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GU-39B-1

TETRODE

The GU-39B-1 tetrode is used as a power
amplifier in stationary short-wave transmit-
ters

GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: glass-to-metal.
Cooling: forced air.
Height: at most 293 mm.
Diameter: at most 128 mm.
Mass: at most 8 kg

gu-39b-1(1)1.jpg

OPERATING ENVIRONMENTAL CONDITIONS
Ambient temperature, °C 10 to + 55
Relative humidity at up to + 25 °C, % 98

BASIC DATA
Electrical Parameters
Filament voltage, V 63
Filament current, A 85-105
Mutual conductance (at anode voltage 3 kV, grid 2 voltage 1 kV, anode currents 1.5 and 2 A), mA/V 20-28
Gain coefficient (grid 1 -grid 2) (at anode voltage 3 kV, grid 2 voltages 1 and 1.2 kV, anode current 1.5 A) 6-9

Anode current (at anode voltage 3 kV, grid 1 voltage -100 V, grid 2 voltage 1 kV), A, at most 1
Negative bias voltage (at anode voltage 8.5 kV, grid 2 voltage 1.2 kV, anode current 0.5 A), V 140-180
Interelectrode capacitance, pF:
input, at most 80
output, at most 29
transfer,at most 0.7
Output power (at anode voltage 10 kV, operating frequency 30 MHz), kW, at least 13

Limit Operating Values
Filament voltage, V 6-6.6
Anode voltage (DC), kV 10
Negative grid 1 voltage, V 800
Grid 2 voltage (DC), kV 2
Filament starting current, A 150
Dissipation, W:
anode 8x10³
grid 2 450
grid 1 200
Operating frequency at output power at least 13kW, MHz 30
Cutoff frequency, MHz 100
Anode temperature, °C 200
Temperature at envelope, stem and seals, °C 150

gu-39b-1(2)1.jpg
Averaged Anode Characteristic Curves:
Uf = 6.3V; Ug2 = 1kV

gu-39b-1(2)2.jpg
Averaged Anode Characteristic Curves:
Uf = 6.3V; Ug2 = 1.5kV

gu-39b-1(3)1.jpg
Averaged Anode-Grid Characteristic Curves:
Uf = 6.3V; Ug2 = 1kV

gu-39b-1(3)2.jpg
Averaged Anode-Grid Characteristic Curves:
Uf = 6.3V; Ug2 = 1.5kV

gu-39b-1(3)3.jpg
Averaged Characteristic Curves:
Uf = 6.3V; Ug2 = 1kV;
_____ grid 1-anode;
_ _ _ grid 2-anode

gu-39b-1(3)4.jpg
Averaged Grid 1 Characteristic Curves:
Uf = 6.3V; Ug2 = 1kV

gu-39b-1(3)5.jpg
Averaged Characteristic Curves:
Uf=6.3V;Ug2=1.5kV;
_____ grid 1-anode;
_ _ _ grid 2-anode

gu-39b-1(4)1.jpg
Averaged Grid 1 Characteristic Curves:
Uf = 6.3V; Ug2 = 1.5kV

gu-39b-1(4)2.jpg
Averaged Grid 2 Characteristic Curves:
Uf = 6.3V; Ug2 = 1kV

gu-39b-1(4)3.jpg
Averaged Grid 2 Characteristic Curves:
Uf = 6.3V; Ug2 = 1.5kV