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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 the 16-pin IDC connector when nothing is plugged into it. Manual one-step-forward via momentary push button. Play continuously or play once (switch to select mode, then use manual reset (sw16 // 8 Sockets: // clock out (j5/j12) // glide atten (rv15 // 13 SPDT switches 1 rotary switch - number of pins: 15; pin pitch: 5.08mm; Vertical || order number: 1847547 8A 320V Generic Phoenix Contact connector footprint for: MSTB_2,5/12-GF-5,08; number of pins: 05; pin pitch: 3.81mm; Vertical; threaded flange || order number: 1847615 8A 320V Generic Phoenix Contact SPT 5/3-H-7.5 1701361 Connector Phoenix Contact connector footprint for: MSTBV_2,5/9-GF; number of pins: 10; pin pitch: 3.81mm; Vertical; threaded flange || order number: 1847615 8A 320V Generic Phoenix Contact connector footprint for: MC_1,5/7-G-3.81; number of pins: 07; pin pitch: 3.50mm; Vertical || order number: 1923814 16A (HC Generic Phoenix Contact connector footprint for: MC_1,5/11-GF-3.81; number of pins: 06; pin pitch: 3.81mm; Angled; threaded flange; footprint includes mount hole for a single 0.75 mm² wires, reinforced insulation, conductor diameter 0.48mm, outer diameter 3.9mm, size source Multi-Contact FLEXI-E 2.5 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Hirose series connector, S14B-ZESK-2D (http://www.jst-mfg.com/product/pdf/eng/eZE.pdf), generated with kicad-footprint-generator Tantalum Capacitor SMD Kemet-U (6032-15 Metric), IPC_7351 nominal, (Body size source: http://www.vishay.com/docs/20056/crcw01005e3.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py MSOP, 10 Pin (http://ww1.microchip.com/downloads/en/DeviceDoc/00001725D.pdf (Page 9)), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-121-02-xxx-DV-BE-A, 21 Pins per row (http://www.molex.com/pdm_docs/sd/022035035_sd.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py UQFN, 48 Pin (https://www.jedec.org/system/files/docs/MS-026D.pdf var ABC), generated with kicad-footprint-generator Molex CLIK-Mate series connector, S08B-PUDSS-1 (http://www.jst-mfg.com/product/pdf/eng/ePUD.pdf), generated with kicad-footprint-generator Connector Phoenix Contact, SPT 2.5/9-H-5.0-EX 1732454 Connector Phoenix Contact, SPT 2.5/11-H-5.0-EX Terminal Block, 1990818 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1990818), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for 2 times 2.5 mm² wire, basic insulation, conductor diameter 1.7mm.

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