Home » Audio » Speaker » Why are air core coils?
Why are air core coils? [message #15683] Tue, 03 June 2008 11:07 Go to next message
cantur is currently offline  cantur
Messages: 2
Registered: May 2009
Esquire
Somebody told me air core is better than iron core coil. Is that true and if so, why?

Re: Why are air core coils? [message #15684 is a reply to message #15683] Thu, 05 June 2008 16:13 Go to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18695
Registered: January 2001
Illuminati (33rd Degree)

Iron core coils suffer from hysteresis and can be saturated, air core coils don't. As a result, an air core coil offers better performance in terms of linearity and therefore distortion. But for large inductance values, laminated steel cores are sometimes attractive because air core coils would need to be much larger, requiring many more turns of the conductive wire or foil.


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