Looks I've stacked quite the array of old power supplies here! Coincidentally, I've got the same high-voltage power supply Ben Krasnow used in his SEM build (3rd from the top.) I think all these should cover the various lower voltage supplies I'll be needing. I've got a power supply for the filament heater, the physical vapor deposition rig (that's going to be a separate project unto itself), the photomultiplier tube, and the Everhart-Thornley detector's grid. The 10 kV phosphor screen supply is still needed, but I've building that one. Next up is the 30kV acceleration supply...