CV455, MULLARD MIL SPEC ECC81, DECEMBER 1953 MITCHAM MANUFACTURE

CV455, MULLARD MIL SPEC ECC81,  DECEMBER 1953 MITCHAM MANUFACTURE

On offer today is a lovely  Mullard CV455 manufactured in  1953    Carrying good white print representations of military cartouche as well as domestic markings this is a real find, testingas goodusing my AVO Valve Characteristic Meter VCM163 with the following results: At Va = 250V Vg = -2.0V 

V1: Section 1: Ia = 15.0 mA; gm = 5.5 mA/V

V1: Section 2: Ia = 15.0 mA; gm = 5.5 mA/V

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

Ia = 10 mA; gm = 5.5 mA/V

As you can see, this result show a strong, well matched triode section within the envelope.