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)
Cathode current density
(Dk)
Heater resistance (R)
Heater current (If)
Min
170*
10*
3.8
285
Max
-
-
4.1
315
1060
20
Unit
mA
Tk=1050擄C
A/cm
ohm
mA
擄C
uA
2
Test condition
25擄C
Tk=1050擄C
Ef=6.3V
Ef=6.3V
Ehk=+200/-200V
Cathode temperature (Tk) 1020
Leak current between
cathode and heater(Ihk)
-
* These values may be changed by assembling structure of electron gun anode.
Rev.1
New Japan Radio Co., Ltd.
1
2
