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Making of Klystron Grids.

Wireless World, March, 1959.
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Klystron Grids have in the past been made from round wires formed into a mesh: this provides a poor hole-to-wire-ratio and reduces efficiency. EMI Electronics, Ltd had on show some klystron grids made by a process which gives an extremely thin section to parts of the grid at right-angles to the electron beam. Aluminium wires are given a thin coating of copper and packed into a copper tube which is then sintered to join all the copper coatings together and to the tube. The whole is sliced and the aluminium dissolved out, leaving a grid with very thin inter-cell walls.

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