I would think about a Steppir 3 element Yagi with the 30/40 dipole, it
performs as good or better than other four element beams on 20, 15, 10
meters. The Steppir performs much better on 17 and 12 meters than other
manufactures that claim their antenna will "tune" on 17 and 12 meters. The
antenna that works as well as the Steppir on all bands including 17 and 12
meters is the Optibeam, but it is big and heavy.
You will be a long way under the square footage of your tower with the
Steppir and as I say it will work as good as and better in most cases than
other four element TriBanders. You will also have under a 1.5:1 SWR across
all the bands except for 30m negating the use of a tuner.
If I remember the Mosley did not do well in the K7LXC tri-bander report.
Mike, K6BR
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Chet
If I were you I would purchase the K7LXC tribander report. That is the most
comprehensive report out there. At the time the report was written there was
no stepIR was not available for testing. The stepIR is pretty heavy,
especially in the 4 EL version. Read the report (about 20 BUX) I have it
here and since I was not restricted by size of tower, I picked the F-12
C31XR which I could not be more pleased with. I do have a C4 which would
probably be very good for you. NO TRAPS and is noted in the tribander
report as a good performer, and if I remember correctly, beat the TH6- TH7.
Shorter boom, and lighter weight. The F12 literature says it loads on 12
and 17 meters with a tuner. I didn't find my C4 to be particularly
effective on 12 and 17 and later purchased the F12 WARC -7 which do work
well. If you can get the stepper up, that does go on 20-10 including the
warc bands. You will find the tribander report has comprehensive
information on most tribanders available today (less stepIR) with all tests
done at the same height and on the same antenna range.
73
Chet N4FX
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Fredric Serota
Sent: Thursday, January 21, 2010 2:00 PM
To: towertalk@contesting.com
Subject: [TowerTalk] Recommendations for 5 band yagi and tower upgrade
Just received approval from our zoning board to increase tower height from
40 to 65 ft according to new statute in Pennsylvania. We plan to replace our
433HD with a TX455, which I am told will swap out using the same base.
However it is rated at 18 square feet and current yagi (Mosley Pro96) is 24
square feet so I am looking for a lighter antenna. Prefer 4 elements on 20
and above and 3 elements on 40.
What do you suggest?
Any experience upgrading these towers in this way?
Fred Serota, K3BHX
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