Labels Milestones
BackTO-92 R16, R17, R19, R20 **Potentiometer, 9 mm or 16 mm vertical board mount | | R16, R18, R26 | 3 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-14/SOIC-14 | | L1 | 1 nF | Unpolarized capacitor | | | Screws and spacers (see [build notes](build.md)) | | | J1 | 1 | LED | Light emitting diode Push button switch, generic, two pins Switch, single pole double throw, separate symbols | | R3, R7 | 3 | 10uF | Polarized capacitor | | U1 | 1 | AudioJack2_SwitchT | Audio Jack, 2 Poles (Mono / TS)