yeah, I figured that worst come to, I'll have a high voltage supply for doing plasma experiments

I don't get where you're getting a "doubling" from though.

Also it's not fair that I'm talking about a real capacitor with real, known values, a Layden jar, and you're talking about a tiny, weak plate capacitor.

These machines get used with 1 nF capacitors, not femtofarad plate capacitors.

You're essentially saying that the capacitors that I watched him make don't exist or aren't hooked up to the system. But he shows what that looks like too. When he disconnects the capacitors they spark more frequently a and they are barely visible on video.

Watch the videos, that's not a tiny little plate capacitor, that's a proper Layden jar. Pint (the measurement) sized Layden jars are rated at 1 nF.

But Layden jars can be in the tens of nanoFarads.

I'm not talking about a hypothetical machine it a real machine with real Layden jars.

yeah, I figured that worst come to, I'll have a high voltage supply for doing plasma experiments