7.8mmmm numeric tube manufactured by Burroughs

The B4021 is a very small numeric endview nixie tube manufactured by Burroughs. It has a very low ionization voltage of only 120V. The B4024 is very similar but has letters and numbers
Brand / Manfacturer Burroughs
Same Types
Likely Tyes
Symbol height in mm 7.8mm
Characters / Symbols 0-9
Decimal point none
Base / Socket SK-116
Starting Voltage (typ) 120 V
Maintaining Voltage (typ) 100 V
Current per Segment 1mAmA
Reccomend Resistor 20kOhm @ 120V