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4 | 100nF | Ceramic capacitor | | | | | | | C1, C11, C12 | 1 | AudioJack2_SwitchT | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling)"/> Quad operational amplifier, DIP-14 | | | Screws, nuts, and spacers (see [build notes](build.md | | J2 | 1 | TL074 | Quad operational amplifier, DIP-14

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