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Nixie ·Nixie

Z870M

RFT cold-cathode numerical/symbol indicator with 15.5 mm side-viewed characters. Manufacturer data specify approximately 150 V ignition, 140 V maintaining voltage, a 170 V minimum operating supply, and 3–5 mA cathode current for glow-discharge display service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
9–12 TGL 11608
Socket code
B9A
Base pins
-
Nominal heater
-

Description

Z870M is a cold-cathode Nixie numerical/symbol indicator tube. The supplied RFT sheet gives 150 V ignition and 140 V burning voltage, a 170 V minimum operating supply, 3–5 mA cathode current, and 15.5 mm side-viewed symbols. Z870M is tabulated directly in the supplied RFT display-tube data sheet.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
9–12 TGL 11608
Socket code
B9A
Base pins
-
Nominal heater voltage
-
Nominal heater current
-
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9–12 TGL 11608 - 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
Max plate voltage
170 V
Max cathode current
5 mA
Regulator starting voltage
150 V
Regulator maintaining voltage
140 V

Cold-cathode glow-display section; maximum cathode current promoted in amperes.

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

Characteristic

  • Anode Ignition Voltage

    150 V

    Published RFT table

  • Anode Burning Voltage

    140 V

    Published RFT table

Other

  • Minimum Operating Voltage

    170 V

    Published RFT table

  • Minimum Cathode Current

    3 mA

    Published RFT table

  • Maximum Cathode Current

    5 mA

    Published RFT table

  • Peak Cathode Current

    7 mA

    Published RFT table

  • Minimum Ambient Temperature

    -50 degC

    Published RFT table

  • Maximum Ambient Temperature

    70 degC

    Published RFT table

  • Symbol Height

    15.5 mm

    Published RFT table

  • Maximum Viewing Distance

    10 m

    Published RFT table

  • Maximum Bulb Height

    49.2 mm

    Published RFT table

  • Maximum Bulb Diameter

    22.2 mm

    Published RFT table