IBM mainframe tube module part II: Powering up and using a 1950s key debouncer


Here’s an interesting two-part series of posts by Ken Shirriff detailing the IBM mainframe tube module.

Part 1 discuss the tube modules and describe the IBM 705 that used this module. Part 2 covers powering up the module and getting it to work.

Read the full post at Ken Shirriff’ blog.

from Dangerous Prototypes