Molamu o hloekileng oa tungsten / tungsten bar hangata e sebelisoa ho etsa cathode e emitting, lever ea mocheso o phahameng, tšehetso, lead, nale ea khatiso le mefuta eohle ea li-electrode le heater ea quartz.
Letlapa le hloekileng la tungsten le sebelisoa haholo ho etsa mohloli oa leseli la motlakase le likarolo tsa vacuum tsa motlakase, liketsoana, li-heatshield le 'mele ea mocheso ka seboping sa mocheso o phahameng.