12AT7 BRIMAR RED PRINT  MATCHED PAIR OF HIGH GRADE ECC81
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12AT7 BRIMAR RED PRINT  MATCHED PAIR OF HIGH GRADE ECC81 12AT7 BRIMAR RED PRINT  MATCHED PAIR OF HIGH GRADE ECC81 12AT7 BRIMAR RED PRINT  MATCHED PAIR OF HIGH GRADE ECC81

12AT7 BRIMAR RED PRINT MATCHED PAIR OF HIGH GRADE ECC81

  • £65.00

Only 1 left!

On offer today is a pair of Brimar Red print 12AT7 twin triodes.   Carrying good red print, these test as excellentusing my AVO Valve Characteristic Meter VCM163 with the following results: At Va = 250V Vg = -2.0V 

U15: Section 1: Ia = 9.5 mA; gm = 5.1 mA/V

U15: Section 2: Ia = 10 mA; gm = 5.1 mA/V

 

U16: Section 1: Ia = 9.0 mA; gm = 5.1 mA/V

U16: Section 2: Ia = 9.2 mA; gm = 5.2 mA/V

 

The specification for a new/100% emission valve is:

Ia = 10mA; gm = 5.5mA/V

As you can see, this result show a really  strong matched pair of valves with good matching of each triode section within each envelope.


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