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Nixie ·Nixie

CD66

Cold-cathode Nixie numerical indicator documented by NEC and Japanese specification tables for direct digit-display applications.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
Wire lead
Socket code
-
Base pins
12
Nominal heater
-

Description

Cold-cathode Nixie numerical indicator from a shared Japanese specification table; model-specific column extracted for CD66. The table supplies ionization voltage, cathode-current range, power/current limits, temperature range, viewing angle, and recommended anode-resistor values.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
Wire lead
Socket code
-
Base pins
12
Nominal heater voltage
-
Nominal heater current
-
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Wire lead - 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

Nixie

X-ray radiationInterelectrode capacitances
Regulator starting voltage
150 V
Regulator maintaining voltage
140 V

Cold-cathode display section; promoted starting/maintaining voltages are anode striking/burning values published for comparable RFT type Z5730M.

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 NEC

Published operating points and test conditions from this source.

SECTION 1

Nixie

Display

  • Display content

    Digits 0-9 and decimal point

  • Viewing orientation

    side

  • Display construction

    side-view

Other

  • Display height

    16 mm

  • Overall length maximum

    47.6 mm

  • Bulb size maximum

    19 mm

  • Lead length minimum

    33 mm

  • Anode supply voltage minimum

    170 to - Vdc

    Minimum DC anode supply

  • Cathode current

    1.5 to 3 mA

    Digits 0-9

  • Decimal-point cathode current

    0.3 to 0.7 mA

    Decimal point

Base

  • Socket or termination

    Wire-leaded

Data set 02

196X Nixie Random Datasheets

Published operating points and test conditions from this source.

SECTION 1

Nixie

Other

  • Supply voltage minimum

    170 V

    DC operation

  • Ionization voltage maximum

    170 V

    DC operation

  • Average cathode power dissipation maximum

    0.5 W

    Each numerical cathode

  • Peak cathode current maximum

    3.5 mA

    Numerical cathode

  • Average cathode current range

    1.5 to 3 mA

    Numerical cathode

  • Storage ambient temperature

    -65 to 70 °C

  • Operating ambient temperature

    -10 to 55 °C

  • Maximum viewing angle

    100 deg

    Approximate

  • Weight

    10 g

    Approximate

  • Anode series resistor

    20 kΩ

    SupplyVoltage=190V

  • Anode series resistor

    24 kΩ

    SupplyVoltage=200V

  • Anode series resistor

    47 kΩ

    SupplyVoltage=250V

  • Anode series resistor

    68 kΩ

    SupplyVoltage=300V

Characteristics

  • Numerical cathode current

    1.5 to 3 mA

    DC operation

  • Decimal-point cathode current

    0.3 to 0.7 mA

    DC operation

Data set 03

1971 Nixie RFT

Published operating points and test conditions from this source.

SECTION 1

Nixie

Other

  • Comparable RFT Type

    Z5730M

    Catalog cross-reference; comparable types are not guaranteed identical

  • Minimum Operating Supply Voltage

    170 V

    Published for comparable RFT type Z5730M

  • Cathode Current Minimum

    1.5 mA

    Published for comparable RFT type Z5730M

  • Cathode Current Maximum

    2.5 mA

    Published for comparable RFT type Z5730M

  • Peak Cathode Current

    12 mA

    Published for comparable RFT type Z5730M

  • Ambient Temperature Minimum

    -50 °C

    Published for comparable RFT type Z5730M

  • Ambient Temperature Maximum

    70 °C

    Published for comparable RFT type Z5730M

  • Maximum Bulb Height

    47.6 mm

    Published for comparable RFT type Z5730M

  • Maximum Bulb Diameter

    19 mm

    Published for comparable RFT type Z5730M

Characteristic

  • Anode Striking Voltage

    150 V

    Published for comparable RFT type Z5730M

  • Anode Maintaining Voltage

    140 V

    Published for comparable RFT type Z5730M

  • Anode Extinction Voltage

    120 V

    Published for comparable RFT type Z5730M