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In Reply to: RE: stop monkeying with psud2 hoooey, its never right posted by vinnie2 on January 04, 2017 at 03:02:42
PSUD has significant limitations when it comes to designing a supply for audiophile use. It's nice for quickly predicting ripple content and loaded/unloaded output voltage, but not much else. Many "old-school" designs perform well in those two areas, but will color the sound. If you want to design power supplies that really perform, you'll need to learn SPICE.
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Buy Chinese. Bury freedom.
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I get a headache just looking at that link! I can live with psud2, at least for now.
Edits: 01/04/17
I wasn't referring to the link, but to SPICE, which is a means of modelling circuitry using a computer in order to make theoretical measurements and performance predictions. SPICE was very expensive software not generally available to hobbyists until Linear Technology began to offer a version for free, named LTspice.
PSUD is almost certainly using some version of SPICE internally, but with a simpler and more limited user interface. Just as one example of its limitations, PSUD can't tell you the output impedance of a power supply over frequency. I consider this a critical characteristic, and I won't build a supply now without analyzing it in SPICE.
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Buy Chinese. Bury freedom.
I'll try to take a look at it, but I have a feeling most of it is going to be more complicated than I like to get.
Start with something simple. Stick a voltage source on the page and ground the bottom. Then wire two series resistors across it. Tell the software to RUN. When it's done, look at the voltage and current around the circuit. It's a small step from there to viewing RC time constants, LC filters, power supplies, tube amplifiers etc. Not for everyone, I know, but it's an extremely useful tool.
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Buy Chinese. Bury freedom.
I might be able to handle that.... : 0 ). Thanks for the info.
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