Labels Milestones
Back(4) potentiometers, either 9 mm or 16 mm vertical board mount OR: | | | | | S3 | 1 | B20k | Potentiometer | | | | R3, R21, R27, R28 R4, R6, R7 | 2 | 1N5817 | Schottky diode | | | | C2 | 1 | SW_DPDT_x2 | Switch, triple pole double throw, separate symbols | | J7, J8, J9 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-14/SOIC-14"/>