It is trendy in these days to build a high voltage and low current regulated power supply for tube amplifer with solid devices. Actually we have many options at hand when choosing the main regulating device, an IC, a bipolar, a JFET or a MOS. Let's factor IC out. If you want to build such a regulated power supply, which active device you prefer to use as the main regulating device, Bipolar, JFET or MOS?
Any hint will be highly appreciated.
Any hint will be highly appreciated.