The glass envelopes of the cathode-ray tubes were carefully cut from the sockets, and the guts of the tubes were discarded to make room for the replacement circuit, which lives on two PCBs.

If you’re old enough to remember Cathode Ray Tube (CRT) Televisions, you probably remember that Sony sold the top products. Their Trinitron tubes always made the best TVs and Computer Monitors.

The electrolyte solution can vary across the system or locally. Galvanic cells are important in batteries, electroplating, and corrosion. Cathodes emit electrons in sputtering systems, cathode ray ...