ECC83 pair Brimar by the Brimar Valve works, Footscray Kent (V399 / 402)

Description

Pair of Brimar ECC88 twin triodes, made by the Brimar Valve works, Footscray Kent.

This Brimar ECC83 pair is produced by Brimar in their Footscray factory in the UK. The tubes have a silver post halo getter and grey plates. The screen print is nice and the etched code is under the Brimar print and therefore not completely readable. See pictures. This tubes are in excellent condition and tests NOS.

The tubes are thoroughly tested. The pair is matched very well and both tubes are internally balanced. The specs of the pair match the factory specifications extremely well. See test results.

Sonics

Sonic characteristics of this ECC83 version are:

• Middle area: rich, full and pleasantly warm. Especially voices and electric guitars can get a beautiful natural body. 
• High: supple and rounded, without quickly becoming sharp or clinical. Yet air and detail remain present. 
• Low: rather round and organic than tight and overly accented. 
• Dynamics: sensitive to attack and nuance. Music can get a nice fluid dynamic.
• Harmonic: a pleasant complexity, with a certain depth and texture in the sound. Spatiality: potentially a broad, layered sound image with a natural placement of instruments.

In summary, typical for the this Brimar ECC83 tube is the pronounced vintage character: warm, organic, musical and refined, but with sufficient detail and dynamics

Test results

The tubes have been tested carefully with the official factory test set-up and our sophisticated test equipment. Please read our tube testing page for the ECC83 tube family. The measurement data below show that these tubes are perfectly matched to each other and are internally balanced. And meet the factory specifications of a new/NOS tube very wel. Tube to tube match and internal balance for all tubes is excellent (Gm match < 2%). 

Valve 1 V399

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

1,2/1,2 mA     1,7 /1,7 mA/V OK

=  NOS / NOS =  NOS / NOS

Valve 2 V402

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

1,2/1,2 mA     1,6 /1,7 mA/V OK

=  NOS / NOS =  NOS / NOS

Where NOS is : Ia = 1,1 to 1,4mA, Gm= 1,3 to 1,95 mA/V. 

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

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