The Radio Shack #276-048 is a cold cathode side viewing numerical indicator tube. It displays the numerals 0 through 9 and has two internal, independently operable decimal points located to the left and right of the numeral. The desired current is lit when its corresponding cathode is energized. The color of the display is neon red. The brightness of the numerical indicator is dependent upon cathode current, and the horizontal viewing angle is 100 degrees.
The Nixie tube has been designed to operate in strobed/time sharing applications. In a typical application, "same numeral" cathodes, (e.g., all 1's, all 2's etc.) of all tubes are connected in parallel and the anodes are strobed sequentially.

The datasheet contains a pinout and an example circuit.

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Updated March 28, 2004