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

F7C25

Medium-mu ITT power triode for Class C RF amplifier service. Approximately 2.5 kW plate dissipation, multi-kilovolt operation, and useful service to roughly 50 MHz provide substantial professional transmitter power.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
11 V / 28 A

Description

Three-electrode industrial power triode intended for severe radio-frequency heating service. The forced-air-cooled anode is rated for 2.5 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
11 V
Nominal heater current
28 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
25
Max plate voltage
5000 V
Max plate dissipation
2500 W
Max cathode current
10 A

Cooling: 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

    25

Other

  • Peak cathode current

    10 A

  • Maximum plate voltage

    5000 V

  • Maximum plate dissipation

    2500 W

  • Maximum frequency

    50 MHz

Capacitance

  • Grid-plate capacitance

    13.2 pF

  • Grid-filament capacitance

    14.5 pF

  • Plate-filament capacitance

    1.7 pF

Data set 02

1962 ITT Industrial and Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • GridPlateCapacitance

    13.2 pF

  • GridFilamentCapacitance

    14.5 pF

  • PlateFilamentCapacitance

    1.1 pF

  • FilamentStartingCurrent

    56 A

  • FilamentColdResistance

    0.047 ohm

Other

  • Maximum DC Grid Voltage

    -1500 V

    ClassC

  • Maximum DC Plate Current

    1.3 A

    ClassC

  • Maximum DC Grid Current

    150 mA

    ClassC

  • Maximum Plate Input

    6.5 kW

    ClassC

  • Typical Power Output

    4 kW

    ClassC