Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

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

F212E

Federal radiation-cooled power triode for modulator, RF amplifier, and oscillator service. Approximately 275 W plate dissipation and multi-kilovolt operation provide moderate transmitter power from a directly heated pure-tungsten filament.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
14 V / 6 A

Description

Federal F-212-E radiation-cooled power triode for modulator, RF amplifier and oscillator service; 275 W 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
14 V
Nominal heater current
6 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
16
Max plate voltage
5000 V
Max plate dissipation
275 W
Max cathode current
350 mA

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

  • Filament Voltage

    14 V

  • Filament Current

    6 A

  • Amplification Factor

    16

  • Typical RF Power Output

    500 W

Capacitance

  • Grid-Plate Capacitance

    19 pF

  • Grid-Filament Capacitance

    14.5 pF

  • Plate-Filament Capacitance

    5 pF

Other

  • Maximum Plate Voltage

    5000 V

  • Maximum Plate Dissipation

    275 W

  • Maximum Signal DC Plate Current

    350 mA

  • Maximum Signal Plate Input

    700 W

  • Maximum Frequency for Ratings

    1.6 MHz

Data set 02

1962 ITT Industrial and Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • AnodeCoolingMethod

    Radiation

  • MaximumOperatingFrequency

    1.6 MHz

  • Maximum Anode Dissipation

    275 W

    Absolute maximum / applicable service

Capacitance

  • GridPlateCapacitance

    19 pF

  • GridFilamentCapacitance

    14.5 pF

  • PlateFilamentCapacitance

    8 pF