CV455, MULLARD MIL SPEC ECC81, NOVEMBER 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, testing as good using my AVO Valve Characteristic Meter VCM163 with the following results: At Va = 250V Vg = -2.0V
V1: Section 1: Ia = 13.0 mA; gm = 5.5 mA/V
V1: Section 2: Ia = 14.0 mA; gm = 5.8 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.
