As far as what I need the circuit for, I'm building a tube amp. The power amp section is staying the same, but the preamp section is being changed out, and it needs 325V instead of the 260V provided. I don't know enough about RC and LC filters to redo the power supply like that, and I figured it's easier to use a filter cap on a clipped sine wave than a reduced sine wave.
What I have shown here is just an example to make things easier. Also, the 78024 should be 7824. I'm using the TO-216 package. It's all plastic with a mounting hole for a heat sink, so the sink will be at 0V.
I was either gonna go it this way, or use an NPN transistor, Collector as input, emitter as output, resistor going from C to B, and zener diodes from B/resistor to 0V. The only problem is I forget how to make the feedback amplifier and what values to use for it.
It would be so much easier if they made a regualtor from the 7800 series that goes for high voltage, but this was the closest I could come up with.
