16 Jun
2020
16 Jun
'20
7:58 a.m.
On Mon, 2020-06-15 at 10:24 -0400, William Donzelli wrote:
Good question. They have an IBM logo and "Made in USA", along with the
part number (5965 or 5963) and a bunch of numbers that might give a hint
as to manufacturer. Any suggestions on how to decode them?
These came to me from my father, who worked in the Vacuum Tubes
department at GE for a while when I was growing up, so there's a good
chance the OEM was GE.
While going
through my assortment of old vacuum tubes looking for audio
treasures, I found a handful of IBM branded ones. Mostly 5965, but
there's one 5963 mixed in.
Who made them?