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Specialized - Thyratron ·Thyratron

269A

Argon-filled grid-controlled rectifier for relay and trigger circuits, controlled-frequency oscillators, level indication, and sweep generation.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
MEDIUM5
Base pins
4
Nominal heater
2.2 V / 550 mA

Description

Three-element argon-filled grid-controlled rectifier intended for relay and trigger-action circuits, controlled-frequency oscillators, level indication, and sweep generation.

Socket description

Medium 5-contact transmitting-tube base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
MEDIUM5
Base pins
4
Nominal heater voltage
2.2 V
Nominal heater current
550 mA
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
200 mA
Rectifier forward voltage drop
24 V

Conducting drop 16–24 V; condenser-discharge instantaneous current max 0.2 A.

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

2026 Western Electric 200s

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Other

  • AnodeCathodePotentialDrop

    16 to 24 V

    Conducting

  • MaximumInstantaneousSpaceCurrentSineWave

    20 mA

  • MaximumAnodeControlElectrodePotential

    275 V