# The MrPreva Experiment

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admin posted this 23 March 2017

I think this is perhaps one of the most important experiments anyone could do! A huge amount of information can be learned by running this very simple experiment!

In the specific case of positive charges moving to the right and negative charges to the left, the effect of both actions is positive charge moving to the right.

Current to the right is: I = da+ / dt + da- / dt.

Negative electrons flowing to the left contribute to the current flowing to the right.

The total Current, is the Sum of the both Currents!

We see, 2.8 Amps (da+ / dt) + 2.3 Amps (da/ dt) = the shown: 5.1 Amps as Floyd Sweet told us.

We see a Negative Power Factor, where the Voltage (V) Current (I) are out of phase by a Degree, which results in a Negative Power Factor!

cos(theta)

Where theta is the Phase angle in Degrees. EG:

cos(180) =  -1

You will see there are some problems with the MrPreva Circuit, and it is explained, because, the Current (da- ) has become a Generator, or a Battery, which is the only time  Kirchhoff's Current Law does not hold in an applied situation.

Vidura posted this 14 June 2019

Hello All!

The last couple of days I have done some tests with  different coils to replicate the Mr Preva effect, using the new Switching Tool. But to my surprise the effect was not present, although I used various different coils, cores, frequencies  and capacitors. Then I hooked up the audio amplifier, feeding a pure sine wave but still nothing, a couple of times very unstable it seemed to be present, but it resulted to be  false readings due to double triggering of the scope. So I thought what is going on here, haven't I done this many times before ? The problem was that I sometimes have failed to document my experiments properly, the issue was very simple , I made the same mistake as in my first  replication intent's : A reversed connection of the coils. The reason I post this here is that maybe it can help for some to avoid to make the same mistake , and hopefully  to understand more clearly the principle of the opposing fields and Lenz' Law. Using my (mistaken) logic I connected the setup in a manner that the magnetic fields according the right hand rule opposed, BUT in the conventional current direction not 180ª out of phase! The correct polarity is that the fields must oppose when One of the coils has the opposite current direction(when the effect is present). When I corrected the polarity of course all the coils showed the effect clearly, also with the H-bridge and short square wave pulses good results as with sine AC.

For a clearer understanding of the effect just imagine a conventional transformer under load, the current in the secondary produces a magnetic field which opposes the primary field(bucking equal magnetic poles), thus the reduced impedance effect makes the primary current rise.  This is the well-known Lenz Law.

Now in the Mr Preva experiment we have to understand the timing  and how the inductors behave when potential is applied. Any inductor when a voltage potential is applied to the terminals  instantly, before current begins to flow the inductor will have an  equal and opposite voltage, which begins to decay, while the current is increasing. The smaller inductance will increase faster, and the associated changing magnetic field will induce a voltage in the second, larger inductor. Due to the winding ratio the induced  voltage will be greater than the source voltage, and will cause the current in the second inductor to flow backwards  against the source potential and return forwards thru the smaller inductor, adding to the original current. Thus the increment of current in this experiment.

For the next experiment i will post results in the "delayed conduction Thread", I want to reproduce the reversal of current with equal inductors-windings by introducing a switched delay in one of them.

Regards Vidura.

mich posted this 06 March 2019

Hi everyone, I post my replication of Preva exp. that I did a while ago.

version1

20KHz version1

100Hz version1

version2 sort of akula core

5KHz version2

30Hz version2

The circuit was powered with a frequency from 50Hz to some kHZ and I observed that:

When the frequency is below 500 HZ the impedance is almost zero so the circuit is practically a direct line.

When the frequency is above some KHz, the impedance increases and the phase displacement of the two coils increases up to 180 degrees.

another observation: there is a considerable transformation of the current on the shorter coil, this confirms the Preva theory of current amplification, and the circular path of magnetic flux in the core.

if someone can confirm what I'm writing because I've always seen replicas of the experiment with very high frequencies and not as low as the ones I used. thanks

good day to all

Chris posted this 26 March 2017

Cd_Sharp, this is excellent! Thank you for sharing!

Some very simple observations shot:

• One Globe is very much brighter than the other!
• The other Globe, although illuminated, has a lot less Current through it!

This is such an important experiment! I wish people out there could see that have not done the experiment! I have done this experiment several times and learnt a bit more each time!

I think I might re-do this experiment for the Forum also!

Some data on my Coils:

Input:
Period: 3.320
Offset: 0.160
Degrees: 17.3
Active: 2.203788426168
Apparent: 2.30821
Reactive: 0.686403717929
Power Factor: 0.9547608

L1:
Period: 3.320
Offset: 0.28
Degrees: 30.4
Active: 8.0004243646859
Apparent: 9.275707
Reactive: 4.6938212608966
Power Factor: 0.8625137

L2:
Period: 3.320
Offset: 1.72
Degrees: 186.5
Active: -6.1948770793364
Apparent: 6.234956
Reactive: -0.7058169710592
Power Factor: -0.9935719

My Turns:

L1 Turns: 175
L2 Turns: 88

Chris

Forelle posted this 12 May 2019

Hi all

Now i have made the Mr. Preva experiment so good i can to prove the point,not so as the original where you see the wire glowing on different sides ,but you see that in one branch is more current flowing than in the other and the 180° phaseshift.One coil has 40t and one 60T ,no capacitor.

