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BackWaterproof 6.35mm (1/4 in) Vertical Jack, 2 Poles (Mono / TS) | | | | L1 | 1 | SW_Push | Push button switch, generic, two pins K switch normally-open pushbutton push-button LED D MEC 5E single pole double throw, separate symbols Quad Low-Noise JFET-Input Operational Amplifiers, DIP-14/SOIC-14 | | | | | | | | | | | Tayda | A-826 | | | Screws and spacers (see [build notes](build.md | | | | | | | | | R4, R6, R7, R30, R31 | 5 | 2N3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 | | | | | R25, R27, R29 | 3 | AudioJack2 | Audio Jack, 2 Poles (Mono / TS)"/>