Bill - Look at Force-12's B1-5 balun. It is in a plastic box such as you
mentioned, 3" by 3", with mounting tabs. It has an SO-234 on one side, and
a pair of 14 GA. wires coming out of the opposite side. Inside, it is
RG-303 around a 2.4" O.D. torroid core of 61 material.
73, Ken
----- Original Message -----
From: "Bill Coleman" <aa4lr@arrl.net>
To: <towertalk@contesting.com>
Sent: Tuesday, August 07, 2001 11:56 AM
Subject: [TowerTalk] Voltage or Current Balun?
>
>
> I'm in the midst of erecting a tower for my quaint little A3S. In
> readying the A3S, I need to consider how to add a balun.
>
> Cushcraft recommends a coiled coax balun, which I know would work great,
> and I have used it before. But, for several reasons, I have decided to
> forgo the coiled coax balun.
>
> Some time ago, I purchased a bunch of ferrite beads that are large enough
> to slip over RG-213. I have 25 of these (totally 28 inches). I intended
> to use this as the balun for the A3S. Because of the sheer size and
> weight of this balun, I've decided to look at alternates.
>
> What I'd like to do is mount a balun in a small, plastic box near the
> feedpoint, and mount a standard SO-239 connector. This avoids the
> "splitting the coax" problem with this antenna. The question I have is --
> what kind of balun?
>
> I have a toroidial balun kit for a voltage-type balun that I could use.
> But I'm considering ordering a kit for a current-type balun.
>
> Power handling capability isn't really an issue here. I know some people
> have had trouble trying to run a full gallon into some current-type
> baluns. I don't own an amplifier. If I ever did, it would probably be in
> the 400-1000 watt range.
>
> Opinions? Are current-type baluns better for a wide-range antenna such as
> the A3S?
>
> Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr@arrl.net
> Quote: "Not within a thousand years will man ever fly!"
> -- Wilbur Wright, 1901
>
>
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>
> -----
> FAQ on WWW: http://www.contesting.com/FAQ/towertalk
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> Problems: owner-towertalk@contesting.com
>
>
List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems,
Trylon Titan towers, coax, hardline and more. Also check out our self
supporting towers up to 96 feet for under $1500!! http://www.anwireless.com
-----
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
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