GU-56

TRIODE

The GU-56 triode is used as an oscillator and a power amplifier in stationary industrial RF heating generators and other RF equipment at frequencies up to 45 MHz

GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: glass-to-metal.
Height: at most 280 mm.
Diameter: at most 161 mm.
Mass: at most 4 kg

BASIC DATA Electrical Parameters
Filament voltage, V	6.3
Filament current, A	21.5-26.5
Mutual conductance (at anode voltage 300 V, anode currents 1.5 and 1 A), mA/V	6-10
Gain coefficient (at anode voltages 300 and 1,000 V and anode current 1 A)	11-19
Anode current (at anode voltage 300 V and grid voltage 250 V), A, at least	1.5
Cutoff voltage (at anode voltage 3 kV and anode current 0.1 A), V, at most	-150
Interelectrode capacitance, pF:
input, at most	30
output, at most	20
transfer, at most	0.8

Limit Operating Values
Filament voltage, V	6-6.6
Anode voltage, V	3.5
Dissipation, W:
anode	700
grid	200
Operating frequency, MHz	45
Anode temperature, °C	250
Temperature at glass parts and seals, °C	150

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

Averaged Anode Characteristic Curves:
U_f = 6.3V;
— . — P_{a max}

Averaged Grid-Anode Characteristic Curves:
U_f = 6.3V

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