Retired Man Constructed a Soviet-Period Supercomputer in His Spare Room

Walk into Mike’s spare room and your senses register one thing’s unsuitable. It’s heat. It smells like scorching steel and outdated glass. Along the wall, 460 Soviet vacuum tubes glow amber throughout 46 hand-built disco-era devices PCBs. A fireplace extinguisher sits close by. This isn’t ambient lighting or a steampunk artwork set up. It’s a functioning 8-bit computer — and it takes 10 to fifteen minutes simply to get up.

Cold War Surplus, Von Neumann Architecture

How NOR gates, recycled triodes, and Apollo-era logic grew to become a working residence pc.

Mike — a retired UK builder recognized solely by first identify — sourced his 6N3P double-triode tubes cheaply from Eastern Europe. Each tube turns into a single NOR gate. Five NOR gates construct a flip-flop. Flip-flops construct registers. Registers construct a pc. Hackaday notes the resulting block diagram would look immediately acquainted to anybody who’s cracked open a Seventies microcomputer textbook — simply applied in glowing glass. NASA used this identical NOR-gate strategy within the Apollo steering computer systems. Mike used it in his spare room.

The specs, stripped naked:

• 460 Soviet 6N3P dual-triodes = 920 thermionic triodes complete
• 46 tube modules throughout 5 backplane PCBs, mounted on acrylic
• 8-bit von Neumann architecture with 16 machine-code directions
• Capable of 16-bit arithmetic; demonstrated a 64-bit Fibonacci sequence generator
• Output: a mechanical flip-digit show salvaged from a British Rail station clock

An Airship Simulator That Requires Imagination

The flagship demo runs on rescued historical past — and calls for you meet it midway.

Building with 75-year-old Soviet {hardware} isn’t romantic. The tubes have been rated for roughly 500 hours new, however these arrived used and saved for 50-plus years. As Mike told The Register: “In many cases the theory did not accurately match the practice.” He constructed a devoted check rig simply to seek out part ranges that labored throughout most tubes. This is his third such machine. The earlier one “went BANG twice.” He describes tube computing as “an addiction.” The machine smells prefer it’s operating.

The flagship demo is a flight simulator for the British R80 airship — managing ballast, gasoline launch, rudder, engine energy, and mooring gear. Output arrives by way of that salvaged British Rail flip-digit show, able to displaying numbers as much as 99,999. No graphics. Mike acknowledges customers want “a bit of vision” to image themselves on the helm. The machine was, in his phrases, “designed to show itself working at the most fundamental level of computing.” It isn’t competing with something trendy — it’s making pc issues seen.

Mike’s inspiration was a go to to Colossus at Bletchley Park. That single afternoon produced three machines, a step-ladder for upkeep, and a spare room stuffed with glowing Soviet glass. Computing, earlier than it vanished right into a chip the scale of a fingernail, seemed precisely like this.