Kapanadze Cousin - DALLY FREE ENERGY

[verpies]

The AC or DC doesn't matter on main signal as long as you follow same principles. In most cases it is AC with other signal following polarity.

Well, if you mention the NMR simulation at  http://www.drcmr.dk/JavaCompass/ ,
it would be prudent to maintain a strict analogy to it.

Wasabi correctly noticed that this simulation shows a unidirectional and constant strong vertical magnetic field, but the Dally device does not have any constant fields, does it?

Alas!, I don't think it even has a unidirectional field.

[Vasiliy Buslaev]

Hi everyone

If you allow a small, but I think an important point.
Pay attention to the quality of mounting scheme nanopulser.
At a high frequencies and short pulses, it is necessary to take steps to eliminate spurious emissions on the momentum,  parasitic generating, etc.

@ itsu.  this design board is not suitable for such devices. Need use the board with a continuous conductive ground.
After installation of the transistor and diode DSRDs, the scheme may bad work.
I usually use a workpiece from FR-4 material. Use a sharp knife-cutter. I cut with a knife by a metal ruler. I has long been using this method for modeling boards RF and microwave range.
For a high frequency or very short pulses, such assembling on the standard boards is not suitable.
However, you done that even in this version is still working.
It would  be desirable to have everything worked reliably, for yours version of replication. 
You every success!

Regards
Vasiliy

[itsu]

Thanks  Vasiliy,

when i am done experimenting with this setup, i will build a new pulser following your advices.
It would be nice to see the difference in signals.

Concerning the permeability of the small toroid, i followed your formula in post #236, and i made the calculations with the inductance in uH and the dimensions in mm, is that the way to do it?

See video i made of that here: http://www.youtube.com/watch?v=4pCmJMAjLHg&feature=youtu.be

Regards Itsu

[verpies]

Concerning the permeability of the small toroid, i followed your formula in post #236, and i made the calculations with the inductance in uH and the dimensions in mm, is that the way to do it?

See video i made of that here: http://www.youtube.com/watch?v=4pCmJMAjLHg&feature=youtu.be

An air web with very short leads or a construction over a copper laminate ground is a good advice for circuits operating at ns or GHz.

Regarding your permeability measurements - they are OK, but that's not everything.  You still do not know the saturation points of your toroids.

To measure it, wind two CW layers of one winding with 1-2mm dia. wire (the second layer advancing in the opposite direction along the outer circumference of the toroid) and apply very short pulses (green) at high frequency to this winding using one of your power MOSFETs, driven by your TL494 circuit, while measuring the drain current through a 0.1Ω current sensing resistor.

These current pulses should be sawtooth shaped (blue), however as you start gradually decreasing the frequency the TL494 (or increasing its pulse width (purple) ), the sawtooth tips will start curving up on your scope (red).
Note the instantaneous current when this distortion happens, divide it by the number of turns in the winding and by the circumference of the toroid, and you will have the saturation point of the ferrite.

P.S.
If your pulse tops start flattening out (instead of curving up), that means that you are reaching the V/R limit, e.g. you current sensing resistor has too much resistance or your supply voltage is too low or you don't have enough turns.

[Vasiliy Buslaev]

Hi Itsu

I forgot to specify the size in mm.
However, in inches, this formula has to work well also. It is easy to compare, translated sizes from mm to inch sizes. The result should be one and the same.
The fact that you have a frequency of 243 Hz, it is even better and more accurate measurements. 25 years ago in my old job was an old measuring bridge RСL, this device did made measuring at a frequency of 100 Hz.
Itsu, those rings that are coated with enamel, may be not ferrite.
It can be a ring of permalloy based powder.
This ring is very difficult to introduce into saturation. In addition, when measuring the size of the ring, it is necessary to take into account the thickness of the enamel.
It is better to use pure ferrite, without enamel. The ring should be of small size, for easier to introduce into saturation.

@verpies, I agree with you completely (post #293). I think in the scheme of Dally achieved current through the coil, obviously a great level that is guaranteed to create core saturation.

Regards
Vasiliy