NL4998

Long-life neon-filled cold-cathode numerical readout tube displaying digits 0–9. National Electronics specifies a maximum ionization voltage of 170 V and 170 V minimum supply, with published cathode-current limits for stable display operation.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: RTS32
Base pins: -
Nominal heater: -

Description

NL4998 is a long-life neon-filled cold-cathode display/readout tube displaying numerals 0–9. The supplied sheet specifies a 170 V maximum ionization voltage, 170 V minimum supply, and published cathode-current limits.

Socket description

National Electronics RTS-32/RTS-33 Nixie/readout tube socket family

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: RTS32
Base pins: -
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

Nixie

X-ray radiationInterelectrode capacitances

Max plate voltage: 170 V
Max cathode current: 3.5 mA

Cold-cathode glow display section; peak cathode-current limit promoted.

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

1968 Nixie National Electronics

Published operating points and test conditions from this source.

SECTION 1

Nixie

Other

Ionization Voltage Maximum
170 V
Published technical information
Peak Cathode Current Maximum
3.5 mA
Published technical information
Average Cathode Current Maximum
3 mA
Published technical information
Ambient Temperature Minimum
-20 degC
Normal life range
Ambient Temperature Maximum
55 degC
Normal life range
Recommended Supply Voltage
170 V
Published technical information
Recommended Supply Voltage
250 V
Published technical information
Recommended Supply Voltage
300 V
Published technical information

Characteristic

Supply Voltage Minimum
170 V
Published technical information
Average Cathode Current Minimum
1.5 mA
Published technical information
Prebias Voltage Minimum
65 V
Off cathodes
Prebias Voltage Maximum
120 V
Off cathodes
Dynamic Life
200000 h
Published dynamic life