12AU7WA / 6189 TELEFUNKEN pair same date <> NIB Holy Grail v193/194



  • Telefunken 12AUWA / ECC802S   
  • NOS
  • same date codes
  • <> bottom
  • super ultra rare!
  • matched with balanced systems

1 in stock


This is a pair of Telefunken 12AU7WA (same as: ECC802S) made in Ulm Germany. I bought these tubes new  several years ago. Please see pictures and test data!

The properties of this tube are legendary and widely known. I refer to the many threads on the web for more information. Telefunken produced a very limited number of these beauties. 

The printed code U8102501p on the glass of both tubes indicates that the tubes were manufactured in 1965 in the ULM plant in Germany. The tubes have the typical plate structure of the Telefunken ECC802S with reinforcement and of course the diamond bottom. The tubes are unused and have NOS test values that match the factory specification  precisely and balanced systems. 

This pair is a real jewel, so please excuse the high price.


Excellent valve, low noise, very smooth extended highs, very good in phono stages. 

12AU7WA / ECC802S: balanced and smooth sounding with liquid midrange, recommended!

Please read our test and shipping policy before buying !

Test method & results

The tubes have been tested carefully with the official Telefunken test set-up and our sophisticated test equipment. Please read our testmethod for the ECC82 tube family.

The measurement results below show that both systems are matched and balanced. And fulfill the factory specs of a new/NOS tube.

Valve 1


Ia (plate current):

Transconductance (Gm):

Gas test, Shorts test:

10,2/10,2 mA    

2,1 / 2,1 mA/V


=  NOS / NOS

=  NOS / NOS


Valve 2


 Ia (plate current):

Transconductance (Gm):

Gas test, Shorts test:

 10,4 / 10,3 mA

2,2 / 2,2 mA/V


=  NOS / NOS

=  NOS / NOS


(Telefunken factory specification see test page)

Summarized description

Tube code:                             12AU7WA diamond bottom

Actual Brand*:                        Telefunken 

Printed Brand:                        Telefunken

Manufactured in:                    Ulm, Germany

Visible Date Codes:               U8102501p

Production date:                    1965

Plate Construction:                reinforced grey plates

Getter Construction:              round halo getter

Print Condition:                      new; see picture

Box included:                         Original Telefunken boxes

Equivalent tubes:                   E82CC, 12Au7, ECC82, 5814A

General test results:              NOS specs

Quantity of Tubes:                 2; one pair


Please study photos carefully; what you see is what you get! Ask any questions before bidding. Thanks



There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.