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Do It Yourself (DIY) paradise for tube and SET project builders.

RE: "...the source Z is truly awful..."

I would like to point out that "Z" is not what PSUD2 is modeling with the step response function.

When JLH points out that it is hard to obtain a source Z of under 400 Ohms with a conventional / traditional L-Critical choke input he is mistaken.

What JLH is really looking at is "R" or "DCR", resistance. He's looking at the voltage drop for a given current increase that lasts longer than one cycle.

That's very different than "Z" or impedance (AC resistance). And what we really need to know is impedance over the frequency bandwidth of interest. PSUD2 will not tell us that.

The impedance of a PS filter is largely a function of the last cap in the filter no matter what else you might read here on the AA.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"



Edits: 08/21/12

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  • RE: "...the source Z is truly awful..." - Tre' 21:31:34 08/21/12 (0)

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