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

F862A

Water-cooled three-electrode power tube for RF amplification, oscillation, and Class B modulation. Approximately 100 kW plate dissipation and 20 kV capability provide enormous RF or audio-modulator power for major transmitters.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
33 V / 207 A

Description

Three-electrode power tube for radio-frequency amplifier, oscillator, or Class B modulator service. The water-cooled anode is capable of 100 kW 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
33 V
Nominal heater current
207 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
45
Max plate voltage
20000 V
Max plate dissipation
100000 W
Max cathode current
10 A

Cooling: Water and Forced Air

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

    45

Other

  • Maximum plate voltage

    20000 V

  • Maximum plate dissipation

    100000 W

  • Peak cathode current

    7.5 A

  • Maximum/full-ratings frequency

    1.6 MHz

  • Maximum RF plate voltage

    20000 V

  • Maximum RF plate dissipation

    75000 W

Capacitance

  • Grid-plate capacitance

    64 pF

  • Grid-filament capacitance

    56 pF

  • Plate-filament capacitance

    4.7 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

Characteristics

  • GridPlateCapacitance

    64 pF

  • GridFilamentCapacitance

    56 pF

  • PlateFilamentCapacitance

    4.7 pF

  • FilamentStartingCurrent

    400 A

  • FilamentColdResistance

    0.014 ohm

Other

  • Maximum DC Grid Voltage

    -3000 V

    ClassC

  • Maximum DC Plate Current

    10 A

    ClassC

  • Maximum DC Grid Current

    1 A

    ClassC

  • Maximum Plate Input

    200 kW

    ClassC

  • Typical Power Output

    100 kW

    ClassC