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BackHttps://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.
- (https://katalog.we-online.de/em/datasheet/9774010243.pdf), generated with kicad-footprint-generator Samtec HLE.
- SMD 1x23 1.00mm single row style2.
- BGA-624, 25x25 grid, 21x21mm.
- Normal 0.957361 0.114987 0.265023 facet normal 5.035335e-001 2.242198e-003.