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Tube Tinker — Electron Tube Database
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Voltage Regulator ·VoltageRegulator

GR2820

Cold-cathode glow-discharge voltage stabilizer for heaterless shunt regulation or reference service in electronic power supplies.

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

Description

Voltage-regulator discharge tube for automatic stabilization of DC voltage around 125 V; equivalent to GR28-20.

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

Voltage Regulator

X-ray radiationInterelectrode capacitances
Regulator voltage
125 V
Regulator minimum current
5 mA
Regulator maximum current
60 mA
Regulator starting voltage
180 V
Regulator maintaining voltage
125 V
Regulator dynamic impedance
150 Ω

Published electrical ratings and characteristics promoted from the approved source.

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

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Other

  • RegulatorVoltage

    125 V

  • RegulatorCurrentMinimum

    5 mA

  • RegulatorCurrentMaximum

    60 mA

  • RegulatorStartingVoltage

    180 V

  • RegulatorMaintainingVoltage

    125 V

  • RegulatorDynamicImpedance

    150 ohm