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Inductance of toroid and other characteristics

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neazoi

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Hi, using this calculator http://qrp.gr/jlab/calculators/permeability_calc.htm it seems that the desired inductance can be accomplished usind different cores with differend permeability materials, bu altering the number of turns.
However, on RF, Q is also considered and some companies like Amidon provide different materials for differend frequency ranges.
Why is that? Is it only because of the Q or are there other factors as well?
 

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