Yoda wrote: ↑Fri Oct 20, 2023 9:11 pm
So I took a Pro Junior and rebuilt it using Rob Robinette’s AB763 Blackvibe and upon start up I’m not getting any negative bias voltage. I am using the stock transformers of the Pro Junior there is no PT center tap.
But you can do bias + balance or dual bias with a capacitor coupled bias supply. This thread has shown that there are many ways to do this, and it's more complicated than most people realize!