GU-39A-1

TETRODE

The GU-39A-1 tetrode is used as a power amplifier in stationary short-wave transmitters

GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: glass-to-metal
Cooling: forced (water for anode, air for stem and envelope)
Height: at most 292 mm.
Diameter: at most 128 mm.
Mass: at most 4 kg

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

BASIC DATA Electrical Parameters
Filament voltage, V	6.3
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	1
Negative bias voltage (at anode voltage 8.5 kV, grid 2 voltage 1.2 kV, anode current 0.5 A), V	130-190
Interelectrode capacitance, pF:
input, at most	80
output, at most	29
transfer, at most	0.7
grid 2-cathode, at least	50
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
Operating frequency (limit value), MHz	100
Temperature at envelope, stem and seals, °C	150

Averaged Anode Characteristic Curves:
U_f = 6.3V; U_g2 = 1 kV

Averaged Anode Characteristic Curves:
U_f = 6.3V; U_g2 = 1.5kV

Averaged Anode-Grid Characteristic Curves:
U_f = 6.3V; U_g2 = 1 kV

Averaged Anode-Grid Characteristic Curves:
U_f = 6.3V; U_g2= 1.5kV

Averaged Characteristic Curves:
U_f = 6.3V; U_g2 = 1kV;
_____ grid 1-anode;
- - - grid 2-anode

Averaged Characteristic Curves:
U_f = 6.3V; U_g2 = 1.5kV;
_____ grid 1-anode;
- - - grid 2-anode

Averaged Grid 1 Characteristic Curves:
U_f = 6.3V; U_g2 = 1kV

Averaged Grid 1 Characteristic Curves:
U_f = 6.3V; U_g2 = 1.5kV

Averaged Grid 2 Characteristic Curves:
U_f = 6.3V; U_g2 = 1 kV

Averaged Grid 2 Characteristic Curves:
U_f=6.3V; U_g2 = 1.5kV

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