If you used sockets for your JFETs, it could be a matter of trying out different ones, which is exactly what I did.
But if you didn't, I highly recommend you do use sockets on your new build!
Sooooo, turns out you were all correct and I'm stupid. I turned Sag fully CCW, swapped the J201s that were there for a pair that biased right around 6V, and now the Sag control really makes a difference.
I recorded a quick clip demonstrating it. It starts with the bypass sound (guitar straight...
You all just made me realize the position of the Sag pot should be taken into consideration when biasing. It looks like fully CCW, whatever comes through the power supply is provided to the circuit. As you turn the Sag control CW, it lowers the current going into the circuit. Which means I...
Ah, and my J201s are a mix between Mouser (InterFET), GuitarPCB (Fairchild) and Pedal Hacker (Fairchild).
The ones that brought the drain voltages to the 4V range were the ones from ON Semi, all the Fairchild ones had significantly lower Vgs(off).
I did check the drain voltages, they're somewhere between 4V and 4.5V on both. I tend to run my amp fairly hot, though, so maybe the effects aren't as pronounced?
Thanks, Tim!
The sag control is very subtle. It seems to have some effect on the high end content, at least in my build and rig. But it's fun.
I used clipped leads from carbon comp resistors and diodes (the thicker ones) as jumpers on the 3PDT.
One more build that had been sitting in the queue for far too long and I finally wrapped it up tonight: the Chop Shop. Sounds great! I tend to like discrete overdrives more than opamp-based ones, and this one confirms it. Went with another Gørva enclosure, but decided to use a bare one to sort...
If you noticed, you must be as OCD as I am. And now that I looked more closely, it seems a little off! Haha have you also noticed the footswitch nut is pointing up, and also a little off? I'm a failure! 😂
Anyway, thanks for the kind words, Jamie!