Ken Shirriff's blog

Computer history, restoring vintage computers, IC reverse engineering, and whatever

Showing posts with label power supply. Show all posts
Showing posts with label power supply. Show all posts

Repairing a 1960s mainframe: Fixing the IBM 1401's core memory and power supply

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A few weeks ago, I wanted to use one of the vintage IBM 1401 mainframe computers at the Computer History Museum, but the computer wasn't...
20 comments:

Inside the vintage Xerox Alto's display, a tiny lightbulb keeps it working

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In this Alto restoration episode, we repaired a second CRT display, exercising our TV repair skills and discovering a tiny mysterious lightb...
12 comments:

Lacking safety features, cheap MacBook chargers create big sparks

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You might wonder if it's worth spending $79 for a genuine MacBook charger when you can get a charger on eBay for under $15. You should...
4 comments:

Restoring Y Combinator's Xerox Alto, day 1: Power supplies and disk interface

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A few days ago, I wrote about how I'm helping restore a Xerox Alto for Y Combinator. This new post describes the first day of restora...
6 comments:

Fixing the core memory in a vintage IBM 1401 mainframe

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I recently had the chance to help fix one of the vintage IBM 1401 computer systems at the Computer History Museum when its core memory sta...
18 comments:
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