12AX7, PHILIPS, ECC83, MINIWATT, AUSTRIA MANUFACTURE, 1961
12AX7, PHILIPS, ECC83, MINIWATT, AUSTRIA MANUFACTURE, 1961
On offer today we have a Philips Miniwatt Austria white print 12AX7 made in1961.
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 = 1.8 mA gm = 2.0 mA/V
A2 Ia = 2.0 mA gm = 2.1 mA/V
As you can appreciate this represents good matching of each triode section within the envelope and a device showing superb emission.
