NL-989
15.5mm symbol tube manufactured by National Electronics
The NL-989 is a clear glass symbol tube manufactured by National Electronics. It can display various electronic units in two rows. The upper row can display the letters M,K and A. The lower row can display the Ohm-sing, and the letters V and C. It is likely that this tube was used in digital multimeters or similar devices
| Brand / Manfacturer | National Electronics |
| Same Types | |
| Likely Tyes | |
| Symbol height in mm | 15.5 |
| Characters / Symbols | M,K,A,V,C,Ω |
| Decimal point | none |
| Base / Socket | 0 |
| Starting Voltage (typ) | tested at 170V, 10kOhm V |
| Maintaining Voltage (typ) | 0 V |
| Current per Segment | 3mA |
| Reccomend Resistor |
