Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
Showing posts with label
electronics
.
Show all posts
Showing posts with label
electronics
.
Show all posts
Repairing the card reader for a 1960s mainframe: cams, relays and a clutch
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I recently helped repair the card reader for the Computer History Museum's vintage IBM 1401 mainframe. In the process, I learned a lot ...
7 comments:
IBM mainframe tube module part II: Powering up and using a 1950s key debouncer
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In the 1950s, before integrated circuits or even transistors, mainframe computers were built from thousands of power-hungry vacuum tubes fil...
5 comments:
An 8-tube module from a 1954 IBM mainframe examined: it's a key debouncer
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IBM's vacuum tube computers of the 1950s were built from pluggable modules, each holding eight tubes and the associated components. I re...
15 comments:
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