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GU-46

PENTODE

The GU-46 pentode is used in separately- or self-excited oscillator circuits at up to 60 MHz and as linear power amplifiers in RF transmitters

GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: glass.
Height: at most 230 mm.
Diameter: at most 140 mm.
Mass: at most 900 g

gu-46(1)1.jpg

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

BASIC DATA
Electrical Parameters
Filament voltage, V 8.3
Filament current, A 13.5-16
Mutual conductance (at anode voltage 1 kV, grid 2 voltage 600 V, grid 1 voltage change ±5 V, anode current 500 mA), mA/V 7.5-11.5
Gain coefficient (grid 1 -grid 2) (at anode voltage 1 kV, grid 2 voltage 500-600 V, anode current 500 mA) 4-6
Bias voltage, V 48-76
Interelectrode capacitance, pF:
input, at most 26-33
output, at most 6.5-11
transfer, at most 0.15
Output power, W, min.:
at anode voltage 2.5 kV, grid 2 voltage 600 V, grid 1 voltage -120 V, anode current 0.48 A, at frequency 60 MHz 700
over 1,000 h of service 600

Limit Operating Values
Filament voltage, V 7.9-8.7
Anode voltage, V 3x10³
Grid 2 voltage, V 650
Filament starting current, A 23
Dissipation, W:
anode 500
grid 3 4
grid 2 45
grid 1 4
Operating frequency, MHz 60
Envelope temperature, °C 300
Temperature at seals, °C 220

gu-46(2)1.jpg
Averaged Anode Characteristic Curves:
Uf = 8.3V; Ug2 = 0.5kV; Ug3 = 0

gu-46(2)2.jpg
Averaged Anode Characteristic Curves:
Uf = 8.3 V; Ug2 = 0.6kV; Ug3 = 0

gu-46(3)1.jpg
Averaged Grid 2-Anode Characteristic Curves:
Uf = 8.3V; Ug2 = 0.5kV; Ug3 = 0

gu-46(3)2.jpg
Averaged Grid 2-Anode Characteristic Curves:
Uf = 8.3V; Ug2 = 0.6kV; Ug3 = 0

gu-46(3)3.jpg
Averaged Grid 1-Anode Characteristic Curves:
Uf = 8.3 V; Ug3 = 0
_____ at Ug2 = 0.6kV;
_ _ _ at Ug2 = 0.5kV

gu-46(3)4.jpg
Averaged Characteristic Curves:
Uf = 8.3V; Ug2 = 1 kV; Ug3 = 0;
_____ anode;
_ _ _ grid