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To 10 nF | Unpolarized capacitor | | | | S1 | 1 | Conn_01x02 | SIP socket, 2.54 mm, 1x4 | | | C13 | 1 | 2_pin_Molex_connector | KK254 Molex connector 2.54 mm spacing D 3 pin Molex connector 2.54 mm spacing 3 pin Molex header | | Tayda | A-1138 | | | Tayda | A-3186 | | | | | | R20, R22 | 3 | AudioJack2 | Audio Jack, 2 Poles (Mono / TS) Low-Power, Quad-Operational Amplifiers, DIP-14/SOIC-14/SSOP-14 Dual Operational Amplifiers, DIP-14/SOIC-14 | | Tayda | A-1605 | | | | | | | | R21, R22, R23 | 3 | 4.7k | Resistor | | | | | C6, C7, C8, C9 | 4 | 100k | Resistor | | | | | Tayda | A-3186 | | | C7, C11 | 3 | A1M | Potentiometer | | R16, R18, R26 | 3 | A1M | **Potentiometer, 9 mm or 16 mm pots had long enough terminals, barely, to poke through the board, adding an extra cross-board wire is needed, vs 3 if the hole in the same size as traces - .3mm for non-power lines, .6mm if carrying power - MK uses a CA3080 OTA, an expensive and rare chip these days ($3/ea on amazon, maybe fakes) VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some example modules.

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