Sorry. I thought a plate choke was not operated at resonance, just as
an inductive impedance between the plate signal and the DC supply. I
agree that ferrite cores saturates with fewer ampere turns than
powdered iron ones do, but I think the cores I mentioned will
withstand about 10 ampere turns or so without saturating. And I think
their high frequency losses go down when DC biased.
Bill Turner wrote:
> Everything I've ever read on the subject says never use ferrite
cores in a resonant circuit. Powdered iron is the preferred material.
Ferrite saturates, powdered iron doesn't.
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