Who made this Telefunken labeled 12AX7?

Tubes Asylum

Questions about tubes and gear that glows. FAQ

Doesn't have a diamond. Has a round recessed area on bottom.
Doesn't have as wide of an indentation of the getter ring into the support post.
Has codes in the bottom edge I'm not familiar with.
First code on the bottom line looks like a @.
Has four well defined seams on top.
EI?

Your interest may vary but the results will be same. (Byrd 2020)

I can't compete with the dead. (Buck W. 2010)

Cowards can't be heroes. (Byrd 2017)

Why don't catfish have kittens? (Moe Howard 1937)

Edits: 03/03/24

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Topic - Who made this Telefunken labeled 12AX7? - Byrd69 19:50:41 03/03/24 (10)

Probably a better tube than the Telefunken anyway. nt - Sondek 13:33:24 03/05/24 (7)

RE: Probably a better tube than the Telefunken anyway. nt - dgaapc7 03:55:56 03/06/24 (2)

Testing and selection? - Sondek 09:20:29 03/06/24 (0)

totally agree - Story 04:31:02 03/06/24 (0)

Love Ei - Jon L 16:41:58 03/05/24 (1)

I have a few of those tubes - Tre' 14:49:05 03/07/24 (0)

Went through my box of fakes - Byrd69 16:41:06 03/05/24 (1)

RE: Went through my box of fakes - Sondek 16:44:36 03/05/24 (0)

Ei - Yugoslavia - opalize 16:22:06 03/04/24 (0)

RE: Who made this Telefunken labeled 12AX7? - Tom Bavis 08:27:00 03/04/24 (0)

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