Radiant power from Solid state Tesla hairpin circuit

[evostars]

great that it works. the offset makes sense.

your last scope shot shows only the negative impulse, keep in mind both polarity impulses will show up alternating, but a symmetric power supply must be used for that (earth ground in the center between + and - dc supply). ground the l1 and l2 on earth

[fejleszto]

I use symmetrical PSU.
So, I have the huge impulses, both side + and -
What is the real importance of tuning L2? I achieve maximum peak voltages at different frequencies, but it has nothing to do with L2 resonance I think...
(L3 is at the moment out of game yet)

[Floor]

@evostars

Have you considered using dual devices? i.e. The combining of the outputs from
two capacitively and magnetically separated devices.

   floor

[fejleszto]

Hi Ivo,

I have played with this "toy" a little and I must conclude that in this phase it is nothing other as a step-up dc-dc buck converter. Nice work indeed! The negative back EMF is used to create a high voltage level, but it means no added (extra) energy but only conversion with about 70-80% as I measured. There must be some other tricks to achieve the desired COP>1.

As you read it already:
"Now we cannot push power and take it at same time, the trick is only this. Then for a resonant circuit, we charge the capacitor and it discharge into his coil. Trick is to discharge the capacitor when he reach his full voltage and power the load, charge and discharge cycle, give take exchange in balance... Also power can be extracted by differential output coil, this mean half is CW and other is CCW, source in the middle. One side is grounded and other side is connected to a capacitor. The primary can be moved to tune the system to get the best COP."

So, I suspect we need to construct another switching circuit to replacing of the output spark gap!

Another consideration is to calculate with the wave impedances of the coils, namely the lenght of the coil wires to avoid unwanted wave reflections. It can be necessary to apply an isolated litz wire (all thinny wires extra isolated in the cable) to avoid the skin-effect at higher frequencies, but it is a detail to increase efficiency farther. 

I hope I could help you! Keep going on!

[NdaClouDzzz]

The negative back EMF is used to create a high voltage level, but it means no added (extra) energy but only conversion with about 70-80% as I measured. There must be some other tricks to achieve the desired COP>1

There is. But you must first start thinking in terms of intensity rather than quantity.