IBM vacuum tubes

William Donzelli wdonzelli at
Wed Jun 17 12:24:56 CDT 2020

> Ah, good ol' 5965s.
> These were a higher-spec version of ... some really common tube which I
> no longer remember.  The Bendix G-15 was wholly based on them.

5965 is a computer rated 12AV7 with better balanced cutoff
characteristics, but generally worse for noise.

About 15 percent of the tubes in a G15 are 6197s, which are computer
rated 6CL6s.


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