F343AA

Forced-air-cooled Federal power triode for RF amplification, oscillation, and Class B modulation. Approximately 5 kW plate dissipation and 18 kV capability emphasize high-voltage transmitter service with air-cooled construction.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 21.5 V / 57.5 A

Description

Federal F-343-AA forced-air-cooled power triode for RF power amplifier, oscillator and Class B modulator service; 5 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: 21.5 V
Nominal heater current: 57.5 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
Max plate voltage: 18000 V
Max plate dissipation: 5000 W
Max cathode current: 8 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
115 A
Peak Cathode Current
8 A
Grid-Plate Capacitance
23.5 pF
Grid-Filament Capacitance
16.6 pF
Plate-Filament Capacitance
1.9 pF
RF Frequency Full Rating Maximum
4 MHz
Required Anode Airflow
600 cfm

Data set 02

1962 ITT Industrial and Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

FilamentStartingCurrent
115 A
Peak Cathode Current
8 A
AnodeCoolingMethod
Forced Air
MaximumOperatingFrequency
4 MHz
Maximum Anode Dissipation
5000 W
Absolute maximum / applicable service

Capacitance

GridPlateCapacitance
23.5 pF
GridFilamentCapacitance
16.6 pF