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Or A-3487\*\*\* | | | J7 | 1 | 100k | Resistor | | | | | C3 | 1 nF | Unpolarized capacitor | | | | | C7, C12, C13 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-14/SOIC-14 | | | Tayda | A-804 | | | | | R4, R6, R7 | 3 | 100R | Resistor | | J2 | 1 | Conn_01x07 | *(optional) SIP socket, 2.54 mm, 1x10 Pin header, 2.54 mm, 1x7 | | R25, R27, R29 | 3 | 10k | Resistor | | | | | | | J2 | 1 | 1 | 10nF | Ceramic capacitor | | R25, R27, R29 | 3 | 2N3904 | Small Signal NPN Transistor, TO-92 | | | | | | | R9, R11, R13 | 3 | AudioJack2 | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling) | | | | | | | | .

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