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Update=Tue 20 Apr 2021 10:22:18 AM EDT R14, R15 values changed\ndue to availability Kassu used 1 µF \npolyester film looks much \nbetter. Low-Power, Quad-Operational Amplifiers, DIP-14/SOIC-14/SSOP-14 Quad operational amplifier, DIP-14 A-1135 2 8 pin DIP socket | | C7, C12, C13 | 1 | 1 | AudioJack2_SwitchT | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling) | | Tayda | A-1624 or A-2969 | | C6, C7, C8, C9 D1, D2, D3, D4, D5, D8, D9, D10 | 8 | 1N4148 | Standard switching diode, DO-35 2x5 pin shrouded header 2.54 mm spacing R23, R24, R25, R27 Switch, triple pole double throw .

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