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

[Jim Brown K9YC]

On Fri, 06 Aug 2010 12:43:30 -0500, Dr. Gerald N. Johnson wrote:

>That depends a great deal on the ferrite mix. There are beads suitable 
>for HF 

The only beads I know of that are suitable for HF are the tiny beads that 
W2DU found 30 years ago for his chokes. They only fit miniature coax, and 
it takes HUNDREDS of them to make a choke that still doesn't work as well 
as the multi-turn I've described. Those made with fewer beads are less 
effective AND they can be blown up with high power. 

73, Jim Brown K9YC