Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Switching Tube ·Tetrode

GR32

Cold-cathode gas tetrode for relay, control, and pulse-switching service, using gas-discharge conduction for rapid high-current control.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
9
Nominal heater
-

Description

Cold-cathode gas relay tetrode with molybdenum cathode, two anodes and starter, usable in triode or tetrode operation.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
9
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 0

Tetrode

X-ray radiationInterelectrode capacitances
Max cathode current
25 mA

Cold-cathode switching/relay/display section; device-specific glow-discharge values preserved in parameter table.

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

1962 Cerberus

Published operating points and test conditions from this source.

SECTION 0

Tetrode

Other

  • AnodeSupplyVoltageTriode

    140 to 205 V

    TriodeOperation peak

  • MeanCathodeCurrent

    5 to 25 mA

    TriodeOperation

  • Peak Cathode Current

    - to 125 mA

    TriodeOperation

  • KeepAliveAnodeSupplyVoltage

    150 to - V

  • AnodeSupplyVoltageTetrodeDC

    140 to 410 V

    TetrodeOperation

  • PotentialDifferenceAnodes

    - to 200 V

    TetrodeOperation