30-05-2017, 01:18 AM
800V FETs have an amplification factor of amps per volt or more. Valves do ma per volt. There needs to be some resistance on the way to the cathode pin of the base to allow some negative feedback.
I have been thinking about this for some time with a view to making a fully regulated variable power supply using FETs.
So far I have only got as far as obtaining a tube of compliments to the IRF840 to try out a FET version of a basic five transistor discrete regulator.
I have been thinking about this for some time with a view to making a fully regulated variable power supply using FETs.
So far I have only got as far as obtaining a tube of compliments to the IRF840 to try out a FET version of a basic five transistor discrete regulator.
