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Re: [TowerTalk] W2DU Balun Bead Source

To: Cecil Moore <>
Subject: Re: [TowerTalk] W2DU Balun Bead Source
From: Tim Duffy K3LR <>
Date: Tue, 09 Jan 2007 21:46:32 -0600
List-post: <>
I have used the W2DU chokes and at 1500 watts they get way too warm. I suggest 
the W0IYH design. I use one at the output of
the amplifier and one at the feed point of every antenna. They work GREAT.

Comtek sells the W0IYH choke.

Tim K3LR

Cecil Moore wrote:

> >From: "R. David Eagle" <>
> >Subject: [TowerTalk] W2DU Balun Bead Source
> >Howdy all...I am looking at constructing 2 W2DU bead baluns as described in
> >ARRL Antenna book that uses 12 Amidon FB-77-1024 beads.
> Not trying to change your mind, but you get more balun for the money with
> multi-turn
> toroids. Multi-turn toroids yield a choking impedance proportional to the
> square of the
> number of turns. Turns are cheap. W2DU baluns yield a choking impedance
> proportional
> to the number of beads. Beads are expensive. I have the very W2DU chokes
> that you
> want to build and don't use them.
> --
> 73, Cecil,
> _________________________________________________________________
> Dave vs. Carl: The Insignificant Championship Series.  Who will win?
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