Acetone_PS1000_6 Published December 13, 2016 - size: 1616 × 1078 in Inside the Ace Tone PS1000 Monophonic Synth ← Previous Next → Missing parts: one diode (D20), one op amp (Q46), two resistors (R43, R44) and a balance trim pot (bottom left). IC3 is the voltage follower, the hold capacitor is on its right. Read More...