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Cross on opposite sides of the hole in case of crashes 943ef1409b Fix getting a bunch 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 https://www.analog.com/media/en/technical-documentation/data-sheets/199399fc.pdf TO-92 2-pin leads in-line, narrow, oval pads, drill 0.75mm (see NXP sot054_po.pdf TO-126-2, Horizontal, RM 1.7mm, MultiwattF-11, staggered type-1, see http://www.ti.com/lit/ds/symlink/lm3886.pdf TO-220F-11 Vertical RM 10.9mm TO-247-3, Horizontal, RM 3.81mm, see https://www.onsemi.com/pub/Collateral/NJL3281D-D.PDF TO-264-5 Horizontal RM 1.7mm PentawattF- MultiwattF-5 TO-220F-7, Vertical, RM 1.7mm, MultiwattF-11, staggered type-2, see http://www.st.com/resource/en/datasheet/l298.pdf TO-220-15 Vertical RM 4.58mm IPAK TO-251-3, Vertical, RM 2.54mm TO-220-4, Horizontal, RM 1.7mm, IIPAK, I2PAK, see http://pdf.datasheetcatalog.com/datasheet/irf/iris4011.pdf TO-262-5 Horizontal RM 1.7mm PentawattF- MultiwattF-5 TO-220F-5, Vertical, RM 5.08mm, see http://www.onsemi.com/pub/Collateral/FFPF10F150S-D.pdf TO-220F-2 Vertical RM 1.27mm staggered type-2 TO-220F-9 Vertical RM 1.7mm staggered.

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