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There were working Apple Chromatron CRTs demonstrated in the 50s, but they never could figure out how to to manufacture them with acceptible yield. Even Sony who actually mass produced that design prior to arriving at the Trinitron, had yield that was close to 50% defective.
It's not implausible that at the same time the 15GP22 was being developed there was a 21" CRT in the works, but it had a worse yield and didn't get produced. RCA spent $6M in 50's money to develop the 15G and other companies like CBS made it woefully obsolete in a few months of production...I'm not sure if you would call that world leading development or getting a workable solution through brute economic force.
Last edited by Electronic M; 06-06-2021 at 05:15 PM.
Reason: auto correct sucks.
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