Very cool to see, I didn't think a CRT could even work with that much gas inside it. You can see the red glowing electron beam emerging from the very primitive electron gun, and it seems to visibly reach it's focal point before it reaches the phosphor screen (unsurprising as it has no focus electrode).

https://www.youtube.com/watch?v=mOAEv-jZarM

Very cool indeed! Imagine if someone put deflection coils, and did some slow scan vector images. That neon beam moving around would bw so cool.

@LightsAreBright27
Omg yes! The effect would be enhanced with some longer persistence phosphor (and a focusing setup with either a coil permanent magnets), but yes that would look very very cool

I would like to see that displaying not only vector, but raster graphics. The glow filling the tube would look cool.

@lightsofpahrump raster would be cool, but it doesn't work well on slow scan CRTs. If you want to make the scanning rate faster, the neon beam would be moving too quick so it will become too faint to see