Gazotron IN-18

With its 40mm digits, the IN-18 (&ldquo;NH-18&rdquo;) is the largest Nixie tube mass-manufactured in the Soviet Union. It shares the same envelope diameter with smaller Nixie tubes, such as the ZM1040 and Z566M , which gives the IN-18&rsquo;s digits a slightly elongated appearance. Today, the IN-18 is among the most popular Nixie tubes, often used in large Nixie clocks. Although vast quantities…