one of the major problems comes from the fact that to have this state, it is necessary to be super precise so that the parameters are linked.
as a major obstacle also (in the realization), the transformer (multi-wound toroidal coil) and the "charge pumping" circuit or tesla switch (patent used by Meyer).
an oscilloscope may be necessary to achieve a good adjustment.
an overall operating frequency could be 20 to 50 KHz. the higher the operating frequency, the less there will be turns in the transformer, on the other hand in the secondary; it will require a rectifier diode capable of withstanding current and frequency, as well as a large reverse voltage due to the resonant circuit.
for the transformer, firstly, for a test, a simple transformer of energy-saving lamp may be sufficient, because not being toroidal, manual winding has it simpler
to determine the number of turns required, there are learned formulas whose content I do not know, however, knowing that in the primary of these transformers, there is a chopper itself supplied by the sector, rectified then filtered, which gives approximately 380 V peak. it will be enough to unwind a transformer to know the number of turns per volt for optimum operation. (archaic but effective solution)
a transformer is preferable to all other solutions to achieve galavanic isolation and avoid transferring parasites due to electric arcs into the low voltage circuit.
this solution, I did not realize it myself, except the transformer part but at the time when I carried out, the torric transformers were overpriced. I was therefore satisfied with transformers with a ferro magnetic core.
..... (error of appreciation on the operation)
in the primary part, use a circuit to create a frequency generator, sinusoidal if possible to avoid parasitic radiation due to the usual square signal of many oscillators, to increase its power, an amplifier module style K4003 of 30 W (this is a 2x30W kit with sufficient bandwidth) found on
http://www.gotronic.fr/catalog/kits/kit ... teurs2.htm
the overall cost of the realization should not exceed fifty euros