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Documentation: * [Schematic](Docs/precadsr.pdf) * PCB layout: make power connection traces larger; MK uses a CA3080 OTA, an expensive 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 supporting components. ~$6 in parts, depending on exact order number), See: http://katalog.we-online.de/em/datasheet/6941xx301002.pdf Compact Flash Card connector, normal polarization (https://multimedia.3m.com/mws/media/22424O/3mtm-cf-card-header-type-i-low-profile-surface-mount-ts0747.pdf SD, SMD, right-angle, push-pull (https://www.hirose.com/product/en/download_file/key_name/DM3BT-DSF-PEJS/category/Drawing%20(2D)/doc_file_id/44097/?file_category_id=6&item_id=06090029900&is_series= Micro SD, SMD, right-angle, push-pull (https://www.hirose.com/product/en/download_file/key_name/DM3BT-DSF-PEJS/category/Drawing%20(2D)/doc_file_id/44097/?file_category_id=6&item_id=06090029900&is_series= Micro SD, SMD, top-mount, push-push (https://www.hirose.com/product/document?clcode=CL0609-0004-8-82&productname=DM1AA-SF-PEJ(82)&series=DM1&documenttype=2DDrawing&lang=en&documentid=0000915301 Hirose FH41, FFC/FPC connector, FH12-18S-0.5SH, 18 Pins (http://www.farnell.com/datasheets/2157639.pdf), generated with kicad-footprint-generator Molex Panelmate series connector, BM14B-GHS-TBT (http://www.jst-mfg.com/product/pdf/eng/eGH.pdf), generated with kicad-footprint-generator Hirose series connector, S8B-PH-K (http://www.jst-mfg.com/product/pdf/eng/ePH.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py TSSOP, 24 Pin (http://www.thatcorp.com/datashts/THAT_5173_Datasheet.pdf#page=17), generated with kicad-footprint-generator ipc_noLead_generator.py WSON6 3*3 MM, 0.95 PITCH; CASE 506AH-01 (see ON Semiconductor 932AZ.PDF TQFP128 14x14 / TQFP120 CASE 932AZ (see ON Semiconductor Micro8.

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