In article , bitrex wrote:
I have an number of Raytheon-branded tubes e.g. 6201, an industrial
12AT7, and another numerical-tube starting with 6, some 12Axx-type for
computer use that I'm blanking on the number of.

Do you know if Raytheon produced these in-house or were they second-sourced?

Check the EIA Code:
https://www.vivatubes.com/identifyin...-and-eia-code/
https://www.tubemuseum.org/SearchResults.asp?Cat=30

Sceptre
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