METHOD FOR ASSEMBLING A BASE TO AN ELECTRON TUBE

RCA 73, 219 After an electron tube is exhausted and sealed, a base (18) is pushed into position on the stem (12) of the tube; the space between the stem and the base, at least around one pin (14) of the tube, is filled with a sealing substance; and then the stem is heated until the sealing substance is at least partially cured by heat from the stem to form a dielectric material (32).