F124A

Industrial transmitting power triode intended for RF amplification, oscillation, or modulation. Manufacturer data emphasize substantial RF output, professional transmitter operation, and power-handling construction rather than receiving-tube service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 27.2 V / 205.5 A

Description

Federal F-124-A water-cooled power triode for RF amplifier, oscillator and Class B modulator service; 40 kW anode 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: 27.2 V
Nominal heater current: 205.5 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

Amplification factor: 40.5
Max plate voltage: 20000 V
Max plate dissipation: 40000 W
Max grid dissipation: 3000 W
Max cathode current: 7 A

Highest applicable published maximum ratings promoted; service-specific operating points preserved as parameters.

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

Characteristic

Amplification factor
40.5

Other

Maximum plate voltage
20000 V
Maximum plate dissipation
40000 W
Maximum cathode/plate current
7 A
Maximum frequency for full ratings
20 MHz
Typical RF plate voltage
18000 V
Typical RF plate current
6 A
Typical RF output power
80 kW

Capacitance

Grid-plate capacitance
35 pF
Grid-filament capacitance
46 pF
Plate-filament capacitance
5.6 pF

Construction

Cooling method
Water

Data set 02

1962 ITT Industrial and Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

FilamentStartingCurrent
308 A
Peak Cathode Current
35 A
AnodeCoolingMethod
Water
MaximumOperatingFrequency
20 MHz
Maximum Anode Dissipation
40000 W
Absolute maximum / applicable service

Capacitance

GridPlateCapacitance
35 pF
PlateFilamentCapacitance
5.6 pF