[TowerTalk] Pre-Installation Tuning of Cushcraft TEN-3 Yagi
n7mal at citlink.net
Fri Jul 4 16:53:44 EDT 2008
Follow the directions.....
BULLHEAD CITY, AZ
Everyone in the world is
entitled to be burdened
by my opinion
----- Original Message -----
To: towertalk at contesting.com
Sent: Friday, July 04, 2008 22:25
Subject: [TowerTalk] Pre-Installation Tuning of Cushcraft TEN-3 Yagi
I am in the process of checking SWR prior to installation of a TEN-3 Yagi (3
element Yagi for 10 meters). The Cushcraft documentation states that I
should temporarily mount the antenna with the boom vertical and reflector
atleast one foot off the ground on a non-metallic support.
I have it 6 ft. off the ground mounted on a fiberglass ladder (non
Using an MFJ-259 SWR Analyzer, I recorded the following data after adjusting
the match on the driven element:
My goal is to tune this antenna for a resonant frequency of 28.3MHz and I
have matched the dimensions provided by Cushcraft towards this aim. I have
tried extending the dimensions of the driven element by 2" but only moved
the resonant frequency down to 28.647MHz.
My question is whether I should trust the Cushcraft documentation and put
it up as they have described, assuming that the close proximity to the
ground is disturbing my measurement.
Thanks for any help / advice you can provide!
73 de KB5URQ
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