Topband: Effect of DC on Ferrite Toroids?

[Charles Bibb]

At 10:41 PM 1/8/2007, you wrote:
>I recall reading somewhere that putting DC current through wire turns on 
>ferrite toroids
>could result in damage to the material.


Jeff,

Some ferrite materials are design to change permeability with DC bias, 
sometimes by as much as a factor of ten.  I'm not sure if all mixes will do 
this or only those specifically designed to do so.

I've been trying to come up with a useful application of this property for 
Beverage matching, etc., but so far I can't think of how it could be used 
to advantage.

73,

Charles - K5ZK