15.5mm symbol tube manufactured by National Electronics

The NL-847 is a clear glass symbol tube manufactured by National Electronics. It can display plus and minus. Its considered "long-life"
Brand / Manfacturer National Electronics
Same Types
Likely Tyes
Symbol height in mm 15.5
Characters / Symbols +,-
Decimal point none
Base / Socket RTS-14
Starting Voltage (typ) 170 V
Maintaining Voltage (typ) 0 V
Current per Segment 4mA
Reccomend Resistor 7kOhm @ 170V, 33kOhm @ 250V, 50kOhm @ 300V