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Re: [TowerTalk] Balun for 160 ?

To: "TowerTalk" <>
Subject: Re: [TowerTalk] Balun for 160 ?
From: "Jim Brown" <>
Date: Mon, 25 Feb 2008 16:06:46 -0800
List-post: <">>
On Mon, 25 Feb 2008 22:54:48 +0000, RICHARD SOLOMON wrote:

>What would you suggest I use to match 50 ohm coax to 450 ohm twinlead ?
>I'm thinking of putting up a 160 dipole.

Why twinlead?  A low dipole is pretty close to 50 ohm coax and a high one 
is pretty close to 75 ohm coax.  Then all you need is a good common mode 
choke at the feedpoint, and you'll have a relatively quite antenna and a 
good match for at least 60 kHz of the band. Any good antenna tuner will 
match it to the transmitter over the rest of the band. 

If you're feeling rich and MUST buy a choke balun, the DX Engineering 
chokes and baluns are excellent, and are worth the money (and nothing else 
is even close). But they're expensive (about $130), big, and far too heavy 
to hang at the feedpoint of a dipole. 

See  for simple instructions on 
how to build your own common mode choke (what some call a current balun) 
for about $30 that will be as good as the DXEs, and a LOT less weight.  


Jim Brown K9YC


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