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And rare chip these days ($3/ea on amazon, maybe fakes) VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some example modules Latest commits for file Schematics/Dual_VCA_with_cv2_OTA.diy Start of LM13700 version to see why main *-backups Forget (and ignore) fp-info-cache file as it is based on https://www.analog.com/media/en/technical-documentation/data-sheets/199399fc.pdf TO-92 2-pin leads in-line, wide, drill 0.75mm TO-92Flat package, often used for hall sensors, drill 0.75mm (https://www.diodes.com/assets/Package-Files/TO92S%20(Type%20B).pdf TO-92S_Wide package, drill 0.6mm (https://media.digikey.com/pdf/Data%20Sheets/Infineon%20PDFs/KT,KTY.pdf TO-92S package, 2-pin, drill 0.75mm (https://www.diodes.com/assets/Package-Files/TO92S%20(Type%20B).pdf TO-92 leads molded, wide, drill 0.75mm (https://www.diodes.com/assets/Package-Files/TO92S%20(Type%20B).pdf TO-92 leads in-line, wide, drill 0.75mm (see NXP sot054_po.pdf TO-92 horizontal, leads molded, narrow, drill 0.75mm (see NXP SSOP-TSSOP-VSO-REFLOW.pdf and sot266-1_po.pdf SSOP, 20 Pin (JEDEC MO-153 Var JC https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator Molex PicoBlade series connector, B7PS-VH (http://www.jst-mfg.com/product/pdf/eng/eVH.pdf), generated with kicad-footprint-generator Resistor SMD 4020 (10251 Metric), square (rectangular) end terminal, IPC_7351 nominal with elongated pad for handsoldering. (Body size from: http://datasheets.avx.com/F72-F75.pdf), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for 5 times 0.75.

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