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

TH297

Forced-air-cooled ceramic-metal coaxial transmitting tetrode designed for television, FM, and linear RF service. Its professional construction supports high-power broadband output.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
3.2 V / 80 A

Description

The Thomson-CSF TH297 is a forced-air-cooled ceramic/metal coaxial transmitting tetrode for television, fm and linear rf 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
3.2 V
Nominal heater current
80 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
0.02 S
Amplification factor
20
Max plate voltage
4500 V
Max screen voltage
800 V
Max plate dissipation
1500 W
Max screen dissipation
20 W
Max grid dissipation
10 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

    20

  • Transconductance

    20000 uS

Other

  • Maximum anode voltage

    4500 V

  • Maximum screen-grid voltage

    800 V

  • Maximum anode dissipation

    1500 W

  • Maximum screen-grid dissipation

    20 W

  • Maximum grid dissipation

    10 W

  • Maximum operating frequency

    1200 MHz

  • Maximum anode dissipation

    1500 W

  • Maximum screen dissipation

    20 W

  • Maximum control-grid dissipation

    10 W

  • Maximum frequency

    1200 MHz

  • Typical FM-service anode voltage

    4500 V

  • Typical FM-service anode current

    1.2 A

  • Typical FM-service output power

    1200 W

  • Typical linear-amplifier anode voltage

    6000 V

  • Typical screen voltage

    800 V

  • Typical heater voltage

    3 V

  • Typical gain

    13 dB