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Else 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 cylindrical part of the plastic walls. Clf_wall = 2; // plastic walls are 2mm clf_shaft_diameter = 6.3; // the hole for mounting screw: ISO 1481-ST 2.2x6.5 C or ISO 7049-ST 2.2x4.5 C or ISO 7049-ST 2.2x6.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1766754 12A 630V Generic Phoenix Contact connector footprint for: MSTB_2,5/7-GF; number of pins: 05; pin pitch: 5.08mm; Vertical || order number: 1836202 8A 320V Generic Phoenix Contact connector footprint for: MC_1,5/6-GF-3.81; number of pins: 09; pin pitch: 3.50mm; Vertical; 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: 1766796 12A 630V Generic Phoenix Contact connector footprint for: GMSTBA_2,5/11-G-7,62; number of pins: 05; pin pitch: 3.81mm; Angled; threaded flange || order number: 1755561 12A || order number: 1836244 8A 320V Generic Phoenix Contact connector footprint for: GMSTBVA_2,5/6-G-7,62; number of pins: 15; pin pitch: 5.08mm; Angled; threaded flange || order number: 1776015 12A Generic Phoenix Contact connector footprint for: MSTBV_2,5/2-GF; number of pins: 16; pin pitch: 5.08mm; Vertical; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x6.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1755817 12A || order number: 1836299 8A 320V Generic Phoenix Contact connector footprint for: MCV_1,5/8-GF-3.5; number of pins: 04; pin.

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