Daniel
Choke balun at each Feeded LOOP is needed, ferrite over the coax like k9yc
recommend, what you will need is the real impedance of each band,
in my case my quad only need a transformer in 12m (is near 100 ohms), the
others bands runs direct to 50 ohms with swr low , only 17m is 1.5 :1
minimum has is now.
Check your antenna model and you will see if you need a 1:2 balun Gamma or 75
ohms 1/4w line
here a few ideas of a good model, get access and read
http://www.cebik.com/content/a10/quad/quad4.html
J. Hector Garcia XE2K / WT6J
Mexicali B.C DM22fp
P.O.Box 73
El Centro CA 92244-0073
USA
http://www.xe2k.net
http://www.dxxe.org
--- On Mon, 2/1/10, Daniel Hileman <n9wx@hotmail.com> wrote:
From: Daniel Hileman <n9wx@hotmail.com>
Subject: [TowerTalk] 2 Element Quad and Baluns
To: "TOWER TALK" <towertalk@contesting.com>
Date: Monday, February 1, 2010, 6:49 PM
Hi Everyone,
Well, I appreciate the responses from everyone about Fiberglass spreaders. well
I found that Max-gain isnt as expensive as I originally thought, so I'm gonna
probably go with them. I now have a new question. I am trying to build a two
element 5 band (20-10m) quad, it will be on about a 10' boom. I have read some
places that say you do not need a balun, and others that say you will need a
2:1 balun if you want to connect all the coaxes to one feed (or a relay.) Can
you just feed these antennas to one SO-239 without a Balun?
Thanks and 73,
Daniel N9WX
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