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Https://www.neutrik.com/en/product/nc3fbv1-da B Series, 4 pole male XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, vertical PCB mount, retention spring instead of latch, https://www.neutrik.com/en/product/nc3fav2-0 A Series, 3 pole male XLR receptacle, grounding: mating connector shell to pin1 and front panel, vertical PCB mount, https://www.neutrik.com/en/product/nc3mahr A Series, 3 pole XLR female receptacle with 6.35mm (1/4in) stereo jack without switching contact, vertical PCB mount, asymmetric push, https://www.neutrik.com/en/product/ncj6fa-h-da Combo A series, 3 pole female receptacle, grounding: separate ground contact to mating connector shell to pin1 and front panel, horizontal PCB mount, replaces NL4MD-V, NL4MD-V-R, NL4MD-V-S, https://www.neutrik.com/en/product/nl4mdxx-v speakON Chassis Connectors, 4 pole chassis connector, black D-size flange, self tapping screw holes (A-screw), vertical PCB mount, https://www.neutrik.com/en/product/nc3mbv A Series, 3 pole female XLR receptacle, grounding: ground contact to mating connector shell and front panel. Opportunities abound for aesthetic choices. Determine appropriate stand-off hardware for connecting front panel candidates v1 and v2

Added schmancy pcb for v2 front panel 24ca7abc85681936397a2802c8155420fcaf679c updated C14 footprint, traces, groundplane updated C5 footprint & tracing; schematic annotation Add 55k-ish resistor to coarse knob (doublecheck this placement). Actual value unclear (see below).

Argument for a single 1 mm² wires, basic insulation, conductor diameter 0.65mm, outer diameter 3.9mm, size source Multi-Contact FLEXI-2V 0.25 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Molex CLIK-Mate series connector, LY20-40P-DLT1, 20 Circuits (http://www.jae.com/z-en/pdf_download_exec.cfm?param=SJ038187.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 28 Pin (http://www.ti.com/lit/ds/symlink/tps51363.pdf#page=29), generated with kicad-footprint-generator Mounting Hardware, inside blind hole M1.6, height 6, Wuerth electronics 9774015243 (https://katalog.we-online.de/em/datasheet/9774015243.pdf), generated with kicad-footprint-generator Samtec.

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