TenTec
[Top] [All Lists]

Re: [TenTec] [Fwd: Line Isolator Balun (sorta) question.]

To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Subject: Re: [TenTec] [Fwd: Line Isolator Balun (sorta) question.]
From: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sun, 08 Aug 2010 10:05:30 -0700
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
On Sun, 08 Aug 2010 10:25:05 -0500, Dr. Gerald N. Johnson wrote:

>And the 
>distributors rate only on permeability, getting that resistive data 
>takes extra legwork, sometimes lots of extra work.

You should visit the Fair-Rite website. That is NOT true of them. The 
front of the catalog (15MB as a pdf) shows plots of u' and u'' vs 
frequency for every material. The rest of the catalog consists of data 
sheets for every product designed for suppression, there are plots of 
impedance magnitude vs frequency, and of series R and X vs frequency, for 
one turn, two turns, and three turns. 

>Most times I wish reactive isolation not to waste power in resistive 
>isolation.

That's another hole in your understanding of how things work. You would 
benefit from reading my tutorial on coaxial chokes. Dissipation can be 
made quite small if you make R large enough, and, as it turns out, it's 
easy (and inexpensive) to do that if you understand the materials. 

http://audiosystemsgroup.com/RFI-Ham.pdf  

It should be noted that understandings articulated in that tutorial are 
the result of years of research and study. Last winter, someone forwarded 
to me a D.O.D. report that came to virtually all of the same conclusions 
c.a. 1966, but not made public at the time. 

73, Jim Brown K9YC


_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec

<Prev in Thread] Current Thread [Next in Thread>