The CD28 is a small end view nixie tube made by Rodan-Okaya of Japan. It is unusual in several respects. First it has a side-nipple rather than one on the base. Second it has a unique pin arrangement – the TSM-13P.

Digit size 12mm
Average current 1.8mA
Base TSM-13P

There are several tubes in the same family – the GR-707 and the GR-772



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