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You'll probably get some more descriptive answers from the hardcore Mac users, however I can tell you it's a 64 bit app so will work only on the later 64 bit systems. I know that users have had

I downloaded version 77. Haven't installed it yet. What OS versions does this work with? Thanks

If you are using RC filters, you can burn off as many volts as you like in the resistors, so long as all components can stand the off-load voltage. It's much easier to lose volts than add them.

Hi Is designed a PSU with 290v-0v-290v transformer (Imax = *100mA* , *58VA* , Rpri=21ohms, Rsec=238ohms) and a *57mA total load.* I want to have arround 350Vdc at my B+ (with silicone diode

Thanks, I think I get it now, although I believe it is usual to include the winding resistance in the total limiting resistance, rather than adding it, when using capacitor input. Your plan to

There's a little bit more to it. The transformer impedance is, for the most part, caused by the primary winding resistance and the secondary winding resistance - both will affect the impedance feeding

Thanks very much for the reply. Just to be clear, if I need 100R in each leg, I just enter the secondary winding resistance as100R and this value will be applied to each leg when calculating?

PSUD shows the source impedance (combination of primary and secondary impedance) for just one leg of the winding. You can directly add the series resistance to this value to simulate the current

Tube rectifiers often specify the minimum resistance required in series with each rectifier to limit peak current. For full-wave rectification, does the source resistance shown in PSUD refer to the

JUST after I saw your reply, I was on The Register.com ' Oops~ column, and saw this comment: "Bug reports are a Good Thing for software that people find useful: it's a sign that people are using it

The checking is done when you try and exit the box containing the value. For example, if you key in -1u then nothing happens until you try and move. Pressing tab or clicking on the OK button will

'When' is the check? I am not sure I can do this on initial setup. I seem to do it at-will by editing an existing setup. Transformer voltage dialog objects to <2V at first setup, but if I enter 2V

Hi Paul, Thanks for sending the screen dump and other info. I've had a look in the file you sent, and the value in there is definitely -1E-6 (-1uF). However, I cannot offer any kind of explanation as

Screen capture showing values and plot, .psu file, About screen, Windows properties screen.

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