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Power - Triode (over 1000V 100W) ·Triode

F343A

Federal water-cooled power triode for RF amplifier, oscillator, and modulator service. Approximately 10 kW plate dissipation and 18 kV capability provide high-voltage transmitter operation with efficient liquid cooling.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
21.5 V / 57.5 A

Description

Federal F-343-A water-cooled power triode for RF amplifier, oscillator and modulator service; 10 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
10000 W
Max cathode current
2.6 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

    120 A

  • Filament Cold Resistance

    0.0375 ohm

  • Grid-Plate Capacitance

    24 pF

  • Grid-Filament Capacitance

    17 pF

  • Plate-Filament Capacitance

    1.8 pF

  • RF Frequency Full Rating Maximum

    4 MHz

  • Typical AF Plate Voltage

    12000 V

  • RF Class C Plate Input Maximum

    36 kW

Data set 02

1962 ITT Industrial and Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • FilamentStartingCurrent

    120 A

  • AnodeCoolingMethod

    Water

  • MaximumOperatingFrequency

    4 MHz

  • Maximum Anode Dissipation

    10000 W

    Absolute maximum / applicable service

Capacitance

  • GridFilamentCapacitance

    17 pF

  • PlateFilamentCapacitance

    1.8 pF