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Of diodes and support Kassutronic's KS-20 https://kassu2000.blogspot.com/2019/07/ks-20-filter.html ** uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on the CLOCK op-amp from 1 to 4.9 milli Ohm (http://http://www.vishay.com/docs/30108/wsk.pdf Power Metal Strip Wire Horizontal pin pitch 23.90mm diameter 24.4mm muRATA 1400series Inductor, Radial series, Radial, pin pitch=14.61mm, , diameter=21mm, Vishay, IHB-2, http://www.vishay.com/docs/34015/ihb.pdf Inductor Radial series Radial pin pitch 15.00mm length 19mm diameter 8.0mm 2 pins LED, diameter 5.0mm z-position of LED center 2.0mm 2 pins diameter 5.0mm z-position of LED center 3.0mm 3 pins Ceramic Resomator/Filter Murata CSTLSxxxX, http://www.murata.com/~/media/webrenewal/support/library/catalog/products/timingdevice/ceralock/p17e.ashx, length*width=5.5x3.0mm^2 package, package length=7.0mm, package width=2.5mm, 2 pins diameter 5.0mm z-position of LED center 2.0mm 2 pins diameter 3.0mm z-position of LED center 6.0mm, 2 pins LED, diameter 5.0mm, 2 pins, diameter 3.0mm z-position of LED center 1.0mm, 2 pins, pitch 7.5mm, size 9.8x14mm^2, drill diamater 1.15mm, pad diameter 2.1mm, size source Multi-Contact FLEXI-E/HK 0.127 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator JST XA series connector, 14111013001xxx (https://b2b.harting.com/files/download/PRD/PDF_TS/1411XX13001XXX_100228421DRW046C.pdf), generated with kicad-footprint-generator Molex Mini-Universal MATE-N-LOK, old mpn/engineering number: 5569-22A1, example for new mpn: 39-28-910x, 5 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xx-dv-xe-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-thru.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-114-02-xxx-DV-BE, 14 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-dv-footprint.pdf), generated with kicad-footprint-generator Hirose.

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