This is a lovely piece of work Ingo. How much of it is the original Nytech I sold you? Anything at all?
Thats a relief. I couldn't actually see where 80V unreg (power to the output stage) joins the board.
Well done Ingo. Only one hiccup from all that development is remarkable.
I would be interested in what waveforms look like at 20kHz, say to see how output capacitor coupling performs. Also scope is nice, what is it - Rigol?