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8257

Cold-cathode corona regulator providing approximately 1.2 kV stabilization at microampere currents for high-voltage references and low-power instrumentation supplies.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: -

Description

Two-electrode gas-filled cold-cathode tube for corona-mode voltage-regulator applications around 1.2 kV.

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: 1200 V
Regulator minimum current: 0.015 mA
Regulator maximum current: 0.75 mA
Regulator starting voltage: 1320 V
Regulator maintaining voltage: 1200 V

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

1950 Victoreen

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Characteristic

RegulatedVoltage
1200 V
VoltageRegulation
30 V
Published current range
Temperature Coefficient
175 mV/C

Other

StartingOrBreakdownVoltage
1320 V
MinimumRegulatorCurrent
15 uA
MaximumRegulatorCurrent
750 uA