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.
|Symbol height (mm)||15.5|
|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.