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A comment on Apollo Guidance Computer switching power supply works after 50 years. Parent comment

Re:Apollo Guidance Computer switching power supply works aft... by convolvatron on Saturday August 24, 2019 @08:08PM (#20790513)
what is the welding process here (for external leads). i've been concerned about tig welding on enclosures with components tied to the frame ground..in fact i'm pretty sure i've destroyed some stuff that way
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Re:Apollo Guidance Computer switching power supply works aft... by userbinator on Sunday August 25, 2019 @01:28AM (#20791516)
Almost certainly resistance welding. It's very fast and passes current only through the two pieces to be welded together, so avoids all the issues of stray currents and the other safety precautions needed with arc welding processes like TIG that generate UV and showers of molten metal.

19:50 in this video shows one in use in making a vacuum tube:

https://www.youtube.com/watch?v=mx3IOlzMKp4

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Re:Apollo Guidance Computer switching power supply works aft... by abakker on Saturday August 24, 2019 @11:25PM (#20791162)
I don’t know, but I’d bet GTAW/TIG. But, if you are careful about ground placement you might be ok. Certainly you can’t just use the table ground
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