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Check those Westinghouse 12AX7's

Posted by Kevin at Upscale Audio on January 30, 2000 at 08:06:12:
Tell us what they look like. I would be curious. If they are in a fresh looking light blue box, the tubes you bought may well be some Chinese 12AX7's just like you had in there. There is someone in te U.S. making Westinghouse boxes and selling Chinese EL-34's, a tube marked "5751/12AX7" and a ton of other stuff. I forget the country they mark on them.

Same thing with some RCA tubes that are in white boxes with a stuck on red RCA paper label. I think these may be from the same source.