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@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@contesting.com
Subject: Re: [TowerTalk] antenna choices
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Tue, 07 Apr 2015 13:41:49 -0700
On Tue,4/7/2015 1:25 PM, john@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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