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RE: Where does the current come from?

To illustrate what you said,

The reactance ratio (at 20Hz) of the choke and cap as shown (10Hy-30uf) is about 5:1.

If the cap was 300uf (as it should be) that ratio would be about 50:1 and the output Z of the PS would be largely a function of the last cap with the rest of the filter mostly out of the picture.

At 1kHz the ratio (with values as shown) is 11,855:1 and the output Z of the PS is (all but) entirely a function of the cap.


Tre'
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