Check the listing for details. 2 pcs 6N9S 195x years MELZ Metal Base (6SL7 6Н9С / 1579) Double triode. Tested. Condition: Used. Listed at 98.00 USD. 6N9SDouble triode with separate cathodes of indirect heating in a glass shell with an octal base.Designed to amplify low frequency voltage.The 6N9S double triode is used in preliminary low-frequency amplification stages, phase inverter stages and in measuring equipment.Indirectly heated oxide cathode.Works in any position.Produced in glass design.Socle 8-pin octal with a key.Overall dimensions of the double triode 6N9S:- lamp height - 85 mm; - lamp diameter - 33 mm.Weight no more than 34 g.Operating time not less than 1500 hours.Foreign analogues of the 6N9S lamp: 6SL7GT, 6SL7GTA, 6SL7GTY, 6SL7GTL, ECC35, 6113, 6188.Deciphering the marking of a double triode:6Н9С6 - a number indicating the rounded value of the lamp filament voltage in volts;H - a letter that determines the type of lamp: H - double triode;9 - the number of the serial number of the development of this type of lamp;C - a letter characterizing the structural design: C - a lamp in a glass shell, with or without a base, with a bulb diameter of more than 22.5 mm. Technical characteristics and electrical parameters of the lamp 6N9S:• Filament voltage 6.3 ±0.6 V• Glow current 300 ±25 mA• Nominal anode voltage 250 V• Anode voltage limit 275 V• Nominal grid voltage -2 V• Anode current 2.3 ±0.9 mA• The highest power dissipated at the anode 1.1 W• Maximum voltage between cathode and heater 100 V• Maximum leakage current between cathode and heater 20 ?A• Slope 1.6 ±0.4 mA/V• Internal resistance 44 kOhm• Gain 70 ±15• The highest resistance in the circuit of the first grid 500 kOhm• Input capacitance of the first triode 3 pF• Input capacitance of the second triode 3.4 pF• Output capacitance of the first triode 3.8 pF• Output capacitance of the second triode 3.2 pF• Glass design with octal base