[Esteban]

Originally Posted by Qiaozhi

Have a look here ->
http://www.thevalvepage.com/valvetek...r/nuvistor.htm

There are some example circuits that might be useful.

Thanks very much, very interesting article! I found a power supply for + B, this uses a 4069, 2 transistors, 1 mosfet, 1 inductor and 3 zeners of 62 V.