Quote from: verpies on November 05, 2013, 04:44:07 PM
Before Morpheus gets you, please let me know what is the inner circumference and the outer circumference of your ferrite core when the two halves are tightly pressed together.
I need this to estimate how long it takes for the acoustic wave to travel around the circumference of the core.  This might explain the kHz frequency.

Yes, I saw the phase offset between the input and the output.  Am I correct in assuming that this was done with two piezos (one in each gap) ?
Anyway, I'd like to know the exact magnitude of this offset (in nanoseconds) for my speed of sound calculations. 
The scope was too far away for me to see the setting of the horizontal timebase and the magnitude of the phase offset.

Also, I'd like to know how the core gap influences the inductance of the largest winding and the frequencies at which the acoustic peak amplitudes happen.
"How" means that I'd like to see a table of inductances and frequencies (listing of core gap measurements in mm is optional). 
This data will allow me to analyze the important relationships of key effects in the core, such as magnetic flux density vs. the acoustic resonance frequency.


P.S.
What are the specs of that 40W amplifier?
Please put some cheap narrow ceramic disk magnets in the gaps between core halves and repeat the measurements.
Please don't use NdFeB, SmCo or AlNiCo magnets because they are electrically conductive and this allows eddy currents to develop - we don't need yet another variable to account for.

Dear Verpies.

The core measures 60 mm by 60mm outside square. Inside measures 30mm by 35mm.

The phase offset was 3.75 micro second at 66 KHz. But no, the offset was measured between the output coil Ch1 and the Amplifier output Ch2.

The rest is attached below I hope you can read my scrawl !! 

Amplifier Kemo.

Specifications:             
Output:  maximum 40W music power           
Operating voltage:  6-16Vdc           
Loudspeaker connection:  4-8Ω           
Frequency response:  approx. 20-25,000 Hz    This is an understatement I can still see a usable signal at 1 MHz !!

Now very willingly to Morpheus!! 

Cheers Grum.

Quote from: Grumage on November 05, 2013, 06:19:53 PM
The core measures 60 mm by 60mm outside square. Inside measures 30mm by 35mm.
...at 66 KHz.

That makes sense. The average circumference of the core is 185mm, thus assuming the speed of sound in the ferrite to be 6100m/s we obtain that it takes 30.3μs to travel the entire circumference of the whole core (because 0.185/6100=0.0000303).
Thus for half of the core, it takes the sound 15.16μs to reach from one gap to the other. By inverting that time, we can see that in 1s the sound can make 65945 such trips and that means 65.9kHz (because 1 / 15.16μs = 65.9kHz). 
Pretty close to your measurements, huh?

Quote from: Grumage on November 05, 2013, 06:19:53 PM
The phase offset was 3.75 micro second...
But no, the offset was measured between the output coil Ch1 and the Amplifier output Ch2.

That does not make sense. From one piezo to the other the phase shift should be close to that 15μs half way time.
...but then, that's not surprising because you are not measuring between two piezos.

Also, because you are not measuring with short rectangular nanopulses occurring at low pulse repetition frequency (PRF), you are unable to distinguish between 1.2 cycles and 0.2 cycles with a scope.
So please repeat that measurement with two piezos (one in each gap) and narrow pulses occurring at low PRF.

Notice that the resonant frequencies that you have listed are the odd sub-harmonics of 66kHz.
Odd sub-harmonics suggest a square wave or destructive interference of even harmonics between the halves.  See this.

-15^th    4.4kHz
-13^th    5.1kHz
-11^th    6kHz
-9^th      7.3kHz
-7^th      9.4kHz
-5^th      13.2kHz
-3^rd      22kHz
Fund.   66kHz
+3^rd    198kHz   (not listed but should occur)
+5^th    330kHz   (not listed but should occur)   

Thus, optimally your primary LC frequency should be ½ of 66kHz, which means 33kHz.
You can adjust that LC frequency with the capacitor connected across the primary winding and with the load across the secondary ( this is a Load Controlled Oscillator, after all )

Morpheus has claimed me, so I did not check for the common "off by x2" error, which could mean that LCRF = 16.5kHz.

Hi All ,

@ Grum:
Thnx for the recent uploaded vid :p, very valuable information there and discovery of the Flyback 2split core
as I see it Reacts to different Frequency measurements for the resonance. With the Idea of the Piezo disk also makes something out of it, shows even that the core reacts distance or certain aire gaps. But the aire gaps I knew already some time, plays a big role with output .
Gives me more idea what I should try now, Add a HV spark gap within one half of the core and see what it does with the ouput .
You and Verpies are inspirational here now with the thoughts on Flyback piece studies, this is what i was looking for, collaborating on this.
great

@ MenofFather:

Nice demonstrations of lighting, but can we see the this on a schematic to know what you have done ? I really would like to know
Thnx for giving measurements.

Cheerz ~

Output 230V lamp:

I think we would use higher input voltage and lower amps for better efficiency.
230V AC->324V dc in cap pack-> free energy machine-> graetz-> back to the caps.
If the voltage higher in cap pack, we get more energy than input.

The average 12V-220V 300W inverter gives 0,3-0,4A consumption without load, and 70-80% efficiency with normal load.

Quote from: Grumage on November 05, 2013, 06:19:53 PM
Dear Verpies.
The core measures 60 mm by 60mm outside square. Inside measures 30mm by 35mm.
The phase offset was 3.75 micro second at 66 KHz. B
Cheers Grum.

Hello Grum,
Nice video and great experimentation there. keep "collaborating" with Verpies as he very thorough and insightful.

@Verpies,
I loved that analysis cheers,