I have only just recently found out here on DIYaudio that the PSU RC time constant is related to the global NFB and input time constants.
input RC << NFB RC<< PSU RC(filter caps *nominal load )
eg. input 100mS ( F-3db=1.6Hz), nfb 140mS, psu 200mS,
you can even spread them out to one octave spacing.
Gives you something to try.
I mean using a circuit simulator, such as Spice or whatever (there are free programs you can use: searching the forum should turn something up). For instance, the attached picture is what a test circuit might look like in the program I use. V1 and 2 represent the voltage out of the transformer, with R_t1 and 2 approximating the impedance of the transformer (you can work that out from Ohms law, the unloaded and fully loaded output voltage and rated current of the transformer).gengis said:Mr Evil,
How do you simulate the amount of capacitance needed?
The only test instrucment I have is a Digital Multimeter, Fluke 189. Measure the usual + capacitance, frequency.