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RE: 12AU7 India Identification

Posted by unclestu (D) on February 25, 2015 at 17:54:20

In Reply to: 12AU7 India Identification posted by Zedguy on February 25, 2015 at 17:38:50:

Check out the various websites with philips factory codes.

I dimly recall the India made 12XX series, but were relatively uncommon in the west. IIRC, top eetched line was tube type, second line was the factory and date code. I'm sitting a relatively full box of 12AX7's labeled India but the etched codes mark it as Yugoslavian. EAsy to date because the postage is on the packing (early 60's, way pre war, when Yugos were very well made).

IIRC true India tubes were favored by many ARC preamp users (SP-3/6) in the day. The Philips Barat factory code was V, BTW Those old Indias supposed had a very respectible midrange

Edits: 02/25/15

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