I finally took some time to test the PSU today. The AC ripple is 0.0mV on the 12v lines, and 0,1mV on the 9v and 5v lines, tested with an ABB M2005 multimeter. I think that's pretty good. I have no reference on how a C64 brick with optimized circuit performs and do not have a functioning specimen lying around, so if someone would be so kind to take some readings, that would be nice for comparing. Cheers, Alex. [edit] Put most info in my user WIKI: http://www.midibox.org/dokuwiki/northernlightx IF this is found to be of use as a general MidiBox PSU it'll find it's way to the proper WIKI section(s).