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EL\n(higher output, less leakage)\nbut only by a little. 1 µF \npolyester film looks much \nbetter. Low-Power, Quad-Operational Amplifiers, DIP-14/SOIC-14/SSOP-14 Dual Operational Amplifiers, DIP-14/SOIC-14 | | | C13 | 3 | A1M | Potentiometer | | | C12 | 3 | 100R | Resistor | | Tayda | A-1672 | | R9, R11, R13 | 3 | 2N3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 | | | | | U1 | 1 | 10 nF ## Erratum C13 is marked on the lower.

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