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GU-48

TRIODE

The GU-48 triode is designed for use in RF electroheating installations

GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: glass, no-base.
Height: at most 230 mm.
Diameter: at most 115 mm.
Mass: at most 850 g

OPERATING ENVIRONMENTAL CONDITIONS

Ambient temperature, °C -10 to +55

Relative humidity at up to +25 °C, % 98

BASIC DATA
Electrical Parameters

Filament voltage, V 10

Filament current, A 9.2-10.8

Gain coefficient (at anode voltage 2-1.2 kV, anode current 200 mA) 29-41

Anode current, mA:

at anode voltage 2.5 kV and grid voltage -50V 60-200

at anode voltage 100 V and grid voltage 100 V 500-900

Interelectrode capacitance, pF:

input 11-15

output 9-13

transfer 5.5-8

Output power (at anode voltage 2.5 kV, operating frequency 35-40 MHz), W, at least 700

Output power over 1,000 h of service, W, at least 550

Limit Operating Conditions

Filament voltage, V 9.5-10.5

Anode voltage, kV 3

Filament starting current, A 15

Anode dissipation, W 300

Operating frequency, MHz 75

Envelope temperature, °C 270

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

BASIC DATA Electrical Parameters
Filament voltage, V	10
Filament current, A	9.2-10.8
Gain coefficient (at anode voltage 2-1.2 kV, anode current 200 mA)	29-41
Anode current, mA:
at anode voltage 2.5 kV and grid voltage -50V	60-200
at anode voltage 100 V and grid voltage 100 V	500-900
Interelectrode capacitance, pF:
input	11-15
output	9-13
transfer	5.5-8
Output power (at anode voltage 2.5 kV, operating frequency 35-40 MHz), W, at least	700
Output power over 1,000 h of service, W, at least	550

Limit Operating Conditions
Filament voltage, V	9.5-10.5
Anode voltage, kV	3
Filament starting current, A	15
Anode dissipation, W	300
Operating frequency, MHz	75
Envelope temperature, °C	270