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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 Envelope/Envelope.kicad_pcb | 2 | 1N5817 | Schottky diode | Tayda | A-804 | | | Tayda | A-004 | | | | | | R17, R19 | 3 | 4.7k | Resistor | | | J9 | 3 | 4.7k | Resistor | | C6, C7, C8, C9 | 4 .../PCB/precadsr_Gerbers/precadsr-job.gbrjob | 2 .../Unseen Servant/Unseen Servant.kicad_pro | 6 Panels/FIREBALL VCO.png | Bin 0 -> 11310848 bytes Synth_Manuals/Module Summaries.ods Normal file Unescape Hardware/Panel/precadsr_panel_al/precadsr_panel_al.kicad_pcb Normal file Unescape Hardware/PCB/precadsr/ao_tht.pretty/Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles.kicad_mod Normal file View File 3D Printing/Panels/FIREBALL VCO.png Normal file Unescape Schematics/Unseen Servant/Unseen Servant_slider_board_noncanonical.kicad_prl main synth_tools/3D Printing/Pot_Knobs/Pot Knob in.

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