lot of set six tubes IN-16
- Tubes for DIY Tubes was made by military plant in Ukraine (former USSR). The same date code! "OTK" marking, indicates premium military grade tubes!
SPECIFICATIONS:
Tube diameter, mm 13
Tube Height, mm 45, approx including glass nipple
Digit Height, mm 13
Brightness >150cd/m^2
Angle of visibility >90 deg
Power supply voltage >190 V
Discharge appearance voltage <170 V
Discharge voltage <115 V
Life time >7500 hours