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CH10279

CH1027-family Curpistor constant-current regulator intended for specialized precision circuits requiring a stable predetermined current.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
2
Nominal heater
-

Description

Subminiature two-electrode radioactive nitrogen-filled Curpistor constant-current tube rated at 10^-9 A with a 25–500 V current plateau.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
2
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

Other

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Two-electrode nitrogen-filled constant-current regulator; no dedicated canonical current-regulator SectionType.

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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Other

Characteristic

  • Current rating

    0.000001 mA

  • Maximum current variation from center value

    1 %

    25-500V plateau

Other

  • Plateau voltage minimum

    25 V

  • Plateau voltage maximum

    500 V

  • Radium-226 activity

    18.75 microcurie

  • Ambient temperature minimum

    -70 degC

  • Ambient temperature maximum

    80 degC

Data set 02

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Other

Characteristic

  • Constant current rating

    0.000001 mA

    CenterValue

  • Current plateau voltage minimum

    25 V

    CurrentPlateau

  • Current plateau voltage maximum

    500 V

    CurrentPlateau

  • Maximum current variation from center value

    1 %

    25To500VPlateau

  • Radioactive activity

    78.75 uCi

  • Life

    Unlimited

    Radium226HalfLife1620Years

  • Radium-226 half life

    1620 years

Construction

  • Gas fill

    Nitrogen

  • Active material

    Radium-226

    Radioactive

  • Base/construction

    SubminiatureFlatPressWithTwoFlyingLeads

Other

  • Ambient temperature minimum

    -70 degC

  • Ambient temperature maximum

    80 degC

  • Mounting position

    Any

Application

  • Typical application

    Constant capacitor drain or charge

    MissileAndOrdnanceTiming

  • Typical application

    Instrument bias

  • Typical application

    Ionization chamber testing

  • Typical application

    Calibration standard