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2B4

Gas-filled grid-controlled thyratron for switching, controlled-rectifier, relay, motor-control, oscillator, or pulse service as documented by the manufacturer.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: 5A
Socket code: IO
Base pins: 5
Nominal heater: 2.5 V / 1.4 A

Description

The Du Mont 2B4 is a gas-filled triode used as a sweep oscillator and in control or counter circuits.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 5A
Socket code: IO
Base pins: 5
Nominal heater voltage: 2.5 V
Nominal heater current: 1.4 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

5A - 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 plate voltage: 300 V

Gas-discharge sweep-oscillator/control section.

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

1960 Du Mont

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Characteristics

Tube Voltage Drop
19 V
Approximate
Minimum Sweep Frequency
1 Hz
Maximum Sweep Frequency
30000 Hz
Grid-to-Anode Capacitance
2.8 pF
Nominal
Grid-to-Cathode Capacitance
1.7 pF
Nominal
Anode-to-Cathode Capacitance
2 pF
Nominal

Other

Maximum Instantaneous Anode Voltage
300 V
SweepOscillator
Maximum Peak Anode Current
300 mA
SweepOscillator
Maximum Average Anode Current
1 mA
SweepOscillator