I'm building a high voltage power supply for a tube amplifier preamp and I need some advice.
I need a power supply with a shunt regulator that is rock solid stable and dead quiet and outputs 600v with a maximum of 100ma current draw that will be adjustable down to 2ma. The next stage of the design requires a stable voltage and the stage will amplify any noise so I need a good design.
I don't trust the stability or noise of that series regulator design. After building it in real life it seems to droop a few volts and I'm not sure what to think about the noise.
The resistor in the RC filter is underlined with question marks because I don't know the shunt design or overhead voltage that I will need for it.
Does anyone have any advice on a quality shunt regulator with as low noise as possible?