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DO-41 | | R15, R17, R19 | 3 | 22k | Resistor | | | R4, R6, R7, R30, R31 | 1 | B10k | \*\*Potentiometer, 9 mm or 16 mm vertical board mount. \*\* Use only four (4) potentiometers, either 9 mm vertical board mount OR: | | | C12 | 2 | 1N5817 | Schottky diode | | J1 | 1 uF | Unpolarized capacitor | | | | | Q1, Q2, Q3, Q4, Q5 R1, R2, R23, R24 R3, R21, R27, R28 R4, R6, R7, R30, R31 Switch, dual pole double throw, right angle, PTS645VL83-2 LFS tactile.

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