GU-66A

TRIODE

The GU-66A triode is used for power amplification at up to 30 MHz in grounded-grid or grounded-cathode circuits in stationary RF transmitters.

GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: metal-ceramic with ring leads of cathode and grid.
Cooling: forced (water for anode, air for stem).
Height: at most 420 mm.
Diameter: at most 183 mm.
Mass: at most 16 kg.

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

BASIC DATA Electrical Parameters
Filament voltage (AC or DC), V	13.5
Filament current, A	200-250
Negative cutoff voltage (at anode voltage 10 kV, anode current 0.1 A), absolute value, V, at most	300
Mutual conductance (at anode voltage 2 kV, anode currents 6 and 12 A), mA/V	95-125
Gain coefficient (at anode voltage 4 kV, anode current 8 A)	39-53
Output power (at anode voltage 10 kV), kW, at least	100
Interelectrode capacitance, pF:
input, at most	160
output, at most	3
transfer, at most	55

Limit Operating Values
Maximum filament voltage (AC or DC), V	14
Filament starting current, A	360
Anode voltage (DC), kV	10
Cutoff voltage (instantaneous value), absolute value, kV	-1.5
Dissipation, kW:
anode	60
grid	1.3
Operating frequency, MHz	30
Temperature at stem and metal-to-ceramic seals, °C	200

Averaged Characteristic Curves:
U_f = 13.5V;
_____ anode-grid;
_ _ _ grid

Averaged Grid-Anode Characteristic Curves:
U_f = 13.5V

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