decision, I saw other
> work that looked like it was well done.
>
> http://p02.de/wp-content/uploads/2010/12/steppIR_Ms_ENGL_REV16DEC10.pdf
>
> http://www.k6sgh.com/antennas/steppir%20study.htm
>
> http://www.k6if.com/steppir/steppir_4el.html
>
> 73, Jim K9YC
>
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