IBM vacuum tubes
Nigel Johnson
nw.johnson at ieee.org
Mon Jun 22 06:58:21 CDT 2020
An electronic parrot in the vacuum tube days? -- must have been very large!
On 22/06/2020 07:56, William Donzelli via cctalk wrote:
>> Thanks! What is the secret decoder ring that tells you 188 means GE?
> EIA manufacturer codes. These were often applied to private and house
> branded labelled tubes. Other numbers are 274 for RCA, 280 for
> Raytheon, 158 for DuMont, and so forth.
>
> EIA codes were used for non-tube electronic parrots.
>
> --
> Will
--
Nigel Johnson
MSc., MIEEE, MCSE
VE3ID/G4AJQ/VA3MCU
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