18mm numeric tube manufactured by Reflector/Sovtek
The IN-1 is a very common 18mm digit size tube. Its broadly available in serveral online stores. The tubes body is rater massive for its digit size and the tube has a nice glass dome. Due its special size it is not very suitable for any projects that require to be small sized. The "5" on the IN-1 is a inverted 2 like in many russian nixie tubes.
|Symbol height (mm)||18|
|Starting Voltage (typ)||170 V|
|Maintaining Voltage (typ)||135 V|
|Current per Segment||3mA|
|Reccomend Resistor||12.6kOhm = 2.8mA|