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In Reply to: RE: Can someone please do a check run on psud2 for me? posted by vinnie2 on January 03, 2017 at 15:37:58
and do it the
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WOW !!! Imagine !! A graduate EE adding a 200 Ohm resistor in series as the filter to the Finals, and then, using an additional 108 Ohms of DC resistance to the two chokes !! 308 Ohms of UGLY series resistances.And look, a 'C" input filter !! Oh well.
I liked the graphs and such, but the UNconcious EE author's suggested design will work and sound like doggie - doo.
Jeff Medwin ...... a Business Major...... Penn State.... 1966
Edits: 01/12/17
You go right ahead on it sport, that's not for me. psdu2 has always worked fine for me until I switched to windows 10. It is not yet set up for that apparently. Good thing I did not sell my windows 98 laptop.
Edits: 01/04/17
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.
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.
Almost everything you need in one place! That plus a copy of LTspice will get it done.
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Buy Chinese. Bury freedom.
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