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BackOr quad would add very little cost even without 1v/oct, could be done externally with a diameter between 16-19 mm: https://www.keyelco.com/product.cfm/product_id/826 Keystone #500, 12mm CR1220 battery holder, http://www.keyelco.com/product-pdf.cfm?p=710 Battery holder for CR1216/1220/1225, https://linxtechnologies.com/wp/wp-content/uploads/bat-hld-012-smt.pdf battery holder for 18650 cylindrical cells http://www.keyelco.com/product.cfm/product_id/918 Keystone type 106 battery holder Keystone type 105 battery holder Keystone type 106 battery holder Keystone type 105 battery holder Keystone type 3008 coin cell retainer SMT battery holder Keystone 2xAAA cell battery holder, http://www.comf.com.tw/ProductDetail.asp?no=148 Keystone type 3034 coin cell vertical Cherry MX keyswitch, ISO Enter, PCB mount, https://www.neutrik.com/en/product/nc3fah A Series, 3 pole female XLR receptacle, grounding: mating connector shell and front panel, vertical PCB mount, https://www.neutrik.com/en/product/nc5mbv speakON Combo, 2 pole chassis connector, black D-size flange, countersunk thru holes, horizontal PCB mount, black chrome shell, https://www.neutrik.com/en/product/nc5mbh-b B Series, 3 pole female XLR receptacle, switching contacts, grounding: separate ground contact to mating connector shell and front panel, steel retention lug, lateral right PCB mount, https://www.neutrik.com/en/product/nc3mah A Series, 3 pole male XLR receptacle, grounding: mating connector shell and front panel, vertical PCB mount, https://www.neutrik.com/en/product/nc4mbv A Series, 5 pole male XLR receptacle, switching contacts, grounding: separate ground contact to mating connector shell and front panel, vertical PCB mount, https://www.neutrik.com/en/product/nc3fahl1 A Series, 3 pole XLR female receptacle with 6.35mm (1/4in) switching stereo jack without switching contact, vertical PCB mount, https://www.neutrik.com/en/product/nl4md-h-3 speakON Chassis Connectors, 4 pole chassis connector, black D-size flange, countersunk thru holes, vertical PCB mount, black chrome shell, https://www.neutrik.com/en/product/nc3fbh2-b B Series, 5 pole female XLR receptacle, grounding: mating connector shell and front panel, horizontal PCB mount, retention spring instead of latch, https://www.neutrik.com/en/product/nc3fav1-0 A Series, 3 pole XLR female receptacle with 6.35mm (1/4in) stereo jack, horizontal PCB mount, asymmetric push, https://www.neutrik.com/en/product/ncj6fa-v-da Combo A series, 3 pole female XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, horizontal PCB mount, asymmetric push, https://www.neutrik.com/en/product/nc3faav1-da AA Series, 3 pole male XLR receptacle, grounding: separate ground contact to mating connector shell and front panel: mini toggle: 4mm above panel, tight but possible mini toggle: ample space above 11.75mm (existing 1p12t rotaries, use 11.25mm holes to PCB edge 7.4799999999999995mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 37-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, male, pitch 2.29x1.98mm, pin-PCB-offset 3.0300000000000002mm, distance of mounting holes 63.5mm, distance of mounting holes 33.3mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 25-pin D-Sub connector horizontal.
- -5.766338e-03 -9.960008e-01 vertex -1.063449e+02 9.665134e+01 1.290579e+01.
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