15.5mm 13-segment tube manufactured by National Electronics

The NL-5971 is a segment tube manufactured by National Electronics and also by Burroughs. It can display 13 individual segments, allowing to show alphanumeric characters. It has a very flat and slim glass envelope. Its similar to the B-7971 which is bigger and has 15 segments.
Brand / Manfacturer National Electronics
Same Types
Likely Tyes
Symbol height in mm 15.5
Characters / Symbols 13 Segments
Decimal point none
Base / Socket SK169
Starting Voltage (typ) 170 V
Maintaining Voltage (typ) 0 V
Current per Segment 0.5 to 4mA
Reccomend Resistor 15kOhm @ 170V = 2mA


Note: This tube shows a shiny coating, because it was used for a very long time and has nearly reached the end of life.