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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/8063fa.pdf Altera BGA-36 V36 VBGA BGA-48 - pitch 0.8 mm Highspeed card edge connector for PCB's with 60 contacts (polarized Highspeed card edge connector for 1.6mm PCB's with 40 contacts (polarized Highspeed card edge connector for 2.4mm 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 20 contacts (polarized Highspeed card edge connector for 2.4mm PCB's with 05 contacts (not polarized Highspeed card edge connector for 2.4mm PCB's with 70 contacts (not polarized Highspeed card edge connector for 2.4mm PCB's with 40 contacts (not polarized Highspeed card edge connector for panel, 90° PCB mount (https://www.amphenolltw.com/2012download/2D%20PDF/03_M%20Series%20Sensor%20Connectors/M8S-XXPMMR-SF8001.pdf 3.5 mm, Stereo, Right Angle, Bayonet, 50Ohm, 4GHz, https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Customer+Drawing%7F1478035%7FB1%7Fpdf%7FEnglish%7FENG_CD_1478035_B1.pdf%7F1-1478035-0 BNC RF interface bayonet 50ohm BNC female PCB mount 4 pin, 1.0mm round THT pads Net tie, 4 pin, 2.0mm square SMD pads Net tie, 2 pin, 0.5mm square SMD pads Net tie, 4 pin, 2.0mm square SMD pads Net tie, 4 pin, 1.0mm round THT pads.

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