There are other methods to reduce losses
and get the 'Q' in a coil up - the use
of toroidal cores comes to mind since
using a core with a permeability much
greater than the "1" that air has will
naturally reduce the number of turns
required for a given coil inductance.

Then depending on frequency, physical core
size and current level the matter of
'magnetic core saturation' becomes a
concern ...


RF Jim

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