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Old 20th Apr 2020, 12:57 pm   #2
TonyDuell
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Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 4,316
Default Re: IBM 5100 Power supply old transistor ID?

It probably is a transistor, but I've come across TO3 packaged devices in old computer power supplies (DEC in my case) which are double diodes, anodes to the 2 pins and common cathode to the case. Used as a biphase rectifier in the obvious way.
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