ECC81 / 12AT7 Brimar 1954 ! black plates (V134)

Beschrijving

Early 12AT7 / ECC81; made in by Brimar, UK

This is a 12AT7 / ECC81 produced by Brimar UK in 1954. The tube has a bended wire-getter and copper grid posts, see pictures.The screen print is nice and the etched code is clearly visible. The tube shows no signs of use and is most likely NOS. See pictures. The early Brimar is highly regarded. Very healthy Tube with matching systems; see test results.

Sonics

The acoustic properties of the black plate ECC81 (Brimar production) are outstanding and widely known. Excellent preamp valve, low noise, very smooth extended highs, very good in phono stages. Balanced and warm/smooth sounding with liquid midrange.

Recommended, together with the Telefunken ECC801S, for use in the Aqua la Scala MklI ! I refer to the threads on the web for more information.

Test results*

Tube test NOS. The internal balance between the triode sections is excellent; see test results

For test methods and factory specification read the tube testing page.

Valve V116

Ia (plate current): Transconductance (Gm): Gas test, Shorts test:

9,2 / 9,3  mA     5,6 /5,5 mA/V OK

=  NOS / NOS =  NOS / NOS

Where NOS is : Ia = 7 to 14 mA, Gm= 4,5 to 6,5 mA/V.

*  For test methods and factory specification read the tube testing page.

Short description