Symbol Tubes

Symbol tubes

CD14

Rodan-Okaya CD14 top-view symbol tube

GR-524

The GR-524 is an extremely rare symbol tube made by Rodan-Okaya. It shows the abbreviated days of the week in Kanji.

GR-574

The GR-574 is an extremely rare nixie tube made by Rodan-Okaya of Japan.

GR-707

The Rodan-Okaya GR-707. A small top-view nixie tube showing electrical symbols. Clearly intended for use in a multi-meter. This has the unusual feature of a side-nipple. The pin arrangement is also very unusual.

GR-836

The Rodan-Okaya GR-836 is a large and extremely rare top-view 'nixie' tube. It has two Japanese symbols, which as far as I can tell mean 'power' and 'on'.

GR-1485

The GR-1485 is a symbol tube made by Rodan-Okaya of Japan. It has the letters A through J

GR-43091

The GR-43091 is a symbol tube made by Rodan-Okaya of Japan. It has the letters A through J

Unknown 1

This is an unknown Rodan tube that just has the characters 'A' and 'R' in it. It uses the same envelope as the GR-201

ZM1041

The ZM1041 is a large Nixie tube that can display a plus and minus symbol. It has a red coating to improve contrast. This particular one was made by Mullard of the U.K.