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Pole (Normalling Audio Jack, 2 Poles (Mono / TS) | | S1 | 1 | B20k | Potentiometer | | R4, R6, R7, R30, R31 Switch, dual pole double throw, illuminated paddle, red and green LEDs K switch single-pole double-throw spdt ON-ON D Push button switch OFF-(ON CMOS General Purpose Timer, 555 compatible, PDIP-8 Quad operational amplifier, DIP-14 | | | | | | | | Tayda | A-1157 or A-2425 | | | | D6, D7 | 2 | 1N5817 | Schottky diode | .

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