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BackWant C3 and C4 could use slightly larger spacing - C7 is a ceramic 104 power cap like C5, C6, C8, C9 | 1 | B10k | \*\*Potentiometer, 9 mm vertical board mount. Only 16 mm vertical board mount. \*\* Use only four (4) potentiometers, either 9 mm vertical board mount | | | | | S2 | 1 | TL074 | Quad operational amplifier, DIP-14