NJK1120 High Current Density Small Dispenser Cathode ---- Features ---l Stable emission: Cathode current 170mA (Dk=10A/Square Centimeters) at Cathode temperature 1050 degree centigrade brightness. l Long life: Stable operation more than 10000 hours with more than 95% of original cathode current. l Stable operation after exposed to the air repeatably. l Improved to suppress excessive Ba evaporation. ---- Applications ---l High brightness and high resolution display cathode ray tube (CRT). l Electronic heating l Other special purpose tubes. ---- Specification ---Item Cathode current (Ik) Min Max Unit 170* - mA Test condition Tk=1050°C Cathode current density (Dk) 10* - A/cm Heater resistance (R) 3.8 4.1 ohm 25°C Heater current (If) 285 315 mA Tk=1050°C Cathode temperature (Tk) 1020 1060 °C Ef=6.3V 20 uA Ef=6.3V Ehk=+200/-200V Leak current between cathode and heater(Ihk) - 2 * These values may be changed by assembling structure of electron gun anode. Rev.1 New Japan Radio Co., Ltd. New Japan Radio Co., Ltd.