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

TD2400A

Forced-air-cooled Mullard ceramic disc-seal power triode for RF oscillator, amplifier, and frequency-multiplier service. Rated around 400 W dissipation and 2.2 kV, it provides substantial high-frequency transmitting power.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
3.4 V / 19 A

Description

The Mullard TD2400A is a forced-air-cooled ceramic disc-seal triode for RF oscillator, amplifier or frequency-multiplier service.

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
3.4 V
Nominal heater current
19 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
Plate resistance
3300 Ω
Transconductance
0.01 S
Amplification factor
33
Max plate voltage
2200 V
Max plate dissipation
400 W

Forced-air-cooled ceramic disc-seal triode for RF oscillator, amplifier or frequency-multiplier service.

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

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater/Filament Voltage

    3.4 V

  • Heater/Filament Current

    19 A

  • Transconductance

    10000 uS

  • Amplification Factor

    33 ratio

  • Plate Resistance

    3300 ohm

  • Plate Voltage

    2000 V

  • Plate Current

    200 mA

  • Grid Voltage

    -40 V

  • Plate-Grid Capacitance

    6.5 pF

  • Grid-Filament Capacitance

    11.5 pF

  • Plate-Filament Capacitance

    0.12 pF

Other

  • Maximum Plate Voltage

    2200 V

  • Maximum Plate Dissipation

    400 W

  • Maximum Operating Frequency

    900 MHz

  • RF Output Power

    600 W

    Representative

  • RF Output Power

    510 W

    ClassC; GroundedGrid; 470MHz

  • RF Output Power

    328 W

    ClassC; GroundedGrid; 810MHz