GU-88A

TRIODE

The GU-88A triode is a RF oscillator and power amplifier tube for use in stationary general-purpose RF equipment.

GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: metal-ceramic.
Cooling: water for anode, forced air for envelope other elements.
Height: at most 764 mm.
Diameter: at most 215 mm.
Mass: at most 33 kg.

K1, K2 - cathode; C - grid; A - anode

BASIC DATA Electrical Parameters
Filament voltage (AC or DC), V	26
Filament current, A	640-720
Output power at frequencies up to 22 MHz, kW, at least	500
Mutual conductance (at anode voltage 1 kV, peak grid voltages 200 and 600 V), mA/V	380-620
Cathode emission current, A, at least	500
Static amplification factor (at anode voltages 1 and 2 kV, anode current 10 A)	36-54
Interelectrode capacitance, pF:
grid-anode, at most	200
grid-cathode, at most	500
anode-cathode, at most	7.5

Limit Operating Values
Filament voltage (AC or DC), V	24-26
Filament starting current (peak value), A	1,150
Anode voltage (DC), kV	12
Negative bias voltage, absolute value, V	500
Dissipation, kW:
anode	400
grid	7
Operating frequency, MHz	30
Envelope temperature at hottest point (except for anode), °C	175

Averaged Characteristic Curves:
_____ anode-grid;
_ _ _ grid

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