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F631A

Large water-cooled ITT power triode for very-high-power low-frequency service. Approximately 25 kW plate dissipation and very high cathode-current capability suit major transmitter and industrial power systems operating in the lower RF range.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 28 V / 51 A

Description

Three-electrode power tube for radio-frequency power amplifier and oscillator service with a 25 kW water-cooled anode.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: 28 V
Nominal heater current: 51 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Max plate dissipation: 25000 W
Max cathode current: 12.5 A

Published maximum ratings and characteristics audited; remaining numeric data retained densely in parameter table.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1962 ITT

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Published value
25 W
25 Kilowatts Plate Dissipation
The anode is water-cooled, capable of dissipating
25
The anode is water-cooled, capable of dissipating 25
) Filament Voltage
28 V
) Filament Voltage 28 Volts
p Filament Current
51 A
p Filament Current 51 Amperes
p Filament Starting Current
102 A
p Filament Starting Current 102 Amperes
) Peak Cathode Current
12.5 A
) Peak Cathode Current 12.5 Amperes
Grid-Plate
30
Grid-Plate 30 uuf
Grid-Filament
20
Grid-Filament 20 uuf
Plate-Filament
2.7
Plate-Filament 2.7 upf
Water Flow on Anode
10
Water Flow on Anode 10 GPM
Temperature
70
Temperature 70° C
Maximum Glass Temperature
150
Maximum Glass Temperature 150° C
Published value
25 W
25 Kilowatts Plate Dissipation and to the manufacturer.

Data set 02

1962 ITT Industrial and Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum full-rating frequency
3 MHz
Cooling method
water