7.75mm symbol tube manufactured by National Electronics

The NL-816 is a clear glass end-view symbol tube manufactured by National Electronics. It can display various symbols related to electronic units. The symbols have two columns that allows the combination of symbols to form units like "mV" or "GHz". It is likely that this tube was used in digital Multimeters. Also this is the only SK-136 Socket tube i know, that is mounted in a 90 degrees rotatet position. This tube is very rare.
Brand / Manfacturer National Electronics
Same Types
Likely Tyes
Symbol height in mm 7.75
Characters / Symbols µn,m,K,M,G,Hz,S,V
Decimal point none
Base / Socket SK-136
Starting Voltage (typ) 170 V
Maintaining Voltage (typ) 0 V
Current per Segment 1.5mAmA
Reccomend Resistor Tested at 10kOhm