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| J9 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-8/SOIC-8/TO-99-8 | | | | | C10 | 3 | A1M | Potentiometer | | C1 | 1 | LED | Light emitting diode, 5 mm LED 5 mm | | Tayda | A-1157 or A-2425 | | | | | | | J3, J4, J5 | 3 | A1M.

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