2026-07-31 20:20 UTC
@VE2UWY@mastodon.radio Yes, the tube is based on a regular tube (the 6J6), but IBM redesigned it for more reliability. They changed the grid and plate to avoid shorts from tiny conductive particles and split the shared cathode into two separate cathodes. (Source: "IBM's Early Computers", p66)
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@VE2UWY@mastodon.radio 2026-07-31 22:22
@kenshirriff@oldbytes.space OK, cool. I'm sure everyone at IBM was relieved within a few years when transistors started to catch on. :-)