Tubes? I saw one once in a museum I think.
Think about ENIAC (
Electronic Numerical Integrator And Computer).
ENIAC contained 17,468
vacuum tubes, 7,200 crystal
diodes, 1,500
relays, 70,000
resistors, 10,000
capacitors and around 5 million hand-
soldered joints. It weighed more than 30
short tons (27 t), was roughly 8 by 3 by 100 feet (2.4 m × 0.9 m × 30 m), took up 1800 square feet (167 m2), and consumed 150
kW of power. Just imagine heating 17,468 vacuum tubes, think about the power consumed by the filaments alone. When I taught at a Navy school in San Diego it was common practice on a cold morning to fire up all the scopes (Tektronix 545B Models) and HP 524 Counters just to get some heat in the classroom.
Ron