Finding 'mu' for magnetics

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Matthew Smith <matt-at-kbc-dot-net.au> 

Hi All

For those of us who are saving the planet by using re-cycled materials for 
our coils and apparatus, I have been wondering how we can determine the 
factor 'mu'
for ferrites and other materials that go into gate drive transformers, 
flyback transformers, etc.

My proposed method:

1) Wind a coil on the core, measure the inductance.
2) Take coil of core, measure inductance again.
3) Calculate mu from ratio.

Sounds too simple - but is it?

Cheers

M

-- 
Matthew Smith
Kadina Business Consultancy
South Australia
http://www.kbc-dot-net.au