460 vintage 6N3P vacuum tubes from the 1950s and 1960s power Mike’s Tube Computer MK3, a working 8-bit machine built from 46 modules across a 190 by 130 cm panel. It uses 920 triodes wired into NOR logic and runs a 16-instruction set after a 15-minute warm-up, trading practicality for a visible, hands-on view of […]…