-18)Soviet Tubes / Nixie Tube Indicator for clock / Tested, photo for example/. Power supply - not less than 200 V. Discharge occurrence - no more than 170 V.
Maintaining the discharge - no more than 150 V. When powered from a constant voltage source - from 4 mA to 7 mA. When powered by a source of pulsating voltage with a frequency of 50 Hz (average value) - from 2 mA to 4 mA.
Indication current - no more than 4 mA. The brightness of the indicator lamp IN-18 is at least 50 cd/m2. Viewing angle - not less than 90°. Operating time - not less than 5000 hours.
Cathodes - from 0 to 9 (in the form of Arabic numerals). Ready time (delay time for the occurrence of a discharge at illumination of 40 lux) - no more than 1 s. Ambient temperature - from -60°?
The height of the digits is 40 mm. Overall dimensions - 32×86 mm. Weight - no more than 35 g.