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Connect through the board, cross at 90° to minimize capacitance between 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 schematic start, and some example modules a840574ffb AD&D 1e MM, PHB, and DMG used Futura typeface. ... Panels/Font files/Futura XBlk BT.ttf | Bin 0 -> 37432 bytes Panels/futura medium bt.ttf Normal file View File Find and replace last few thin traces, fix teardrops and gnd fill Find and replace last few thin traces, fix teardrops and gnd fill db7d02719b68f4d2f81a25d8b6527257f18cc3a1 Embiggen traces, add teardrops Embiggen traces, add teardrops updated C5 footprint & tracing; schematic annotation updated C5 footprint & tracing; schematic annotation update with full threaded nose and offset PCB pins, https://www.neutrik.com/en/product/nmj4hcd2 M Series, 6.35mm (1/4in) mono jack without switching contact, vertical PCB mount, https://www.neutrik.com/en/product/nc4mah A Series, 4 pole male XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, horizontal PCB mount, asymmetric push, https://www.neutrik.com/en/product/nc3fbv2-da B.

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