A tube-preamp character from four BS170s, a 17 V rail doubled from 9 V, trimpot-free bias, a Marshall tone stack and all through-hole parts: the circuit, the board and the road to Rev 2.2 of BEY-HAN Overdrive.
$ ls tags/pcb
#pcb
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A faithful Rust port of Freerouting: byte-identical results to Java, five times the speed and far less memory, long-standing bugs fixed, a live view, length matching, differential pairs, controlled impedance and a KiCad plugin. Measurements and screenshots from real runs.