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

7480A

Vapor-cooled high-power triode for 50–75 kW industrial RF heating and AM broadcasting, with 80-kW plate dissipation.

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

Description

General-purpose vapor-cooled triode for 50–75 kW industrial heating and AM broadcasting.

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

Applicable promoted ratings populated from printed headings; remaining published device-specific data retained as parameters.

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

1971 Machlette Laboratories

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Grid-Plate Capacitance

    55 pF

  • Grid-Filament Capacitance

    75 pF

  • Plate-Filament Capacitance

    3.2 pF

Other

  • Filament Starting Current

    800 A

  • Maximum DC Plate Current

    11 A