There is a cool group on Facebook called "Electronics Theory and Circuit Design". People have interesting ideas, the group has good spirit and culture.
But I had this not-so-nice discussion with a new member called Doug Hale. He proudly presented XY scope photos with a circles on a rectangular ras...
Today I need a ± 100V symmetric power supply for a few mA of current consumption. I have this power supply from my broken audio amplifier, which can deliver ± 40V or ± 50V DC peak, depending on the 4/8 Ω switch for the transformator taps. Can I double the voltage somehow?