Quote:
Originally Posted by ppppenguin
In the UK there were very few metal cone tubes. A few (monochrome) were made in the early 1950s, I very much doubt if degauss coils were commonplace back then.
In the US you had metal cone colour tubes in the 1950s. I presume these needed degaussing along with the shadow mask. I don't know if monochrome metal cone tubes were used in the US.
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We did have metal monochrome CRTs in the USA. They were super common almost prevalent (in larger screen sets) from around 1950-52 then they quickly fell out of favor and vanished....they had a tendency to develop leaks and having large metal surface sitting around 15kv was not terribly popular with service techs and consumers who changed their own tubes.