The amplifiers that made electric guitar — as clean KiCad schematics, simulation-verified netlists, and structured metadata, built in the open. No scans, no mystery: every circuit redrawn from the underlying facts and checked against its published voltage chart in CI. Free forever, CC-BY-SA. New here? Start with what this is, what it proves, and how to contribute.
The tweed canon and the first British circuits are here — blackface and beyond to follow. contributions welcome.