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Power - Tetrode (NOT beam) (over 1000V 100W) ·Tetrode

TH331

Forced-air-cooled coaxial ceramic-metal tetrode designed for high-power linear television-translator service. Its construction provides substantial broadband RF output for relay transmitters.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
5 V / 65 A

Description

The Thomson-CSF TH331 is a forced-air-cooled coaxial ceramic/metal tetrode for high-power linear television-translator 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
5 V
Nominal heater current
65 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

Tetrode

X-ray radiationInterelectrode capacitances
Transconductance
0.05 S
Amplification factor
5
Max plate voltage
5200 V
Max screen voltage
600 V
Max plate dissipation
7000 W
Max screen dissipation
75 W
Max grid dissipation
5 W

Promoted from printed general-characteristics and maximum-ratings tables.

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

1972 Thomson CSF

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

  • Amplification factor

    5

  • Transconductance

    50000 uS

Other

  • Maximum anode voltage

    5200 V

  • Maximum screen-grid voltage

    600 V

  • Maximum anode dissipation

    7000 W

  • Maximum screen-grid dissipation

    75 W

  • Maximum grid dissipation

    5 W

  • Maximum operating frequency

    1000 MHz

  • Typical frequency

    780 MHz

  • Typical filament voltage

    4.8 V

  • Typical anode voltage

    3500 V

  • Typical screen voltage

    500 V

  • Typical anode current

    1.8 A

  • Gain

    13 dB

  • Peak video power

    1000 W

Capacitance

  • Grid-anode/input capacitance

    43 pF

  • Grid-cathode/output capacitance

    9 pF

  • Cathode-anode capacitance

    0.07 pF