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Gold Aero 12AX7A W. Germany

Posted by bburkard@ptd.net on May 26, 2012 at 17:45:55:
Hi all you audio nuts. I have just opened a Dynaco PasII pre amp, and found Gold Aero tubes marked West Germany. Does anyone know how to identify Telefunken tubes? They do have a diamond in the center on the bottom.