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When I started at Motorola out of school in 1966, I inherited a project that used a half-gallon milk bottle as a CRT. The body of the bottle was cut down to make the CRT shorter, but it used the flat bottom as the screen and the funnel-shaped part as the neck. This project was an attempt by the previous engineer (who unfortunately died a few months earlier at the age of 36 from a brain aneurism) to cut a transistor set down to the bare minimum. It had a lot of really not-production-friendly circuits that worked with the parts he selected, but probably would have a large reject rate on the assembly line. The whole thing was built by soldering parts to a large sheet of tin-plated steel - a technique commonly used for small developmental circuits at the time, but not for a whole TV! I wish I had a picture of that set.
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