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

F8387

ITT forced-air-cooled very-high-power transmitting triode for RF amplification, oscillation, and Class B modulation. Approximately 45 kW plate dissipation and 17 kV capability provide extreme transmitter power without liquid cooling.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
14.5 V / 350 A

Description

The ITT F8387 is a forced-air-cooled very-high-power transmitting triode for RF amplification, oscillation, and Class B modulation.

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
14.5 V
Nominal heater current
350 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
20
Max plate voltage
17000 V
Max plate dissipation
45000 W

High-power transmitting triode section.

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

1964 RMA EIA

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Filament Voltage

    14.5 V

  • Filament Current

    350 A

  • Minimum Filament Heating Time

    15 s

  • Filament Cold Resistance

    0.006 ohm

  • Amplification Factor

    20 ratio

  • Grid-Plate Capacitance

    85 pF

  • Grid-Filament Capacitance

    120 pF

  • Plate-Filament Capacitance

    6 pF

Other

  • Filament Starting Current

    1000 A

  • Maximum Plate Dissipation

    45 kW

  • Maximum DC Plate Voltage

    17000 V

    ClassB; AudioPowerAmplifier

  • Maximum Signal Power Output

    165 kW

    ClassB; PushPull; TwoTubes; AudioAmplifier

  • RF Power Output

    136 kW

    ClassC; PlateModulatedTelephony

  • RF Power Output

    150 kW

    ClassC; Telegraphy; CathodeDrive

  • RF Power Output

    135 kW

    ClassC; Telegraphy; GridDrive