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

F320BA

Forced-air-cooled Federal power triode for RF amplification, oscillation, and Class B modulation. Approximately 5 kW plate dissipation and 15 kV capability provide substantial transmitter power without liquid cooling.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
21.5 V / 41 A

Description

Federal F-320BA/220CA forced-air-cooled power triode for RF 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
41 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
15000 V
Max plate dissipation
5000 W
Max cathode current
2.5 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

    82 A

  • Available Thermionic Emission

    7 A

  • Grid-Plate Capacitance

    23.5 pF

  • Grid-Filament Capacitance

    17.5 pF

  • Plate-Filament Capacitance

    1.6 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

    82 A

  • Peak Cathode Current

    7 A

  • AnodeCoolingMethod

    Forced Air

  • MaximumOperatingFrequency

    4 MHz

  • Maximum Anode Dissipation

    5000 W

    Absolute maximum / applicable service

Capacitance

  • GridPlateCapacitance

    23.5 pF

  • GridFilamentCapacitance

    17.5 pF