F3X2500F3

Federal forced-air-cooled thoriated-tungsten power triode for industrial and communications RF amplification, oscillation, and modulation. Approximately 2.5 kW plate dissipation and multi-kilovolt operation provide substantial professional transmitter power.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 7.5 V / 51 A

Description

Federal F-3X2500F3 forced-air-cooled industrial and communications power triode for RF amplifier, oscillator and modulator service; 2.5 kW dissipation.

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: 7.5 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

Transconductance: 0.02 S
Amplification factor: 20
Max plate voltage: 6000 V
Max plate dissipation: 2500 W
Max grid dissipation: 78 W
Max cathode current: 4 A

Applicable promoted fields mapped from printed headings; specialized microwave/imaging/electrode data retained densely in TUBE_SECTION_PARAMETER.

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

Filament Starting Current
100 A
Grid-Plate Capacitance
20 pF
Grid-Filament Capacitance
36 pF
Plate-Filament Capacitance
1.2 pF
RF Frequency Full Rating Maximum
30 MHz
Anode Airflow Minimum
120 cfm
Maximum Glass Temperature
150 C
Class B Plate Voltage Maximum
6000 V
Class B Plate Current Maximum
2.5 A
Grid Dissipation Maximum
78 W
Typical Plate Input
7250 W

Data set 02

1962 ITT Industrial and Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

FilamentStartingCurrent
100 A
AnodeCoolingMethod
Forced Air
MaximumOperatingFrequency
30 MHz
Maximum Anode Dissipation
2500 W
Absolute maximum / applicable service