GL427

Small air-cooled glass ignitron designed primarily for classroom and laboratory demonstration of ignitron construction and operation, with practical high-current rectifier ratings.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B4B
Base pins: -
Nominal heater: -

Description

The GL-427 is a small glass air-cooled ignitron designed primarily to demonstrate ignitron construction and operating characteristics in classroom or laboratory work.

Socket description

Medium 4-pin bayonet

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B4B
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

Rectifier peak inverse voltage: 350 V
Rectifier nominal output current: 10 A
Rectifier peak forward current: 30 A

Air-cooled ignitron; forced-air average-current rating promoted; free-air value retained as parameter.

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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

IgnitronPowerSwitch

Other

Average Anode Current Free-Air
5 A
FreeAir
Average Anode Current Forced-Air
10 A
ForcedAir

Characteristic

Ignitor Voltage Required
150 V
Ignition
Ignitor Current Required
30 A
Ignition