08-05-2020, 11:47 PM
I meant instability as in source/drain runaway, caused (I know now) by the adjustment pot being the wrong side of the source resistor. It's that way in the Dave Allen drawing, not sure if it's a mistake or if it worked that way for him but with the bias pot return going to the bottom of the source resistor now it's stable at 50mA no matter what I do with the volume control.
I did have some issues early on with oscillation although mainly AF, but all seems good now & have been running the set most of the afternoon pulling in Absolute '40s on the long wire admirably well. I'll be redrawing the circuit as it stands now & will post it here as well as on VRRR in case it's of use to others.
Cheers, Dan.
I did have some issues early on with oscillation although mainly AF, but all seems good now & have been running the set most of the afternoon pulling in Absolute '40s on the long wire admirably well. I'll be redrawing the circuit as it stands now & will post it here as well as on VRRR in case it's of use to others.
Cheers, Dan.
