Quote:
Originally Posted by MadMan
Nickel for a cathode seems easy enough, but is it plated with barium or like just painted on?
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I believe a dot of a emissive paste is applied to the nickel cathode. Once in a vacuum the cathode is heated, the CO2 (+ H2O, etc.) is removed by the pump, leaving oxides behind. If exposed to air the oxides re-combine to for carbonates again but can also be contaminated but other things.
Rebuilding a CRT is very complicated, like rebuilding a bathroom from scratch. Many different skills to get right.