You can find the schematic here :
https://www.diyaudio.com/forums/tubes-valves/213042-optimation-pa-250ac-lab-grade-audio-amplifier-2....
You can find the schematic here : https://www.diyaudio.com/forums/tubes-valves/213042-optimation-pa-250ac-lab-grade-audio-amplifier-2.... |