Making triodes in artisanal conditions

I stumbled across a network on the site of a certain Frenchman engaged in the manufacture of workable triodes at home.
The author's page (in French) - tynts .
It is through Google translator - clack .

But the most interesting thing turned out to be in the video - the whole process, from beginning to end in 15 minutes.


')
For those who do not know what a triode is, there are explanations here .

UPD: persuaded ... Changed the name.