In the first picture you see the setup with both lamps glowing at 37Hz.

In the second you see the waveform of the current.Both the same 10mv/div,one div.1Amp

In the third the shifted phase at 887Hz.

And in the fourth only one lamp glowing.

Have a good day.

Forelle posted this 12 May 2019

Hi Chris,

thank you,next step is to delay one of the POC with a Mosfet and Zener or similar with 3 coil setup.Every day its getting a little forward due to this forum and the good spirit of everyone here.

Oliver

cd_sharp posted this 25 March 2017

Here is my replication of Mr Preva experiment using a nanoperm core and some UTP cable.

mich posted this 13 March 2019

Hi to all, I was particularly interested in doing the voltage-current phase shift test to better understand
the behavior of the akula core. Since the circuit is inductive, thus the current is delayed respect the voltage.

misuration 20turns coil

The smaller coil 20 turns test. Trace 1 voltage, trace2 current: delay voltage-current about 25°. Freq: 1KHz

misuration  40turns coil

The greater coil 40 turns test. Trace1 voltage, trace2 current, delay voltage-current about 180° Freq:1KHz

misuration only currents shift

Here we see the phase shift of the two currents together, the mrPreva diagram with currents in opposite directions is confirmed like above. The smaller coil (trace2) is slightly out of phase and higher current, the greater coil (trace1) is in opposite phase and low current. I did not understand why the phase shift is greater than 180° probably due to inaccuracy caused by harmonic distortion I think.

the next step is to figure out how to apply this to akula, I accept suggestions  hi!

Zanzal posted this 13 March 2019

the next step is to figure out how to apply this to akula, I accept suggestions by!

Hey Mich,

Good work on your replication. It has been on my todo list for a long time now to try this replication using AC rather than pulsed DC as I did in the past, but the amplifier I ordered was lost in the mail, and I never reordered.

You mentioned suggestions which caused me to wonder how Mr Preva would behave if four coils where used instead of two. With two coils for a primary the same as the MrPreva and two for the secondary also an identical MrPreva. Of course this is more difficult to test without an isolated oscilloscope and the results probably not very unexpected.. But you asked for suggestions, so I figured I'd toss it out there for you or anyone else. If I get a chance to test it myself I'll share the results.

Chris posted this 13 March 2019

Hey Mich,

Excellent work! Thank you for sharing your excellent progress!

In my opinion, a critical, most valuable experiment to do, to understand and set a baseline for experiments in the future! Now that you have taken this time, to take the step forward, following experiments will be very much easier and make more sense! You know what to aim for!

I would like to invite you to study and participate in the two threads: Parallel Wire or Bifilar Coil Experiment and Delayed Conduction in Bucking Coils.

Your contributions would be most welcome!

Chris

Atti posted this 15 March 2019

Hey mich.

It is also worth noting that if one of the coils is tied up in the opposite way, how the current strengths on the secondary side.
Measurement.
North-South or North-North roll coils.
When bigger and less power. Why?
Thus it is possible to refer to the presumed presence of magnetic resonance.
Good work.

Atti posted this 24 March 2019

Hey Mich.

- Do not delete any posts.
- Everyone's comments are important, you can learn from everything.
- My intention to comment was not offensive.
-If you can do all the experiments, walk around properly.
Draw conclusions.
Only in this way can you progress your work properly.
Precise measurement does not always have to be done, often enough to find out what happens in the circuit. The Mr Preva layout is important, but you don't have to wait for a miracle. But the layout must be kept in mind. I'll tell you another example, but it doesn't necessarily belong here.

I investigated Árpád Bóday's magnetodynamic invention.
Take two parts.
-The primary drive with bridge H, with a 25% -25% filling factor per transformer. The remaining 25% should be the fill factor for the permanent magnet line.
-The secondary side switching can be divided into two parts.
There is a MrPreva "theory" within a transformer.
24V and 12V. forms of binding. The effect is important. Magnetic resonance is important. The load on the backfill is important.

Yet the road to pleasure is stubborn.

And finally, don't listen to me because I'm just a student.

mich posted this 25 March 2019

Hi, you last post Atti seems a lot to Joe Flynn invention, only the magnet are  in internal position instead of external, I try this kind of enbodiment several years ago, finding only the Force moltiplicatioin in the core as Joe said. Certainly you are ahead with the work. thanks

Chris posted this 15 September 2019

I get some members don't get enough time to read and absorb some threads here.

I have been through times of frustration also, same as I see in some posts.

Let me say this: To follow in the path of the greats before us, we must put their shoes on.

What are the similarities of these same works?

We need to be detectives, use analytics to measure our experimental success and failures. This gives us direction!

I think we could remove a portion of the last posts, it is quite off topic?

