100W OU Radiant Energy Circuit

[weighta]

Nice setup.

The coil I'm using is from an old (30 years) power cable that has two wires which are not twisted. A spool of speaker cable would be a similar thing. It has mass which is important, because Tesla said that his experiments had better results when there was more mass (in terms of wire size). I still think that coils like yours and mine can provide much more than we are currently seeing.

As for the skin effect: Tesla said that this happens mostly at high frequencies which we are not employing in those setups. What is interesting to me is that I can't produce back-EMF from such coils at higher frequencies. I've managed to get some at a few kilocycles, but not faster. There are spikes at higher frequencies, but they are much smaller and I don't know if they produce any gain.

Correct. Higher frequencies aren't this circuit's cup of tea. One of the reasons is because you can't fully magnetize the coil in a shorter amount of time, so the spikes are smaller.

There is a balance between the frequency/duty cycle so you are drawing the smallest amount of current while still keeping the spikes high.

Resonance is also a question that comes to mind, but I have it figured out. If you take 22uF and the inductance of your telephone spool (my case 18mH), you get about 250Hz. My dumps are fastest at 500Hz, but that's probably because I have a ten dollar inductance meter.

Here's a quick cap dump circuit demo I did with the coil showing resonance at the right resonance frequency.