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Author Topic: HIGH QUALITY TPU DVD Video Released from Jack Durban  (Read 391727 times)

Offline Feynman

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #645 on: May 01, 2008, 05:16:52 PM »
@EM

Nice FFT!  I'm amazed that those bands show up so clearly.   One thing -- if we are saying device operates by Schumann resonance, you'd expect to see an octave harmonic at 3.9936 kHz.  But such a harmonic appears to be absent...

Also, do you have the raw data so we can calculate the exact frequency of those bands?

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turbo

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #646 on: May 01, 2008, 05:36:14 PM »
Here are mine.
I made them last year.
There are more sequences in the start up of the coil.
As you can see there is a lot of activity in the 5500 Hz range aswell as in the 16000 Hz range which is close to the television oscillator.
I did also make a spectrum chart but i'm unable to locate that at the moment.

M.

Offline aleks

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #647 on: May 01, 2008, 06:19:40 PM »
I don't think these are as large as the ones in the TPUs but similar.

Still looking. Take care.

nap

ps I'm not sure if he used these for timing or if he used these for their intended purpose and used them for cleaning up the output.
502-1 or 502-7 are worth trying. (well, if my theories are worthy at all ;) the latest find by GK suggests to build a PMH device and build everything around it.

However, what is also important in case of sharp gradients is that attenuation frequency response of the core approaches 0 dB at high frequencies:
(http://www.wcmagnetics.com/images/data/502.gif)

This is a pretty interesting fact when trying to describe function of pulser from theoretic standpoint. While each pulse creates oscillation of low-frequency within core, the very high frequencies pass the core straight, so basically sharpness of pulse front is only partially affected by the core. This means that speculations about core "absorbing" the sharp gradient are only partially corrent. If pulse's rise time is 10ns, the largest part of EM energy will be carried unattenuated.
« Last Edit: May 01, 2008, 06:42:21 PM by aleks »

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #647 on: May 01, 2008, 06:19:40 PM »
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Offline Grumpy

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #648 on: May 01, 2008, 06:52:21 PM »
As i recall he said it Won't work in a small metal box...

M.

When/where did he say this and was it in reference to a ferromagnetic box or any metal?

Offline aleks

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #649 on: May 01, 2008, 06:55:06 PM »
As you can see there is a lot of activity in the 5500 Hz range aswell as in the 16000 Hz range which is close to the television oscillator.
I did also make a spectrum chart but i'm unable to locate that at the moment.
Judging from the image, 16200 Hz to be more exact - that's exactly the third harmonic of 5400 Hz, which suggest some "symmetric" oscillation is taking place. This may well be square wave pulses at 5400 Hz. Well, since there is energy around 11kHz, some trace of saw-tooth oscillation is also present (though, it is not major).

On image posted by EMdevices the three spectral traces could be created by 3.2kHz sine-wave oscillation heterodyned by/with 200 Hz sine-wave.

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #649 on: May 01, 2008, 06:55:06 PM »
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Offline Feynman

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #650 on: May 01, 2008, 08:05:56 PM »
@aleks
Can you explain how you are differentiating between square, saw, and sine on the Fourier Transforms?

@marco
Thanks for the info   ;)

@FT'ers
this was a great idea, really damn clever

@all
Anyone got a good copy of the raw video from which these FTs were determined? 




Offline EMdevices

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #651 on: May 01, 2008, 08:25:35 PM »
Feynmen,  did you not download the DVD that Jack provided?   In that previous post I included the frame that shows where the sounds get produced (right as he activates the tpu by inserting a magnet inside of it)  You can also hear the same sound in the low resolution videos available online at google, youtube, etc.. 

I don't have any "raw data" as in exported numbers,  I just exported the audio clip to a wave file (using Ulead), and played it with the spectrum program.   Do you want the short wave file?  I can posted when I get home if you're interested. 

EM

P.S.  @Marco,   I not sure what you're looking at there, but there is no frequency content in the buzzing above 5 kHz,  there is however a continuous 12 kHz and 17 kHz  (approx)   frequency that I see, which is not part of the buzzing sound, so I condensed the chart to the frequencies you see.   I'll have to analyze the old video sounds, maybe they're different, which would mean distortion  introduced due to resampling to a lower bit rate perhaps.

