Mazda AC/SG

AC/SG - Mazda pentode with oxide coated indirectly heated cathode. 4 volt, 1 A filament. Maximum anode voltage 200, screen 80 V, grid bias -1 volts. Anode current 3.4 mA, screen 1.2 mA, ra 350 kOhms, gm 3.2 mA/V. B5 base plus top cap. Equivalents S4VA, MS4B.