Making a Neo Nuvistor Project in 2026
Eric Schlaepfer recently constructed a discrete 555-style timer using tetrode nuvistors to demonstrate the practical application of this vintage vacuum tube technology in 2026. Although semiconductor technology ultimately dominated the electronics market, nuvistors offer distinct advantages such as immunity to electrostatic discharge and electromagnetic interference. The project highlights the trade-offs of using nuvistors, including a significant power draw of 7.5 watts for the heater supply and a lack of miniaturization potential compared to modern transistors.
- ▪Nuvistors were widely used in small-signal radio frequency applications and space probes until the early 1970s.
- ▪The constructed 555 timer circuit required additional pins for the heater supply, which consumes approximately 7.5 watts of power.
- ▪Nuvistors provide practical immunity to electrostatic discharge, electromagnetic interference, and electromagnetic pulses.
- ▪The project is referred to as a 'hollow-state 555 timer' and functions similarly to semiconductor versions despite its larger size and power cost.
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| Canonical URL | https://hackaday.com/2026/09/11/making-a-neo-nuvistor-project-in-2026/ |
| Publication time | Fri, 11 Sep 2026 20:00:22 +0000 |
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Making A Neo Nuvistor Project In 2026 No comments by: Maya Posch September 11, 2026 Title: Copy Short Link: Copy For a little while vacuum tubes and semiconductors were fighting a heated battle for dominance, with bipolar junction transistors and 1959’s RCA Nuvistor both allowing you to build a compact circuit with relatively low power usage and no high voltages. Although we now know that semiconductor technology won out overwhelmingly, that doesn’t mean that you cannot build a brand new Nuvistor board in 2026, as [Eric Schlaepfer] AKA [TubeTimeUS] recently did.
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