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Iron-core versus air-core woofer inductor intermod test (Continued).


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1 hour ago, Edgar said:

 

Not a Faraday cage. Mu-metal.

 

I learned about that stuff from the best audio transformer company in the world (they were bought-out, things may have changed); Jensen Transformer.

 

I noticed Amazon offered sheets of it. Expensive. And I was able to use orientation and location to get the crosstalk way under what I felt was needed without that stuff. I was also concerned that the super high permeability metal would modify air-core inductor behavior (they are the problem) - not just inductance, but effectively convert the air-core into a cored inductor.

 

So no dice. All turned out very well without that kind of thing. : )

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1 hour ago, Langston said:

 

I was also concerned that the super high permeability metal would modify air-core inductor behavior (they are the problem) - not just inductance, but effectively convert the air-core into a cored inductor.

 

 

I doubt it. The mu-metal would be outside the core of the inductor, not inside it. Any field outside the core is considered stray. https://web.ua.es/docivis/magnet/solenoid.html#

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