RARE MULLARD ECC33 6SN7
GREY PLATE , D GETTER
5K3 B7C DATE CODE FROM MARCH 1957
SUPERB TUBE - TESTED VERY STRONG WITH WELL BALANCED TRIODES
TESTED ON MY AVO VCM 163
READINGS -
TUBE 1 - Ia 12.2/12.9 gm 4.3/4.3
100% = Ia - 9.0 gm - 3.8