CRTs could push 3200x2400 but the masks weren't able to resolve it. Monochrome CRT's had theoretically infinite resolution.jorimt wrote: ↑03 Jan 2021, 10:07
I'm no CRT expert, but I'm pretty sure the CRT resolution increases you're referring to were only possible in a certain context, and when such progressive resolutions were tried at higher refresh rates, you'd run into physically undefeatable issues.
See sources such as:
https://www.quora.com/Could-we-have-mad ... n-Van-Duyn
There were some CRT Projectors with enough of a high scanrate to push 4K too and those had no masks(since they were not projectors) so they didn't have the mask issue but they were still limited compared to Monochrome.
While we're linking stuff I came across this post https://www.avsforum.com/threads/4k-crt ... t-60214784