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Nixie ·Triode

A109

Cold-cathode glow-discharge Dekatron intended for counting, switching, and counting/calculating equipment. The blue discharge moves sequentially between cathodes, serving as both the active switching/counting mechanism and a visible state indicator.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
Philips 4-pin
Socket code
-
Base pins
4
Nominal heater
1.15 V / 60 mA

Description

Russian cold-cathode glow-discharge Dekatron intended for counting, switching, or counting-and-calculating equipment. It transfers a visible discharge among cathodes; blue glow is used for indication.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
Philips 4-pin
Socket code
-
Base pins
4
Nominal heater voltage
1.15 V
Nominal heater current
60 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Philips 4-pin - 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

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
22500 Ω
Transconductance
0.0004 S
Amplification factor
9
Max plate voltage
120 V

Electrical values not fitting canonical promoted fields are preserved in TUBE_SECTION_PARAMETER.

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

196X Nixie Russian 1

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Scale factor

    10

    Published datasheet value

  • Anode supply voltage

    400 to - V

    Published datasheet value

  • Discharge maintaining voltage

    165 to 205 V

    Published datasheet value

  • Reset pulse amplitude

    70 V

    Published datasheet value

  • Operating current

    0.7 to 0.9 mA

    Published datasheet value

  • Control pulse amplitude

    30 V

    Published datasheet value

  • Service life

    1000 h

    Published datasheet value

Data set 02

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Filament voltage range

    1 to 1.3 V

    Published datasheet value

  • Filament current

    60 mA

    Published datasheet value

  • Saturation current

    10 mA

    Published datasheet value

  • Maximum quiescent current

    - to 4 mA

    Published datasheet value

  • Amplification factor

    9

    Published datasheet value

  • Maximum transconductance

    - to 0.4 mA/V

    Published datasheet value

  • Minimum internal resistance

    22500 to - Ω

    Published datasheet value

Other

  • Anode voltage range

    20 to 120 V

    Published datasheet value