The XN1 is an early Nixie tube produced by Hivac in Great Britain and Lorenz in Germany. The earliest documentation referencing this tube I could find is dated September 9, 1961, shortly after the invention of Nixie tubes. This particular unit features an evaporative getter at the top, giving it a distinctive appearance typically associated with vacuum tubes (often seen in VFDs). However, versions with a getter located behind the anode cage were also manufactured. The tube’s anode cage is notably restrictive, limiting visibility to mostly straight-on angles. Unlike many other tubes of similar size, the XN1 does not include any decimal points.
Key Specifications
| Property | Description |
|---|---|
| Manufacturer | Hivac |
| Time period | early 1960s |
| Digit height | 14mm |
| Envelope diameter | 19mm |
| Envelope height | 47.6mm |
| Socket | N/A |
References
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