CV4004, MILITARY SPEC, ECC83, BRIMAR ROCHESTER MANUFACTURED OCT 1974
CV4004, MILITARY SPEC, ECC83, BRIMAR ROCHESTER MANUFACTURED OCT 1974
On offer today we have a Brimar white print CV4004 made at the Rochester plant and carrying a date code for Oct 1974.
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 follwing results were obtained:-
A1 Ia = 1.2 mA gm = 1.6 mA/V
A2 Ia = 1.1 mA gm = 1.5 mA/V
As you can appreciate this represents good matching of each triode section within the envelope and a device showing superb emission.
