To form the cathode, the grid 7 is mounted over the spherical surface 3 and a scribing tool is inserted through each of the apertures in the grid 7 to mark its centre; the grid is removed and the concavities 6 are punched into the spherical surface after which the emissive coating is ...
To form the cathode, the grid 7 is mounted over the spherical surface 3 and a scribing tool is inserted through each of the apertures in the grid 7 to mark its centre; the grid is removed and the concavities 6 are punched into the spherical surface after which the emissive coating is ...
To form the cathode, the grid 7 is mounted over the spherical surface 3 and a scribing tool is inserted through each of the apertures in the grid 7 to mark its centre; the grid is removed and the concavities 6 are punched into the spherical surface after which the emissive coating is ...