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Specialized - Switching Tube ·RelayControlSwitch

GR33

Cold-cathode relay tube with stable starter breakdown voltage for DC control. Gas-discharge operation provides repeatable heaterless switching.

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

Description

Cold-cathode relay tube with molybdenum cathode and closely controlled, highly stable starter breakdown voltage for DC relay/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

  • Starter breakdown voltage

    128 to 147 V

    StarterPositive

  • Maintaining voltage A-K

    105 V

  • Control current direct

    0.025 to 8 mA

    UA>=240V

  • Control capacitance at 170 V

    2700 to 4700 pF

Other

  • Cathode current mean maximum

    25 mA

  • Cathode current peak maximum

    100 mA

  • Anode supply voltage

    170 to 290 V

  • Keep-alive anode current maximum

    25 uA