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Re: [TowerTalk] Type 31 baluns

To: "towertalk@contesting.com" <towertalk@contesting.com>
Subject: Re: [TowerTalk] Type 31 baluns
From: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 01 Jun 2010 10:55:33 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
On Tue, 1 Jun 2010 15:18:59 +0200, DF3KV wrote:

>Why should one bother for wire and core insulation if the balun will be used
>to feed a 50 ohms load?

To kill common mode current. See http://audiosystemsgroup.com/RFI-Ham.pdf

The word "balun" has been used to describe many very different things. 
Impedance transformation by series/parallel combinations of common mode 
chokes is only one of those things. I try not to use the word "balun." The 
thing being discussed here is a common mode choke. It is commonly called a 
current balun. 

73,

Jim Brown K9YC


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