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Part="LM2902"> Low-Power, Quad-Operational Amplifiers, DIP-14/SOIC-14/SSOP-14 Dual Operational Amplifiers, DIP-14/SOIC-14 | | R21, R22, R23 | 3 | A1M | Potentiometer | | J1 | 1 | 4.7 uF | Polarized capacitor | | | | | R14 | 1 | AudioJack2_SwitchT.

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