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Specialized - Switching Tube ·RelayControlSwitch

GR44

Cold-cathode relay tube with starter and keep-alive electrodes. Its gas discharge supports stable control and switching without a heater.

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

Description

Cold-cathode relay tube with molybdenum cathode, starter and keep-alive electrodes for relay, timing and industrial control circuits.

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

RelayControlSwitch

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this 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

1962 Cerberus

Published operating points and test conditions from this source.

SECTION 1

RelayControlSwitch

Characteristics

  • Anode breakdown voltage minimum

    400 V

  • Starter breakdown voltage

    120 to 140 V

    StarterPositive

  • Keep-alive breakdown voltage maximum

    180 V

  • Sustaining voltage A-K

    105 to 117 V

  • Cathode current mean

    5.5 to 12 mA

  • Control capacitance

    200 to 5000 pF

Other

  • Anode supply voltage

    250 to 350 V