Is this safe? How many kV is on the CRT?
For a monochrome display of that size, probably around 20kV
> Is this safe?
Just don't stick your fingers in there while it's on.
Given that this guy built the entire thing, he clearly has enough knowledge on electronics to understand the dangers of the flyback transformer.
Isn't there a design principle that says that if you make something look cute, it should also be safe to touch?
I think this does not work. My one cat looks very cute but is not really safe to touch.
Now, if you open up an old TV, what you REALLY need to watch out for are the big capacitors in the power supply. Those may be only the voltage of your power grid, but hold enough charge to power the whole TV for several milliseconds. On a 28”, that’s enough to kill you dead. Luckily the leads on those caps are not exposed unless you disassemble the TV (removing the PSU PCB).
The leads might be connected to other parts of a PCB which may be exposed.