Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
Reverse-engineering an unusual IBM modem board from 1965
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The vintage IBM circuit board below has a large metal block on it that caught my attention, so I investigated it in detail. It turns out t...
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Reverse-engineering a vintage power supply chip from die photos
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I recently did a PC power supply teardown so I figured it would be interesting to go deeper and see what happens inside the power supply...
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Inside a 20-Watt Traveling Wave Tube Amplifier from Apollo
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How did the Apollo astronauts communicate on their trip to the Moon, 240,000 miles back to Earth? They used a 32-pound amplifier, built ar...
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