Questions tagged [vacuum-tube]

Vacuum-tube computing, i.e. the use of vacuum tubes (also known as valves) as logic devices. Questions about cathode ray tubes should use the [crt-monitor] tag instead.

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Why were relays prevalent in early 1940s computers when vacuum tubes were also available?

Many of of the computers built in the 1940s used relays for logic (see here and here): Bell Labs Model I, 1940 Bletchley Park Bombe, 1940 Zuse Z2, 1940 Zuse Z3, 1941 Bell Labs Model II, 1943 Bell ...
12
votes
7answers
2k views

Can I build a working(ish) vacuum tube byte?

This is a somewhat odd question. I teach a course on media history, and spend some time talking about digital data towards the end. I am interested in building a device to illustrate some basic ideas ...
4
votes
2answers
270 views

How many 6SN7 tubes did it take to store a bit?

One of the most important components of a computer is a circuit called a flip-flop, which has two stable states (that it can flip-flop between, hence the name); it is used for temporary storage of a ...
7
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4answers
665 views

Have there been any studies comparing the reliability of relay versus vacuum tube computers?

Computers of the first half of the 20th century generally used relays or vacuum tubes as their logic elements. Each of these components has there own methods of failure, but relays and tubes have a ...