Vacuum Tube DIY

Sometimes it's hard to believe how things evolve so fast.
Just "recently", before the appearance of the solid-state transistor, the king of electronic was the vacuum tube triode.

Today those tubes are still widely used, from HAM radio to Hi-Fi components, and when the time comes for you to replace one of them, it can be hard to find a suitable one. That's why some people decide to make their own vacuum tube triodes.

Let's take a trip down memory lane, as we watch a french amateur radio operator creating a triode from scratch:



Just try to image how you'd stick millions of these things in a few square millimeters, as it happens with modern computer chips. :)