I made a write up on how to emulate on a CRT in this thread here: My Experience emulating to my CRT
Basically you use a modified driver with a somewhat older AMD GPU, some Nvidia GPUs can also do this but I couldn’t get my GTX 980 to do it when I tried and decided to just add the AMD in with it and I had an easier time with that so ymmv, then with the right hardware which I have linked to in the thread (make sure to read the entire thread btw, the VGA to Component adapter I linked to is good, the problem I was having with it seems to be specific to me because I have a bad ground loop problem) you can send a 15khz signal to your CRT in any resolution the TV supports once you get used to the software. PM me if you have any questions on where to get started though.