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GU-53A

TETRODE

The GU-53A tetrode is used as a power amplifier in RF equipment and automobile parking stations, including single-sideband transmitters

GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: metal-ceramic.
Cooling: forced (water for anode, air
for stem, envelope and seals).
Height: at most 472 mm.
Diameter: at most 210 mm.
Mass: at most 20 kg

gu-53a1.jpg
K1, K2 - cathode; C1 - grid 1; C2 - grid 2; A - anode; I - contact surfaces

OPERATING ENVIRONMENTAL CONDITIONS
Ambient temperature, °C -10 to +55
Relative humidity at up to +40 °C, % 98

BASIC DATA
Electrical Parameters
Filament voltage, V 14
Filament current, A 230-260
Mutual conductance (at anode voltage 1.4 kV, grid 2 voltage 1 kV, anode currents 7 and 11 A), mA/V 110-140
Gain coefficient (grid 1-grid 2) (at anode voltage 1.4 kV, grid 2 voltages 1 and 1.2 kV, anode current 7 A) 7-10
Anode current at zero grid 1 voltage (at anode voltage 2 kV, grid 2 peak voltage 1.5 kV), A, at least 16
Interelectrode capacitance, pF:
input, at most 470
output, at most 75
transfer, at most 5
Negative cutoff voltage (at anode voltage 10 kV, grid 2 voltage 1.5 kV, anode current 0.5 A), V, at most 350

Limit Operating Values
Filament voltage, V 13-14.5
Anode voltage (DC), kV 12
Negative grid 1 voltage, absolute value. kV 1.5
Grid 2 voltage (DC), kV 1.8
Filament starting current, A 360
Dissipation, kW:
anode 50
grid 2 1.8
grid 1 1.0
Operating frequency, MHz 75
Temperature at ceramic parts and seals, °C 200

gu-53a(2)1.jpg
Averaged Characteristic Curves:
Uf = 14V; Ug2 = 1.5kV;
_____ anode;
_ _ _ grid-anode;
- . - Pa max

gu-53a(2)2.jpg
Averaged Characteristic Curves:
Uf = 14V; Ug2 = 1.75kV;
_____ anode;
_ _ _ grid-anode;
- . - Pa max

gu-53a(3)1.jpg
Averaged Characteristic Curves:
Uf = 14V; Ug2 = 2kV;
_____ anode;
_ _ _ grid-anode;
- . - Pa max

gu-53a(3)2.jpg
Averaged Characteristic Curves:
Uf = 14V; Ug2 = 1.5kV;
_____ anode-grid;
_ _ _ grid 1;
- . - grid 2

gu-53a(3)3.jpg
Averaged Characteristic Curves:
Uf = 14V; Ug2 = 1.75kV;
_____ anode-grid;
_ _ _ grid 1;
- . - grid 2

gu-53a(3)4.jpg
Averaged Characteristic Curves:
Uf = 14V; Ug2 = 2kV;
_____ anode-grid;
_ _ _ grid 1;
- . - grid 2