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This sounds quite bizarre, I'm fairly sure I would have put some minimum and maximum limits on values to prevent "issues" so it's quite odd that negative values can go in. Could you please let me have

I had a sim would not resolve. "Timestamp has fallen..." On re-entering I realized I had entered C1 as "-0.5u"... negative! The font used on my installation makes this very hard to see. While a

Thank you Duncan and Paul for the guidance. I now downloaded the latest build 76 from the io Files folder. Regards Luis

Isn't that an old version? The current versions seem to be on groups.io under the 'Files' tab. /g/duncanampspsud/files/psud2_windows

There appear to be some issues with the server, I've just been on chat to support. The files stored at https://www.duncanamps.com/psud2/download.html were just legacy files anyway and are way out of

Thanks for the help so much. So the question I am unsure of is what makes a good transient response compared to another, I sort of felt like the speed (tightness of the curve) to return to the steady

Hello! I am getting this error when trying to download the official windows executable from http://duncanamps.com/psud2/psud2_setup.exe Anyone seen this one before? Thanks! **** Forbidden

You're doing the right thing by using the step change to model the transient behaviour. If ringing at the transition point is a problem, I've found it helpful to make the first C of a CLC section a

So I am considering updating some old capacitors in an existing power supply B+ on a driver valve 6c45 and B+ on an output valve 211 in a single ended power amplifier. The existing design uses CLCLC

Duncan PSUD and power transformer makers "assume" AC power is sinusoidal. (For several reasons, it always is, nearly.) And because the original load on AC power systems was light-bulbs and heaters

On PSUD2 you would enter the off-load RMS voltage of one leg, so for 800V CT that would be 400 (probably a bit more than that as PSUD expects the off-load voltage). It multiplies by 1.414

i downloaded Spice LT not too long ago, and i noticed i have to enter V * 1.414 to get my AC Voltage sources where they are supposed to be. i am designing to a 5U4GB on a 800ct secondary, and your

Hello Thanks to the help received from people (as an ex chemist I have some experience but zero training in electronics) I have been able to resolve a number of very basic MacBook-related PSUD2 issues

Thanks, Now I get it

On 6/6/2022 1:29 PM, Duncan Munro wrote: Like this (attached):

Hi Morten, Have you checked any of the boxes in the results area (like V(C1)) to enable the chart line? Regards, Duncan

Totally awesome. Great work Duncan! Brian in Seattle

Outstanding! Nice work, Duncan. JL

Hi I am trying to learn how to use the?PSUD2 for Mac. I have installed the build 77 and played around a bit, but I don't see any?graf. Previously I have tried?build 73, but with the same result.

very very nice, thank you so much for this great tool.