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Long enough terminals, barely, to poke through the board, cross at 90° to minimize capacitance between traces - vias connect through the board, connecting a trace already use spokes where ground planes connect to holes - these gaps reduce heat conduction during soldering ground plane 56529bef3a0c7d0b31cfccd6b6ce971fb35b4e9c Updates from real TL0x4, fix pots being backwards, tighten up schematic, fit letter instead of latch, https://www.neutrik.com/en/product/nc3fah2-0 A Series, 5 pole male XLR receptacle, grounding: without ground / shell contact, vertical PCB mount, https://www.neutrik.com/en/product/nl4md-v speakON Chassis Connectors, 4 pole chassis connector, black D-size flange, self tapping screw holes (A-screw), horizontal PCB mount, https://www.neutrik.com/en/product/nl8md-v-1 speakON Chassis Connectors, 4 pole chassis connector, metal housing, vertical PCB Cherry MX keyswitch, 1.75u, plate mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch, 2.00u, PCB mount, https://www.neutrik.com/en/product/nc3maah AA Series, 3 pole male XLR receptacle, grounding: mating connector shell and front panel, horizontal PCB mount, https://www.neutrik.com/en/product/nc3mbhl B Series, 3 pole female XLR receptacle, grounding: mating connector shell to pin1 and front panel, vertical PCB mount, retention spring instead of latch, https://www.neutrik.com/en/product/nc3fahr2-0 A Series, 5 pole male XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, horizontal PCB mount, https://www.neutrik.com/en/product/nc3faav A Series, 3 pole female XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, vertical PCB mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch, 1.75u, PCB mount, retention spring, https://www.neutrik.com/en/product/ncj6fa-v-0 Combo A series, 3 pole female XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, horizontal PCB mount, https://www.neutrik.com/en/product/nc5fah A Series, 5 pole male XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, horizontal PCB mount, https://www.neutrik.com/en/product/ncj9fi-h-0 Combo I series, 3 pole male XLR receptacle, grounding: separate ground contact to mating connector shell and front panel: mini toggle: ample space above 11.75mm (existing 1p12t rotaries, use 11.25mm holes to PCB edge 11.32mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 25-pin D-Sub connector horizontal angled 90deg THT male pitch 2.29x1.98mm pin-PCB-offset 3.0300000000000002mm mounting-holes-distance 47.1mm mounting-hole-offset 47.1mm 44-pin D-Sub connector horizontal angled 90deg THT female pitch 2.29x1.98mm mounting holes 25mm, distance of mounting holes to PCB edge 10.889999999999999mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 37-pin D-Sub connector straight vertical THT male pitch 2.29x1.98mm mounting holes 33.3mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 15-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, female, pitch 2.77x2.84mm, pin-PCB-offset 4.9399999999999995mm, distance of mounting holes 33.3mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 37-pin D-Sub connector straight vertical THT male pitch 2.29x1.98mm pin-PCB-offset 3.0300000000000002mm mounting-holes-distance 25mm mounting-hole-offset 25mm 15-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, male, pitch 2.29x2.54mm, pin-PCB-offset 9.4mm, see http://docs-europe.electrocomponents.com/webdocs/1585/0900766b81585df2.pdf 37-pin D-Sub connector, horizontal/angled (90.

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