I got the 2sj103 from my bag of fets, I think it's obsolete now in through-hole format. I think it was a leftover from back when I used to repair Yamaha audio products. It's not too twitchy to adjust, I used single turn pots for my build.
Datasheet:
https://www.promelec.ru/pdf/2SJ103.pdf
The pinout requires criss-crossing leads for your PCB layout.
Datasheet:
https://www.promelec.ru/pdf/2SJ103.pdf
The pinout requires criss-crossing leads for your PCB layout.