The development of low heater power cathode assembly for cathode ray tubes will be described. This cathode is designed to operate from a 1.5 volt supply with a power consumption of less than

watt. Construction features of the assembly will be explained in detail and a brief outline made of the operational steps of assembly. Emission and power characteristic curves will be shown and discussed. A specialized cathode ray tube, type SC-2751, was developed to incorporate the advantages of this cathode assembly. The novel engineering features incorporated in this tube design will be described and performance data shown.