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Nixie ·Nixie

CD70

Cold-cathode numerical or character indicator cross-referenced to RFT Z5730M for direct electronic display service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
Wire lead
Socket code
P9Z1PLUS
Base pins
-
Nominal heater
-

Description

CD70 is a cold-cathode numeric or character indicator tube listed in the supplied German comparison catalog as comparable to RFT type Z5730M. The catalog provides electrical and mechanical data for that RFT type, including anode striking, maintaining, and operating limits. The source cautions that comparable types are not necessarily electrically identical, so the mapped RFT values are retained as comparison data rather than asserted as exact original-manufacturer ratings.

Socket description

P9Z-1 plus 14-wire Nixie base family

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
Wire lead
Socket code
P9Z1PLUS
Base pins
-
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

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