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| C13 | 3 | 1nF | Film capacitor | | L1 | 1 | | | | S3 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-14/SOIC-14 | | | U1 | 1 nF | Unpolarized capacitor | | J12 | 1 aoKicad | 2 | 1M | Resistor | | | | | Tayda | A-3588 | \** Use only four (4) potentiometers, either 9 mm vertical board mount | | | J2 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-14/SOIC-14"/>

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