Valvo E1T SQ Decade Counter Tube in Original Box
One of many technologies that predates Nixie tubes, these tiny CRT-like decade counter tubes toggle the position of a brightly lit blue/green rectangle from one digit to the next with a serial pulse input. They were used in some early lab counters, and are visually very attractive when lit.
One of many technologies that predates Nixie tubes, these tiny CRT-like decade counter tubes toggle the position of a brightly lit blue/green rectangle from one digit to the next with a serial pulse input. They were used in some early lab counters, and are visually very attractive when lit.
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