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Specialized - Thyratron ·Thyratron

7400

Compact cold-cathode self-indicating gas thyratron for relay and control service, producing a visible neon-colored glow while conducting.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
-

Description

The 7400 is a compact cold-cathode gas thyratron designed for relay and control service, providing a bright neon-colored glow when conducting.

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
-
Nominal heater current
-
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

Thyratron

X-ray radiationInterelectrode capacitances
Max cathode current
12 mA

Cold-cathode thyratron; relay/switching ratings 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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Other

  • PositiveAnodeVoltageMaximum

    180 V

  • NegativeAnodeVoltageMaximum

    100 V

  • Anode Supply Voltage

    150 V

  • Anode Current

    7 mA

Characteristic

  • AnodeIonizationVoltage

    210 V

  • GridIonizationVoltage

    109 V

  • CurrentAmplification

    1000

Data set 02

1966 Tung Sol Electronic Tubes 4 of 4

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Characteristic

  • Anode

    1 MA

    PublishedTable

  • Anode

    10 MA

    PublishedTable

  • Grid

    1 MA

    PublishedTable

  • Grid

    109 VOLTS

    PublishedTable

  • Anode Supply Voltage

    15 VDC

    PublishedTable

  • Grid Circuit Should Contain A 5,000 Ohm Series Resistance If The Source

    0 OHM

    PublishedTable

Other

  • Positive Anode Voltage (Max.)

    1 VDC

    PublishedTable

  • Transfer Current @ Eb = 150 Vdc

    150 VDC

    PublishedTable