6P3S is Output beam tetrode. Russian output beam tetrode 6P3S is quality equivalent of the 6L6 6L6GT 6L6G 5881 Tube is tested with professional tube Tester L3-3. 100 % in norm. Vf = 6.3 V, Va = 250 V, Vg1 = -14 V, Vg2 = 250 V, Ia = (58 - 90) mA.
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