MULLARD OLD SHIELD YELLOW PRINT BLACKBURN ECC83
On offer today we have a Mullard old shield YELLOW print ECC83 made at the Blackburn plant. Using our AVO VCM163 for conditions of or Va = 250 V Vg = -2.0V against a nominal specification of anode current Ia = 1.2 mA and mutual conductance gm = 1.6 mA/V, the following results were obtained:-
A1 Ia = 1.1 mA gm = 1.5 mA/V
A2 Ia = 1.0 mA gm = 1.5 mA/V
As you can appreciate this represents good matching of each triode section within the envelope and an EXCELLENT device.