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| 100k | Resistor | | | | | | | R114 | 1 uF | Polarized capacitor | | | | R9 | 1 nF | Unpolarized capacitor | | | | | | | | | | U1 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-14/SOIC-14 | | | | | 2 | 1nF | Film capacitor | | | | | | C10 | 1 | 3_pin_Molex_header | 3 | AudioJack2 | Audio Jack, 2 Poles (Mono / TS) Operational amplifier, DIP-8 100V 0.15A standard switching diode, DO-35 Pin header 2.54 mm spacing | Tayda | A-553 | | Tayda | A-2939 | | J12 | 1 | 3_pin_Molex_header | 3 | 4.7k | Resistor | | U3 | 1 | LM358 | Low-Power, Dual Operational Amplifiers, DIP-8/SOIC-8/TO-99-8 | | Tayda | A-553 | | | R5, R29 | 3 | 100R | Resistor.

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