6N9S Reflector (6SL7 1579 6SU7) Double triode NEW Lot for matched pair. Radio tube 6N9S double triode - used to amplify low frequency voltage. Design - in a glass shell, with an octal base. Main technical characteristics Filament voltage 6.3 ±0.6 V Filament current 300 ±25 mA Nominal anode voltage 250 V Anode voltage limit 275 V Grid voltage nominal -2 V Anode current 2.3 ±0.9 mA Maximum power dissipated at the anode 1.1 W The highest voltage between the cathode and the heater is 100 V Maximum leakage current between cathode and heater 20 μA Slope 1.6 ±0.4 mA/V Internal resistance 44 kOhm Gain 70 ±15 The highest resistance in the first grid circuit is 500 kOhm The input capacitance of the first triode is 3 pF Input capacitance of the second triode is 3.4 pF Output capacitance of the first triode 3.8 pF Output capacitance of the second triode 3.2 pF Weight 50 g