On 10/19/21 3:48 PM, W0LEV wrote:
What could be higher Q (lowest possible losses) than air or vacuum?
Ferrite and powdered iron toroidal cores have a higher ?r which yields
higher inductance per turn than free space, but there are associated
losses. Air core inductors are the highest Q attainable, all other
variables being equal. Anything wound on ferrite or powdered iron cores
will exhibit lower Q than wound in free space.
Dave - W?LEV
Oddly, not necessarily.? Yes, the same windings, with a core, will have higher L and lower Q, because of core losses. However, if you compare equal inductance and current handling ability, you might wind up with a LOT of turns (and a very long wire) so the wire losses are higher than the core losses on a inductor on a core.
