It’s a famous tube amplifier’s bright channel with ECC83/12AX7 tube. We had an idea to operate it to low voltage.
Because it was quiet low we had to complate it with a J201 transistor.
Sound test:
Clean tone:
Gain knob 3/4 positions • used: GreenZ pedal
Dry and biting tones/full gain • used: GreenZ pedal