[Amps] Plate choke and bypassing

[KD7QAE]

An ungapped ferrite toroid will not support DC current without 
saturating.  Powdered Iron has a distributed gap and will support DC 
current.

Tomm

John Popelish wrote:

>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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