[TowerTalk] Yagi Balun

Wes Attaway (N5WA) wesattaway at bellsouth.net
Sat Jul 19 15:38:37 EDT 2008

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 at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of
walnutcreek at appstate.net
Sent: Saturday, July 19, 2008 11:28 AM
To: towertalk at 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
Worked for me, just my experience.
73 from afar, 

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 at juno.com
> __________________________________________________________


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