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

TH318

Forced-air-cooled Thomson-CSF planar ceramic-metal power triode for RF oscillator, amplifier, and pulse service. High transconductance, substantial plate dissipation, and multi-kilovolt capability support demanding professional RF applications.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 5.5 A

Description

The Thomson-CSF TH318 is a forced-air-cooled planar ceramic/metal triode for rf oscillator/amplifier and pulse 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
6.3 V
Nominal heater current
5.5 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
Transconductance
0.045 S
Amplification factor
90
Max plate voltage
6200 V
Max plate dissipation
700 W
Max grid dissipation
3 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

Triode

Characteristic

  • Amplification factor

    90

  • Transconductance

    45000 uS

Other

  • Maximum anode voltage

    6200 V

  • Maximum anode dissipation

    700 W

  • Maximum grid dissipation

    3 W

  • Maximum operating frequency

    1500 MHz

  • Pulse repetition rate

    1500 Hz

  • Pulse width

    1.5 us

  • Typical frequency minimum

    1250 MHz

  • Typical frequency maximum

    1350 MHz

  • Peak anode voltage

    6000 V

  • Peak anode current

    11 A

  • Peak grid current

    4 A

  • Peak output power

    40000 W

  • Average output power

    90 W

Capacitance

  • Grid-anode/input capacitance

    8.5 pF

  • Grid-cathode/output capacitance

    15 pF

  • Cathode-anode capacitance

    0.1 pF