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Glad I found this forum. I'm looking to build my own variable linear DC power supply, and I don't know anyone else who I can bounce ideas off of, but this thread seemed to be the latest and closest to what I want to do. My apologies if the schematic seems haphazard - first time using it.
120V AC line supplies a Staco 0-180V variac, then rectified to provide DC. R1 allows slow initial charging of the capacitor banks, while F2-F4 keep the banks semi-isolated should one cap short out. Looking to get 120 VDC output at 10-12 amps. Ripple isn't a huge deal because I intend to do some inductor switching with it.
Caps are Sprague Powerlytic, 1100µF @ 250VDC. Will probably end up putting Plexiglas between the terminals to prevent arcing. Also will probably incorporate a contactor into the output terminals so shutting down the power supply isolates the capacitor bank from the output.
Installed in a nice Hoffman enclosure I picked up for a song. Since I have very little power supply building experience, I could really use some insight and opinions. Thanks in advance!