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BackHard_sync Merge pull request 'Finish schematic, add PDF' (#2) from schematic by Eeschema 5.1.10-88a1d61d58~90~ubuntu20.04.1 Component Count: 76 Refs C2, C5, C6, C8, C9 | 1 | B20k | Potentiometer | | C9 | 1 | Conn_01x04 | Pin header, 2.54 mm, 1x2 (see [build notes](build.md)) | | | | | S3 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-14/SOIC-14"/>
- Mount, https://www.neutrik.com/en/product/nc3faah2 AA Series, 3 pole.
- Https://www.diodes.com/assets/Package-Files/TO126.pdf TO-126-3 Horizontal RM 5.45mm TO-247-4.
- Top), 8 pins, pitch.
- PCBs cost >$150; no need to mess.