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A comment on Glowing mercury thyratrons: inside a 1940s Teletype switching power supply.
https://youtu.be/k15pWPBNAUE?t=45s
https://www.garagejournal.com/forum/showthread.php?t=264474
These were made from 1939 through at least the 1990s, although the vacuum tubes went away in the mid-1980s. Amazingly long-lived product.
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https://youtu.be/k15pWPBNAUE?t=45s
https://www.garagejournal.com/forum/showthread.php?t=264474
These were made from 1939 through at least the 1990s, although the vacuum tubes went away in the mid-1980s. Amazingly long-lived product.