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BackLib="ao_symbols" part="TL074" description="Quad Low-Noise JFET-Input Operational Amplifiers, DIP-14/SOIC-14"/> everything done as 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¢.
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