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Since my power transformer fried*,
I've had some time to think about how I want the power supply to work. This is what I came up with.
*probably because it was unfused. the primary melted, but everything on the secondaries is still fine?
anyway the ripple at the outputs is too small for the simulator scope, but my guess is that it's about 100nvac at each load.
My wiring is probably noisier than that.
I still might remove the large inductor. I could get away with it by inserting another small(ish) low pass filter on the gate to the mosfet.
it would probably work even better, but i already have this big honking coil... idk
It's a bit overbuilt because I decided to add a regulator circuit to my already built filter section.
Anyway, there is 670VAC between the plates of the full wave rectifier, a 12x4 tube, and then a stack of 5% zener diodes to provide a reference voltage of up to 380V. The output of the rectifier will never get that high, so the regulator mostly smoothes things out at whatever the rectifier tops out at.
I don't need all the large caps in the filter section, but it's already built and paid for.