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Russian phone dialler using interesting magnetic memory tech
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⬐ AnimatsThat's a mini version of a piece of telephone central office equipment called a Dimond ring translator.[1] From 1945. ROM, the early days.[1] http://etler.com/docs/Crossbar/articles/30-AMATranslator.pdf
⬐ timonokoThese weird mega-jumbo magnetic rings were standard issue in Russian military equipment. That is how you stored parameters in the tube-based missile controller I was fiddling with while in Finnish Army in 1970s.⬐ userbinatorSpoiler alert: https://en.wikipedia.org/wiki/Core_rope_memory⬐ ta988Unfortunately it doesn't explain how it works.⬐ ggeorgovassilisIt doesn't :( I'm tempted to edit the article and add an explanation but it'll be slashed as "original research". OP's video explains the concept well however.