Before the era of large-scale integration (LSI) semiconductor circuits, discrete logic circuits using the common diode-transistor logic (DTL) were still necessary and available in a format that was ...

[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 to ...