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Questions about tubes and gear that glows. FAQ

No, they are GE made...

the markings on the tubes you show are clearly General Electric manufacture.

It's doubtful Westinghouse ever made a 12AU7 themselves, almost all post-1950 Westinghouse tubes are rebrands.

As to the tubes in the first post - they are clearly not Siemens, I would agree the markings look the same as the ones you picture - so likely GE made, 1950's - not the greatest, but not too shabby either.


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