1R21

Ignitron-type gas switching tube for radar pulsing service. Its controlled discharge handles high-voltage pulse switching in radar modulator and related circuits.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: -

Description

Ignitron-type gas switching tube for radar pulsing service with 9 kV peak forward-voltage capability.

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

IgnitronPowerSwitch

X-ray radiationInterelectrode capacitances

Max plate voltage: 9000 V
Max cathode current: 500 mA
Rectifier peak inverse voltage: 2000 V
Rectifier peak forward current: 400 A

Published electrical limits promoted from the source. Passive microwave reference cavities have their electrical frequency/Q values in TUBE_SECTION_PARAMETER because no applicable promoted frequency field exists in the fixed section schema.

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

1947 Westinghouse

Published operating points and test conditions from this source.

SECTION 1

IgnitronPowerSwitch

Other

MaximumElectrodeOrAnodeVoltage
9000 V
MaximumCurrent
500 mA
MaximumInverseVoltage
2000 V
MaximumPeakForwardCurrent
400 A

Characteristic

IgnitorVoltage
900 V
IgnitorCurrent
200 A
PulseRate
135 Hz