Kapanadze Cousin - DALLY FREE ENERGY

[TinselKoala]

   The 1.7Mhz of the Kacher must some how be in sync up with the 37.5 meter 168 turns grenade output coil, as well as with the grenade inductor (resonator) coil.
  Does any one have a signal generator, and a 168 turns, 37.5 meter grenade coil built up, that can test the self resonant frequency of the coil?

  I added some turns back onto my Kacher secondary coil. But, I still just a have 1mm spark, and no streaming.
  Here's a scope shot, using channel 2, and my 100x probe.  I count 2.9 sections?
 

So, what is the frequency shown on the scope? Please point out where you see "2.9 sections" by indicating it on the photo.

Let's try to do it properly. Do you have a calculator?

It's barely possible, in your photo, to see that the scope's horizontal timebase setting is at 1 microsecond per division.

So how much time is represented by the middle 8 divisions of the graticule? 8 microseconds? Right. That is (8 x 0.000001 sec) right?

8 divisions x 1 microsecond per division = 8 microseconds. This is the time interval you are measuring.

We don't count the leftmost and rightmost edges because of the analog distortion of the CRT display. (You have moved your whole trace to the right, though, so you have introduced some distortion just by doing that.)

Now how many peaks, or in this case valleys (negative peaks, since you have placed one negative peak right on a graticule line) are contained in that 8 microseconds? I count almost exactly 19 valleys. This is the number of full cycles you have measured during that 8 microseconds.

So if you have 19 cycles PER 8 microseconds, what is your frequency in Hz (cycles PER second) ? Get out your calculator and solve.

19 / 0.000008 = ?? 

[John.K1]

Hi TK,

I need your expertise.  I have a  cap/coil    and I need to find its resonant frequency. The same setup as we can see in Akula's video SG and Scope on one side of the coil, both grounds connected.  Sweeping frequency up to 10MHz doesn't shows some extremities. FTT shot shows some harmonics.  My question is , those harmonics are test frequency related?  at 4.5 MHz signal used the high peaks shows every 4.6MHz, and when I use 8Mhz the peaks are nicely distributed every 2Mhz . I do something wrong or I do not know to use FTT.

[TinselKoala]

hi TinselKoala,

I have already given up in trying to teach an old dog new tricks.Maybe you would have better luck with the intention help someone not to use a Mazilli circuit which i have mentioned few times before it is a pain to tune the frequency.

But i hey i stop anyone from doing any kind of repetitive experiment which they "feel" it's right.

The SG3525AN is a better PWM generator than a TL494.The source-sink is around 450mA for SG2525AN but for TL494 it's mere 200mA.

I am still wondering why PWM is a desired strategy here at all. The TL494 is a very popular chip among solid-state Tesla coil builders even today but it's seldom used as a PWM driver; rather, people use it to make the basic squarewave pulse at the desired resonant frequency, to drive a mosfet bridge ( with a proper gate driver between) which feeds the TC primary. My TinselKoil II uses this strategy very effectively. The 494 isn't able to meet the high frequency demands of a small TC though, but the genuine Texas Instruments TL494 can be made to work at much higher frequencies than it is "officially" rated for.

The SG3525 is a PWM motor controller chip, I have Arduino shields that use that chip to directly drive small motors. I even have a couple of the Velleman K8004 PWM motor driver kits that use this chip; in this service the frequency is generally chosen to match the particular motor you are driving, and then the pulse width is used to control the speed (average power) of the motor.

By far the best strategy for driving resonant circuits (imho) is to use a Phase Locked Loop like the CD4046BE as the basic oscillator, with feedback so that the oscillator "locks in" to the actual resonant frequency, or some multiple or divisor of it as determined by other logic chips, so that the system remains in the resonant state as the actual resonant frequency changes with changing loads, environments, etc. With the appropriate high current, fast, mosfet gate driver chips between the PLL and the mosfets of course. This is the strategy used in my TinselKoil IX (but with discrete transistor mosfet driver rather than a driver chip.)

If the choosen mosfet gate capacitance is below 2000nf.The SG3525AN is able to provide a nice square waveform directly to mosfet and without distortion.

Perhaps you meant "pf" not "nf" ? At the frequencies you are talking about here, it will still be better to use a mosfet driver after the pulse generator, like TC4420 for example, or a driver stage of discrete transistors, which can provide several amps of current to the mosfet Gate for clean switching.

[itsu]

(snip)

By far the best strategy for driving resonant circuits (imho) is to use a Phase Locked Loop like the CD4046BE as the basic oscillator, with feedback so that the oscillator "locks in" to the actual resonant frequency, or some multiple or divisor of it as determined by other logic chips, so that the system remains in the resonant state as the actual resonant frequency changes with changing loads, environments, etc.

Thats how Ruslan latest designs are doing it, see the (very big) diagram a few days back here:
http://overunity.com/12736/kapanadze-cousin-dally-free-energy/msg461537/#msg461537

Regards Itsu

[TinselKoala]

Hi TK,

I need your expertise.  I have a  cap/coil    and I need to find its resonant frequency. The same setup as we can see in Akula's video SG and Scope on one side of the coil, both grounds connected.  Sweeping frequency up to 10MHz doesn't shows some extremities. FTT shot shows some harmonics.  My question is , those harmonics are test frequency related?  at 4.5 MHz signal used the high peaks shows every 4.6MHz, and when I use 8Mhz the peaks are nicely distributed every 2Mhz . I do something wrong or I do not know to use FTT.

I can't see the details very well on the screenshots you've provided. I think that your FFT is probably just showing the spectral content of your test signal and you aren't picking up the actual response of your device under test yet. It is possible that your resonant frequency is higher than 10 MHz or other things may be happening as well. What are the details of your coil and capacitor?

You could try this method: take your FG and connect it to a couple of turns of wire wrapped around the coil you are testing, with a 50 ohm resistor in series. So the FG isn't actually connected to the device under test at all, it is only connected to this few turns coil around your actual device (through the 50R). Take your scope probe and connect it to a 100k or 1 meghohm resistor and connect the resistor to the top of the coil you are testing. Then sweep the frequency of the FG, looking for the changes in voltage of the signal picked up by the scope probe. When the signal peaks this will be your resonant frequency -- assuming that the frequency is in the range covered by your sweep.

Perhaps this video may be useful to you, I think it is showing the same method that you are talking about from the Akula video, but I'm not sure.
http://www.youtube.com/watch?v=alkfoX62Na0