My 5-el Telrex 20M beam used a 4:1 transformer. I no longer have that
antenna but I do know that was what it used.
------------------ Wes Attaway (N5WA) ------------------
1138 Waters Edge Circle - Shreveport, LA 71106
318-797-4972 (office) - 318-393-3289 (cell)
Computer Consulting and Forensics
-------------- EnCase Certified Examiner ---------------
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of
walnutcreek@appstate.net
Sent: Saturday, July 19, 2008 11:28 AM
To: towertalk@contesting.com
Subject: [TowerTalk] Yagi Balun
I beg to differ...
I changed the baluns on my Telrex Monobanders, and a TB5EM to 1:1 Ferrite
Choke Baluns that I built and they are working great with a 1:1 SWR and a
max at band edge of 1.6:1 SWR. They're all down and in stroage right
now....moved.
Worked for me, just my experience.
73 from afar,
Cam WA4JKW
I do believe that the Telrex monoband yagis employed the use of a T match in
the driven element. The impedance of a T match is not 50 ohms but 400 to
600 ohms. You would probably need a 9:1 Balun. A 1:1 Balun will not work.
Bob W6TR
> Three 29 year old TELREX MONOBAND yagi's are off the towers and on the
> ground for maintenance and repairs. The factory made and installed coax
> baluns will be replaced. If the baluns are replaced with a ferrite-bead
> type 1:1 balun such as the Force-12 brand, will the antenna pattern or
> other factors be changed?
>
> Thanks.
>
> Bee K4JLD
> k4jld@juno.com
> __________________________________________________________
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