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The GM-2B triode is used in electronic current and voltage regulators in RF equipment

Cathode: directly heated, carbonized thoriated tungsten.
Envelope: glass-to-metal.
Cooling: forced air.
Height: at most 167 mm.
Diameter: at most 100 mm.
Mass: at most 2.85 kg


Vibration loads:
frequencies, Hz 20-200
acceleration, m/s² 25
Multiple impacts with acceleration, m/s² 98
Linear loads with acceleration, m/s² 98
Ambient temperature, °C -60 to +70
Relative humidity at up to +25 °C, % 98

Electrical Parameters
Filament voltage, V 6.3
Filament current, A 28-34
Mutual conductance (at anode voltage 4 kV, anode currents 0.7 and 0.5 A), mA/V 14-18
Gain coefficient (at anode voltages 4 and 6 kV, anode current 0.7 A) 48-62
Interelectrode capacitance, pF:
input, at most 25
output, at most 4
transfer, at most 25
Mutual conductance over 1,000 h of service, mA/V, at least 13

Limit Operating Conditions
Filament voltage, V 5.7-6.9
Anode voltage, kV:
at anode dissipation 3.5 kW 5
at anode dissipation 1 kW 8
Grid voltage, V -500
Filament starting current, A 50
Dissipation, W:
anode 3.5x10³
grid 50
Warm up time, s, at least 30

Averaged Anode Characteristic Curves:
Uf = 6.3V;

Averaged Characteristic Curves:
Uf = 6.3V;
_____ anode-grid;
_ _ _ grid