[TowerTalk] antenna quiz?

[Keith Dutson]

What does the manufacturer recommend?  Would the 2:1 balun be for 100 ohms
rather than 25?

I would try to get feed point impedance to 50 ohms then use a standard 1:1
current balun or RF choke.  A hairpin coil usually is a good device to set
impedance for a Yagi.

73, Keith NM5G

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of 30KR239 Fernando
Sent: Monday, December 12, 2005 5:35 AM
To: towertalk
Subject: [TowerTalk] antenna quiz?

Hello,
I´m in the process of buying a new antenna, an Optibeam OB10-3W. I´ve been
told that this antenna presents an impedance of 25 Ohms at the feedpoint
that´s what I would need to use the 5 Kw (2:1) balun from Array Solutions.
My questions are....isn´t it a too low impedance?...would it affects the
antenna´s performance on any way?...Thanks in advance. 73s!
EC1CT Fernando
E-mail: ec1cwg at dxhunters.com
URE & ARRL member
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