<http://www.classiccmp.org/mailman/listinfo/cctalk> > <http://www.classiccmp.org/mailman/listinfo/cctalk> > Try closer to 8V RMS rectified that will be more depending on load. Same to the other two. Look up the calulations and see. FYI you also talking for the 8V line 60,000 to 150,000microfarads (at 15-25V) and the other two more like 10,000 to 20,000 (at 30V min) microfarad capacitors.. [snip] -----REPLY----- Hi Allison and the others that replied. Thanks for the information! I am currently using a kludged S-100 power supply built from repurposed SMPSUs. It works fine but involves three separate parts. I suppose if I could find a +/-15V dual output unit I could combine two but what I have works fine. However, I've never seen an off the shelf single unit SMPSU that supports S-100 voltages that does not require adjustment. A +7.5V/+15V/-15V or similar would be ideal but I've never seen one available. Reusing SMPSUs works but each solution is essentially a custom installation. Tweaking surplus ATX supplies sounds appealing but for most people screwing around with SMPSUs is hazardous and unique to each type of power supply. Generally, I stay out of the SMPSU chassis unless there is a really good reason to be there. I wrote up my plan for the S-100 linear power supply. It got rather long so instead of posting a mini-manifesto on the list if you are interested you can read it here: http://n8vem-sbc.pbworks.com/f/S-100_linear_power_supply_plan.html Any comments, suggestions, questions are appreciated. Thanks in advance and have a nice day! Andrew Lynch