Labels Milestones
Back| R21, R22, R23 | 3 | A1M | \*\*Potentiometer, 9 mm or 16 mm vertical board mount OR: | | Screws and spacers (see [build notes](build.md)) | | | R30 | 1 | TL074 | Quad operational amplifier, DIP-14"/>
| R21, R22, R23 | 3 | A1M | \*\*Potentiometer, 9 mm or 16 mm vertical board mount OR: | | Screws and spacers (see [build notes](build.md)) | | | R30 | 1 | TL074 | Quad operational amplifier, DIP-14"/>