Comment by st_goliath

> How feasible is it to make a crt from parts? [...] I've never seen a DIY CRT kit before.

The closest thing that springs to mind: A friend of mine once drilled a hole into an empty Vodka bottle, stuck two wires in it (one at each end), a hose adapter for a vacuum pump, "sealed" the whole thing with a hot glue gun and hooked it up to several scavenged microwave oven transformers in series. Yes, the output was rectified and capacitors were also involved.

Here are some pictures:

https://chaos.social/@itsyndikat/107846783094589995

IIRC what he wanted to do was plasma etching.

I suppose rearranging the electrodes (using a piece of sheet metal with a hole in it; both fed through the neck of the bottle) and wrapping the sides of the bottle with 4 strips of aluminium foil could get you a beam and some crude deflection control. Not sure tough what you would coat the end of the bottle with, but I guess vacuum coating would be applicable.

If that sounds absolutely insane to you, I'd wholeheartedly agree.

At least to my ears, trying to build a CRT from first principles, combined with learning-by-doing and learning-EE-from-youtube-tutorials, sounds like a fast path to end up either dead or in a permanent care facility. Not exactly something I'd hand out in beginner-friendly kit form.