We have occasionally featured vacuum tube ... to be a CPU. The tubes are arranged in groups of four with heaters in series from a 24 V supply, while the inputs and clock come in the form of ...

[Usagi Electric] is breathtakingly close to having his Bendix G15 vacuum tube computer up and running. This week he is joined by a new friend, [Lloyd] who is restoring a G15 as well. [Lloyd] used ...