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### Photos ## Documentation: * [Schematic](Docs/precadsr.pdf) * PCB layout: make power connection traces larger; 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 schematic start, and some example modules Envelope/Envelope.kicad_pcb | 2 | 10k | Resistor | | J12 | 1 | SW_SPDT | SPDT miniature toggle switch - number of pins: 13; pin pitch: 5.08mm; Vertical; threaded flange || order number: 1827884 8A 160V Generic Phoenix Contact SPT 5/2-V-7.5 Terminal Block, 1732399 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1732399), generated with kicad-footprint-generator connector wire 1.5sqmm strain-relief Soldered wire connection, for 2 times 2.5 mm² wire, reinforced insulation, conductor diameter 1.4mm, outer diameter 3.9mm, size source Multi-Contact FLEXI-E 0.15 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times 1 mm² wires, basic insulation, conductor diameter 1.4mm, outer diameter 3.5mm, size 52.5x7.6mm^2, drill diamater 1.5mm, 2 pads, pad diameter 3mm, see , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_WAGO THT Terminal Block WAGO 236-216.

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