8021

Cold-cathode Nixie numerical indicator cross-referenced to RFT Z560M, intended for direct glowing digit display.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 13-17 TGL 68-87
Socket code: B13B
Base pins: -
Nominal heater: -

Description

8021 is a cold-cathode numeric or character indicator tube listed in the supplied German comparison catalog as comparable to RFT type Z560M. 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

B13B Nixie 13-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 13-17 TGL 68-87
Socket code: B13B
Base pins: -
Nominal heater voltage: -
Nominal heater current: -
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

13-17 TGL 68-87 - 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: 145 V
Regulator maintaining voltage: 135 V

Cold-cathode display section; promoted starting/maintaining voltages are anode striking/burning values published for comparable RFT type Z560M.

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
Z560M
Catalog cross-reference; comparable types are not guaranteed identical
Minimum Operating Supply Voltage
170 V
Published for comparable RFT type Z560M
Cathode Current Minimum
1 mA
Published for comparable RFT type Z560M
Cathode Current Maximum
2.5 mA
Published for comparable RFT type Z560M
Peak Cathode Current
10 mA
Published for comparable RFT type Z560M
Ambient Temperature Minimum
-50 °C
Published for comparable RFT type Z560M
Ambient Temperature Maximum
70 °C
Published for comparable RFT type Z560M
Symbol Height
15.5 mm
Published for comparable RFT type Z560M
Maximum Viewing Distance
10 m
Published for comparable RFT type Z560M
Maximum Bulb Height
26.5 mm
Published for comparable RFT type Z560M
Maximum Bulb Diameter
30.1 mm
Published for comparable RFT type Z560M

Characteristic

Anode Striking Voltage
145 V
Published for comparable RFT type Z560M
Anode Maintaining Voltage
135 V
Published for comparable RFT type Z560M
Anode Extinction Voltage
120 V
Published for comparable RFT type Z560M