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Gold Aero 12AX7A W. Germany

70.15.220.35
Posted on May 26, 2012 at 17:45:55
bburkard@ptd.net
Audiophile

Posts: 4
Location: Pocono's Pa.
Joined: January 28, 2009
 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.

 

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RE: Interesting, posted on May 28, 2012 at 18:30:20
Neff


 
Gold Aero. We used these in an Aerosmith recording studio with Frank Gould as head audio engineer out of Europe many years ago. The tubes were packaged in a clear plastic tube with grey foam inserts and black end caps. I had no idea Gold Aero was still active grading tubes.

 

RE: Gold Aero 12AX7A W. Germany, posted on May 28, 2012 at 06:53:30
Jack G
Audiophile

Posts: 9740
Joined: September 24, 1999
 If they have the diamond, then they are Teles.
I didn't know Gold Aero was still around. They used to just buy tubes and grade them according to specs, pricing accordingly.
Jack

 

RE: Gold Aero 12AX7A W. Germany, posted on May 28, 2012 at 14:53:09
bburkard@ptd.net
Audiophile

Posts: 4
Location: Pocono's Pa.
Joined: January 28, 2009
 The tubes I found in this pre amp could have been installed 40 years ago as far as I know. I bought the pre amp at least ten years ago, and I think this is the last time I looked inside.

 

RE: Gold Aero 12AX7A W. Germany, posted on May 28, 2012 at 10:12:27
Nunki
Audiophile

Posts: 644
Joined: November 27, 2010
 BTW: can anyone confirm that very early 12AT7/ECC81 TFKs do NOT wear the typical diamond in bottom? i have a couple of those and they look exactly in every way like the <> coined ones.

N.

 

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