NL-864
??mm symbol tube manufactured by National Electronics
The NL-864 is a clear glass symbol tube made by National Electronics. There is one symbol row with "Hz, S," and on top a second row with "K,µ,n,M", making it possible to display "kHz". I guess this tube was used in a frequency counter or similar device. Currently i have no more info about this tube or any data. It seems to be a rather rare tube.
| Brand / Manfacturer | National Electronics |
| Same Types | |
| Likely Tyes | |
| Symbol height in mm | ?? |
| Characters / Symbols | Hz,S,K,µ,M,n |
| Decimal point | none |
| Base / Socket | 0 |
| Starting Voltage (typ) | 0 V |
| Maintaining Voltage (typ) | 0 V |
| Current per Segment | 0mA |
| Reccomend Resistor | 0 |
