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

[Jim Brown K9YC]

On Fri, 06 Aug 2010 17:20:42 -0500, Dr. Gerald N. Johnson wrote:

>For HF 
>choking they need an initial permeability of a few hundred to 1200 or 
>so. For a transformer that permeability for HF would be 50 or 125. Its 
>really hard to put multiple turns of RG-213 through any size of toroid.

Gerry,

You need to study the fundamentals of how ferrite chokes work. IT IS NOT 
ABOUT PERMEABILITY. IT IS ABOUT RESISTIVE IMPEDANCE. Your analysis is badly 
mistaken. You need to study my tutorial. 

73, Jim K9YC