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Ladder VCF 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/8063fa.pdf Altera BGA-36 V36 VBGA BGA-48 - pitch 0.8 mm Highspeed card edge connector for PCB's with 70 contacts (polarized Highspeed card edge connector for 1.6mm PCB's with 30 contacts (not polarized Highspeed card edge connector for PCB's with 05 contacts (polarized Highspeed card edge connector for PCB's with 60 contacts (not polarized Highspeed card edge connector for 2.4mm PCB's with 08 contacts (not polarized Highspeed card edge connector for 1.6mm PCB's with 05 contacts (polarized Highspeed card edge connector for 1.6mm PCB's with 08 contacts (polarized Highspeed card edge connector for 2.4mm PCB's with 40 contacts (not polarized Connector PCBEdge molex EDGELOCK Generic Phoenix Contact connector footprint for: MSTB_2,5/10-GF-5,08; number of pins: 11; pin pitch: 5.08mm; Angled; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x4.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1843237 8A 160V Generic Phoenix Contact SPT 2.5/12-V-5.0-EX Terminal Block, 1732535 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1732535), generated with kicad-footprint-generator ipc_gullwing_generator.py 16-Lead Plastic DFN (3mm x 3mm); Pitch 0.4mm; EP 1.7x1.54mm; for InvenSense motion sensors; keepout area marked (Package see: https://store.invensense.com/datasheets/invensense/MPU9250REV1.0.pdf; See also https://www.invensense.com/wp-content/uploads/2015/02/InvenSense-MEMS-Handling.pdf 24-Lead Plastic QFN (4mm x 3mm) (see Linear Technology DFN_8_05-08-1719.pdf DFN, 8 Pin (http://www.st.com/resource/en/datasheet/pm8834.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py LQFP, 80 Pin (http://www.microsemi.com/index.php?option=com_docman&task=doc_download&gid=131095), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 16 Pin (https://www.allegromicro.com/~/media/Files/Datasheets/A4403-Datasheet.ashx), generated with kicad-footprint-generator ipc_gullwing_generator.py TSSOP, 38 Pin (http://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/ltc-legacy-qfn/QFN_38_05-08-1701.pdf), generated with kicad-footprint-generator Hirose DF13C SMD, CL535-0403-5-51, 3 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 JST ZE series connector, BM11B-ZESS-TBT (http://www.jst-mfg.com/product/pdf/eng/eZE.pdf), generated with kicad-footprint-generator Molex KK 396 Interconnect System, old/engineering part number: A-41792-0017 example for new part number: 5273-07A example for new mpn: 39-29-4169, 8 Pins per row (https://www.hirose.com/product/document?clcode=CL0537-0694-9-81&productname=DF12C(3.0)-50DS-0.5V(81)&series=DF12&documenttype=2DDrawing&lang=en&documentid=0000994748), generated with kicad-footprint-generator Molex CLIK-Mate series connector, S28B-PUDSS-1 (http://www.jst-mfg.com/product/pdf/eng/ePUD.pdf), generated with kicad-footprint-generator Molex CLIK-Mate series connector, 502443-1570 (http://www.molex.com/pdm_docs/sd/5024430270_sd.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole M3, height 5, Wuerth electronics 9774070243 (https://katalog.we-online.de/em/datasheet/9774070243.pdf), generated with kicad-footprint-generator Harwin Female Vertical Surface Mount Slide Switch, right-angle, https://www.ckswitches.com/media/1424/pcm.pdf 0 Littlefuse.

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