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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 number of pins: 13; pin pitch: 5.08mm; Vertical; threaded flange || order number: 1757598 12A Generic Phoenix Contact connector footprint for: MCV_1,5/4-G-5.08; number of pins: 06; pin pitch: 3.50mm; Angled; threaded flange || order number: 1757381 12A Generic Phoenix Contact connector footprint for: MC_1,5/12-GF-3.5; number of pins: 04; pin pitch: 3.81mm; Angled; threaded flange || order number: 1776566 12A || order number: 1829219 12A 630V Generic Phoenix Contact connector footprint for: MC_1,5/12-G-3.81; number of pins: 12; pin pitch: 5.00mm; Vertical; threaded flange || order number: 1924318 16A (HC Generic Phoenix Contact connector footprint for: MCV_1,5/2-G-3.5; number of pins: 06; pin pitch: 5.08mm; Angled; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x6.5 C or ISO 7049-ST 2.2x4.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1803277 8A 160V Generic Phoenix Contact connector footprint for: MSTBV_2,5/4-GF-5,08; number of pins: 10; pin pitch: 5.08mm; Vertical || order number: 1827952 8A 160V Generic Phoenix Contact SPT 2.5/9-H-5.0-EX 1732454 Connector Phoenix Contact, SPT 5/11-H-7.5-ZB 1719286 Connector Phoenix Contact connector footprint for: GMSTBV_2,5/6-GF-7,62; number of pins: 06; pin pitch: 5.00mm; Angled; threaded flange || order number: 1757297 12A || order number: 1843253 8A 160V Generic Phoenix Contact SPT 2.5/1-H-5.0 Terminal Block, 1738144 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1738144), generated with kicad-footprint-generator Molex Pico-Lock series connector, B08B-XASK-1 (http://www.jst-mfg.com/product/pdf/eng/eXA1.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole M3, height 1, Wuerth electronics 9774080243 (https://katalog.we-online.de/em/datasheet/9774080243.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py LGA, 14 Pin (http://www.st.com/resource/en/datasheet/lis2dh.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py Diodes Incorporated PowerDI3333-8 UXC, 3.05x3.05x0.8mm Body, https://www.diodes.com/assets/Package-Files/PowerDI3333-8%20(Type%20UXC).pdf Infineon, PG-TDSON-8, 6.15x5.15x1mm, https://www.infineon.com/dgdl/Infineon-BSC520N15NS3_-DS-v02_02-en.pdf?fileId=db3a30432239cccd0122eee57d9b21a4 X1SON 2 pin Molex connector 2.54 mm spacing | | | Tayda | A-4755 | | Tayda | A-826 | | J2 | 1 | Conn_01x07 | *(optional) SIP socket, 2.54 mm, 1x4 | | | J7 | 1 README.md | 4 Docs/precadsr_bom.md | 3 | 1k | Resistor | | Q1, Q2, Q3, Q4, Q5 R1, R2, R23, R24 R3, R21, R27, R28 R4, R6, R7, R30, R31 | 1 | 10R | Resistor | | R14.

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