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #651 on: May 01, 2008, 08:25:35 PM »
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Offline Feynman

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #652 on: May 01, 2008, 08:29:39 PM »
Didn't realize this was in Jacks' video.  I'll check when I get home tonite to see if I can also do FT.  Thanks  :)

Offline aleks

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #653 on: May 01, 2008, 10:06:40 PM »
Can you explain how you are differentiating between square, saw, and sine on the Fourier Transforms?
Sine wave is a single spectral component, without obvious connection to other frequencies. Obvious connections are: equally-spaced side bands and harmonic multiplies.
Square wave consists of odd (1,3,5,7,etc) harmonics.
Saw-tooth waves consists of all (1,2,3,4,5,6) harmonics.

Of course, knowing phase of harmonics is also important to make any final judgement. Unfortunately, spectral power plots do not give any information about harmonics phase.

By the way, the image EMdevices posted is actually looking like 100Hz square wave oscillator with 3.2kHz square wave oscillator running together, because I can see 200 Hz spaced traces throughout the spectrum. Another possibility is that 3.2kHz (or 3.5kHz) is not a square wave signal, but some kind of resonant frequency of the system. If this is really a 3.5kHz square wave frequency, I do not see its higher components. On the other hand, it may be a 1.1kHz saw-tooth (or 550 Hz square) wave: you can can clearly see 2.2, 3.3 and 4.4kHz traces (around these), with a pretty expected intensity progression.

Well, without knowing fundamental frequency it's easy to mix square wave and saw-tooth wave. Common "power line" buzz can be modeled both with high-passed square wave and saw-tooth wave.
« Last Edit: May 01, 2008, 10:37:05 PM by aleks »

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #653 on: May 01, 2008, 10:06:40 PM »
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Offline aleks

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #654 on: May 01, 2008, 10:35:36 PM »
octave harmonic at 3.9936 kHz.
It's won't be an 'octave harmonic', it will be a 500th overtone. :) 500*7.8...

Offline Feynman

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #655 on: May 01, 2008, 10:55:24 PM »
i do not think that is correct. (calc must be done w/ powers of two)

fB : base frequency 
fH : harmonic frequency
M : Multiple
O : Octave

fB = 7.8hz
fH = 3,993.6hz

M = fH / fB
M = 3993.6hz / 7.8hz
M = 512

Harmonic is 512x multiple of the base.

How many octaves up is this harmonic?
2^x = fH / fB = M
x = log2(fH/fB)
x = log2(512)
x = ln(512)/ln(2)
x = 9

fH is nine octaves above fB.   

aka
7.8 * (2^n) will give "octaves", where n = octave


PS
thanks for info on sine/square/saw FT differences

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #655 on: May 01, 2008, 10:55:24 PM »
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Offline aleks

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #656 on: May 01, 2008, 11:09:34 PM »
aka
7.8 * (2^n) will give "octaves", where n = octave
Well, OK, you are right in this sense. However, physically it is much irrelevant since physical processes deal with harmonics mainly.

turbo

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #657 on: May 01, 2008, 11:11:56 PM »

P.S.  @Marco,   I not sure what you're looking at there, but there is no frequency content in the buzzing above 5 kHz,  there is however a continuous 12 kHz and 17 kHz  (approx)   frequency that I see, which is not part of the buzzing sound, so I condensed the chart to the frequencies you see.   I'll have to analyze the old video sounds, maybe they're different, which would mean distortion  introduced due to resampling to a lower bit rate perhaps.


EM

I know what i analyzed.
The images are a crystal clear representation of the sounds made by the coils.
I do remember analyzing more then one take from diffrent coils and i am not shure which one you analyzed.
Steven stated in one of his video's the coil was running close to 5500 hertz which match the spectral graph quite perfect.
These signals are so clear and so close that it cannot be distortion.

I like the idea Aleks presented about the square wave and the harmonics.

If i can find some spare time i will fire up the gear i used to analyze the video's once again and note the time stamps so we can compare our findings.

M.

Offline EMdevices

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #658 on: May 02, 2008, 12:18:49 AM »
oh,  so you might have analyzed sound from other sections, interesting.   I thought it was only the mini TPU that buzzed.

nice deduction there aleks, 

EM
« Last Edit: May 02, 2008, 01:56:01 AM by EMdevices »

Offline EMdevices

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Re: HIGH QUALITY TPU DVD Video Released from Jack Durban
« Reply #659 on: May 02, 2008, 02:49:13 AM »
back side view,  notice the double strand is clearly visible, AND the winding direction  :)

EM

 

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