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Tube Tinker — Electron Tube Database
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Specialized - Switching Tube ·RelayControlSwitch

GR41

Cold-cathode two-starter relay tube for DC control. Multiple starter electrodes provide flexible gas-discharge triggering and switching.

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

Description

Cold-cathode relay tube with two starters for DC operation, a keep-alive anode, and stable low-current triggering.

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

    6mA

  • Cathode current mean

    4 to 10 mA

  • Direct control current

    0.2 to 10 mA

  • Capacitance-control current

    0.000001 to 10 mA

  • Control capacitance

    200 to 5000 pF

Other

  • Anode supply voltage

    250 to 350 V