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A vendor? VCF MK's Diode 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 the GitHub page (they'll have "@ something" after them) and download them as separate sheet .../OttosIrresistableDance.kicad_pro | 11 Documentation, some cosmetic sh/PCB updates Docs/precadsr.pdf | Bin 0 -> 407684 bytes Panels/luther_triangle_vco_quentin_v2.scad | 18 Panels/luther_triangle_vco_quentin_v3.scad | 14 ...ther_triangle_vco_quentin_v3_blank.stl.stl | Bin 0 -> 2441420 bytes Synth_Manuals/LABOR_MANUAL.pdf | Bin 0 -> 11930 bytes create.

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