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

7480

Vapor-cooled ceramic-metal high-power triode for AM broadcasting, communications, and industrial RF heating. Extremely high plate dissipation and kilovolt operation provide major fixed-station transmitter and industrial-generator power.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
13 V / 205 A

Description

Vapor-cooled ceramic-metal power triode for AM broadcast, communications and industrial heating.

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
13 V
Nominal heater current
205 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
16000 V
Max plate dissipation
80000 W
Max grid dissipation
1000 W
Max cathode current
11 A

Promoted fields populated from published ratings/characteristics; additional published values retained 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 Eimac

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Filament Current

    190 A to 220 A

Other

  • Starting Filament Current Maximum

    800 A

  • Frequency for Maximum Ratings

    40 MHz

  • Maximum DC Plate Current RF Class C

    11 A

    ClassC

  • Maximum DC Grid Voltage

    -3200 V

  • Maximum DC Grid Current

    2 A

    ClassC

  • Typical RF Plate Voltage

    15 kV

    ClassC

  • Typical RF Plate Output Power

    80 kW

    ClassC

  • Typical AF Plate Output Power

    152 kW

    ClassAB;TwoTubes

Capacitance

  • Grid-Plate Capacitance

    50 to 60 pF

  • Grid-Filament Capacitance

    65 to 85 pF

  • Plate-Filament Capacitance

    2 to 3.2 pF

Data set 02

1965 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Filament Current Range

    190 A to 220 A

Other

  • Grid Dissipation Maximum

    1000 W

  • DC Plate Current Maximum

    11 A

  • DC Grid Current Maximum

    2 A

  • Typical Plate Voltage

    12000 V

  • Typical Plate Output Power

    83000 W

  • AF Two-Tube Output Power

    152000 W

  • Frequency Full Rating Maximum

    40 MHz

  • Reduced-Rating Frequency Maximum

    80 MHz