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

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

Averaged Anode Characteristic Curves:
U_f = 8.3V; U_g2 = 0.5kV; U_g3 = 0

Averaged Anode Characteristic Curves:
U_f = 8.3 V; U_g2 = 0.6kV; U_g3 = 0

Averaged Grid 2-Anode Characteristic Curves:
U_f = 8.3V; U_g2 = 0.5kV; U_g3 = 0

Averaged Grid 2-Anode Characteristic Curves:
U_f = 8.3V; U_g2 = 0.6kV; U_g3 = 0

Averaged Grid 1-Anode Characteristic Curves:
U_f = 8.3 V; U_g3 = 0
_____ at U_g2 = 0.6kV;
_ _ _ at U_g2 = 0.5kV

Averaged Characteristic Curves:
U_f = 8.3V; U_g2 = 1 kV; U_g3 = 0;
_____ anode;
_ _ _ grid

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