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add Rodan GR-211/CD94
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oskar2517 committed Dec 8, 2024
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106 changes: 106 additions & 0 deletions content/nixie/Rodan-GR-211/index.md
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---
date: 2024-12-08
title: Rodan GR-211/CD94
categories:
- nixie
tags:
- Rodan
- side-view
---

The GR-211 is a large Nixie tube produced by Rodan-Okaya in Japan. It ranks as the third-largest Nixie tube made by Rodan and succeeded the short-lived GR-11. Later models were rebranded as CD94. Notably, the GR-211 includes a left decimal point, which is uncommon for tubes of its size. In devices using larger Nixie tubes, a separate neon bulb typically represented the comma instead. Interestingly, the datasheet marks the decimal point's pin as "not connected."

Like most Rodan-manufactured Nixie tubes, the GR-211 features an unusually intricate design and the distinctive, warm glow characteristic of their tubes. Its aesthetic appeal is further enhanced by a chromium-plated base and the golden sticker, typical of Japanese tubes.

Originally, the GR-211 came packaged with a compatible socket in its box. Unfortunately, my unit is missing both the box and the included socket.

### Key Specifications

| Property | Description |
|-------------------|-------------|
| Manufacturer | Rodan |
| Time period | ? |
| Digit height | 35mm |
| Envelope diameter | 30mm |
| Envelope height | ~78mm |
| Base diameter | 32mm |
| Socket | TSP-14B |

### References

- [Rodan GR-211 datasheet](https://www.tube-tester.com/sites/nixie/dat_arch/Rodan_02.pdf) ([Archive](https://web.archive.org/web/20240615172130/http://www.tube-tester.com/sites/nixie/dat_arch/Rodan_02.pdf))

- [jb-electronics.de](http://www.jb-electronics.de/html/elektronik/nixies/n_cd94.htm) ([Archive](https://web.archive.org/web/20240421194558/http://www.jb-electronics.de/html/elektronik/nixies/n_cd94.htm))

- [nixies.us](https://www.nixies.us/bwg_gallery/gr-211/) ([Archive](https://web.archive.org/web/20240714195657/https://www.nixies.us/bwg_gallery/gr-211/))

- [swissnixie.com](https://www.swissnixie.com/tubes/GR211/) ([Archive](https://web.archive.org/web/20240424051850/https://www.swissnixie.com/tubes/GR211/))

[![Rodan GR-211/CD94](assets/1.jpg)](assets/1.jpg)

[![Rodan GR-211/CD94](assets/2.jpg)](assets/2.jpg)

[![Rodan GR-211/CD94](assets/3.jpg)](assets/3.jpg)

[![Rodan GR-211/CD94](assets/4.jpg)](assets/4.jpg)

[![Rodan GR-211/CD94](assets/5.jpg)](assets/5.jpg)

[![Rodan GR-211/CD94](assets/16.jpg)](assets/16.jpg)

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1 change: 1 addition & 0 deletions static/collection.txt
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Nixies:
- 1x GI-10 (Inditron)
- 1x GR-211/CD94
- 2x IN-1
- 3x IN-14
- 1x IN-19A
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