12AX7, MULLARD, ECC83, mC1 B6K, BLACKBURN MANUFACTURED, NOVEMBER 1956
ECC83, MULLARD, mC1 B6K, BLACKBURN MANUFACTURED, NOVEMBER 1956
On offer today we have a Mullard white print 12AX7 / ECC83 made at the BLACKBURN plant and carrying an mC1 coding with a date code for November 1956.
For 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 = 1.6 mA gm = 1.5 mA/V
A2 Ia = 1.4 mA gm = 1.6 mA/V
As you can appreciate this represents good matching of each triode section within the envelope and a device showing superb emission.
We Also Recommend
CV4004, MILITARY SPEC, ECC83, 641, R4D2, MULLARD, BOX ANODE, MITCHAM MANUFACTURED, APRIL 1964
CV4004, MILITARY SPEC, ECC83, BENTLEY BADGED, BOX ANODE, BRIMAR FOOTSCRAY, MANUFACTURED DEC 1960, NEW BOXED