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C2 | 1 | 1uF | Film capacitor | | 1 | B10k | \*\*Potentiometer, 9 mm or 16 mm vertical board mount OR: | | | | Tayda | A-1672 | | | | R2, R5 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-8/SOIC-8/TSSOP-8/VSSOP-8 Audio Jack, 2 Poles (Mono / TS) | | | | | R4, R6, R7, R30, R31 | 1 | SW_3PDT_x3 | Switch, single pole normally-open tactile switch https://cdn.sos.sk/productdata/80/f6/aabf7be6/5gth9358222.pdf Switch NKK G1xJP http://www.nkkswitches.com/pdf/gwillum.pdf SWITCH TOGGLE ILLUM SPDT NKK.