[sdiy] High Voltage Opamps ?

[Michael Buchstaller]

Hello group,

a friend asked me to build him a computer controlled tube curve tracer. He
is one of these strange audiophiles who wants to konw every silly stuff about the
old tubes.

So, the conversion from the measured voltage levels via a voltage divider and feeding that
into an ADC seems to be no problem.

I will have to build a regulated DC heater, but with it´s low voltages (1...15V) that will be no problem
for any Opamp with a transistor follower in the regulated loop.

But, how will i create the high voltage levels ? Ordinary DAC´s output 0...2.5V or so, How do i convert that
to 0...600V ? Are there Opamps for high voltages that i could use, or can i use some clever trick to
work with low voltages on the controlling side ?
Any hints of leads to suitable application notes would be more than welcome.

Thank you all !


-Michael Buchstaller