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--- | ||
date: 2024-12-08 | ||
title: Rodan GR-211/CD94 | ||
categories: | ||
- nixie | ||
tags: | ||
- Rodan | ||
- side-view | ||
--- | ||
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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." | ||
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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. | ||
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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. | ||
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### Key Specifications | ||
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| Property | Description | | ||
|-------------------|-------------| | ||
| Manufacturer | Rodan | | ||
| Time period | ? | | ||
| Digit height | 35mm | | ||
| Envelope diameter | 30mm | | ||
| Envelope height | ~78mm | | ||
| Base diameter | 32mm | | ||
| Socket | TSP-14B | | ||
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### References | ||
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- [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)) | ||
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- [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)) | ||
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- [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/)) | ||
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- [swissnixie.com](https://www.swissnixie.com/tubes/GR211/) ([Archive](https://web.archive.org/web/20240424051850/https://www.swissnixie.com/tubes/GR211/)) | ||
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[![Rodan GR-211/CD94](assets/1.jpg)](assets/1.jpg) | ||
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[![Rodan GR-211/CD94](assets/2.jpg)](assets/2.jpg) | ||
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[![Rodan GR-211/CD94](assets/3.jpg)](assets/3.jpg) | ||
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[![Rodan GR-211/CD94](assets/4.jpg)](assets/4.jpg) | ||
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[![Rodan GR-211/CD94](assets/5.jpg)](assets/5.jpg) | ||
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[![Rodan GR-211/CD94](assets/16.jpg)](assets/16.jpg) | ||
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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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