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

K1, K2 - cathode; C1 - grid 1; C2 - grid 2; A - anode; I - contact surfaces

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

Averaged Characteristic Curves:
U_f = 14V; U_g2 = 1.5kV;
_____ anode;
_ _ _ grid-anode;
- . - P_{a max}

Averaged Characteristic Curves:
U_f = 14V; U_g2 = 1.75kV;
_____ anode;
_ _ _ grid-anode;
- . - P_{a max}

Averaged Characteristic Curves:
U_f = 14V; U_g2 = 2kV;
_____ anode;
_ _ _ grid-anode;
- . - P_{a max}

Averaged Characteristic Curves:
U_f = 14V; U_g2 = 1.5kV;
_____ anode-grid;
_ _ _ grid 1;
- . - grid 2

Averaged Characteristic Curves:
U_f = 14V; U_g2 = 1.75kV;
_____ anode-grid;
_ _ _ grid 1;
- . - grid 2

Averaged Characteristic Curves:
U_f = 14V; U_g2 = 2kV;
_____ anode-grid;
_ _ _ grid 1;
- . - grid 2