Chris

Himaliayan Phonix posted this 10 November 2019

Hello everyone I also tried to do the Mr.preva replication and it seems to me that I have got the effect where one bulb on one coil is brighter and the other bulb on the second coil is weak in iluminus, I don't have scope to see the waveforms. The effect is critical to frequency and duty cycle, I am still trying to understand what's going on the circuit. The bulb is brighter on the coil which has less turns. I tried sine wave and triangular wave but didn't found the effect, the effect I only found on squarewave, Am i going to the right direction or am i barking to the wrong tree ? Core = TV Yoke ferrite CW coil = 16 turns CCW coil = 26 turns Frequency = 12.51 Khz Square wave Switching voltage 12v Amps consumed 0.88 Wire used = 2.5 mm

Attached Files

cd_sharp posted this 27 July 2017

I came back to this experiment because I think I need to learn more about it. Here is my basic setup:

with the yellow trace from the MOSFET gate and the blue one from the drain.

Then I unplugged the capacitor and both lights get dimmed a little, but the effect is still there:

So, the capacitor is not needed for this experiment.

I was unable to obtain current traces on the two lamps. When I tried to connect the scope probes over the two sensing resistors, input current went up and both lamps become equally bright.

I'm thinking that the cause is that the capacitors in the scope probes are generating parasitic oscillation.

Any ideas on how I would be able to obtain the current traces?

Chris posted this 28 July 2017

Cd, Zanzal,

At any one point in time, the Coils in the MrPreva Experiment, Buck Each Other!

They Oppose!

This results in a Gain, in the local Circuit, of almost twice the Current. Try to picture the Magnetic Fields, what they are doing, the Currents, and why they Oppose... Right Hand Grip Rule...

Then look at the other devices, like Don Smith:

For some reason, we, the human mind, has a tendance to way over complicate the simple, We need to force our minds to think simply!

Chris

Wistiti posted this 22 January 2018

Hi Vasile, thank you for your reply. If you look one post before the video I post, Chris post an image of the simple circuit I use. The capacitor is not needed.

For your information, I have not say it is over unity... Too much a big word!

I have an oscilloscope, but not to familiar with it... need more time to learn with it... I also have a killawatt. The idea to share this experiment is to give to other the desire to do the experiment... it is really cheap and I think we can learn with it.

Hope I give you the desire to try it or any other Preva kind of experiment!

All the best!

Chris posted this 19 April 2018

Hey Zanzal,

Would an induction heater be more efficient if two coils are used in a style similar to Mr Preva?

As we know the Mr Preva Experiment, is Symmetrical, it has equal and opposite Energy Transformations less losses. This is the reason it is, as it stands, Below Unity! Experiment shows: Current is Amplified, but we see a large Voltage Drop!

Electrical Energy is V x I, by loosing one and gaining another, does not constitute an Energy Gain! However, amplifying Voltage does not cost us anything! This is not a Transformation of Energy! No work is done to Step Up Voltage!

The next Step to The Mr Preva Experiment, is my Thread: Some Coils Buck and some Coils DONT

I introduce the Asymmetrical Energy Transformations, where the Input Energy is not affected, in anyway, by the Output Energy. This is the reason I have posted the Thread: Asymmetrical Regauging.

I see many are not seeing what I have been trying to show, many are not following the trail, not understanding posts I have taken time to detail effects and show where the open doors are. Its ok, I am ok if others do not want to learn.

However, if people want to learn how Energy Machines work, they will need to learn, need to start thinking in terms of Energy Transformations, learn how our Environment can introduce excess Energy!

Your Input of X Energy, is never, ever going to Transform itself into 2X Energy by itself!

You must Open a Door for the Environment to Add Energy!

Chris

Chris posted this 21 December 2018

Atti - Excellent Experiment!

You show exactly The Mr Preva Current Gain! This is a critical aspect of Above Unity Machines to understand.

We loose Voltage, Voltage is consumed by our Load but more critically Opposing Fields, known as a Voltage Drop. An Auto Transformer in Buck Mode is well known for this effect:

### Auto Transformer in Buck Mode

In the above Auto Transformer Configuration, the Secondary Coil "Generates" an E.M.F of 100 Volts, then the output will be 240 - 100 = 140 Volts. We have lost 100 Volts, because we have Bucking Mode in this Auto Transformer.

### Auto Transformer in Boost Mode

In the above Auto Transformer Configuration, the Secondary Coil "Generates" an E.M.F of 100 Volts, then the output will be 240 + 100 = 340 Volts. We have gained 100 Volts, because we have Boost Mode in this Auto Transformer.

So, we have learned that in any Bucking arrangement, there is an elimination of Voltage in Bucking mode. The Kapanadze Coil also is exactly the same configuration, it is only a partial Bucking arrangement. We have conformation of this from Ruslan:

The output voltage will be 195-200 volts. This voltage will not be higher. Why? Later we will return to this. It is necessary to rewind the transformer-reactor (Coil) so as to obtain the desired voltage. This requires experiments.

Ref: Ruslan K

Ruslan is a man of wisdom and avail.

The Coils Coupling is well less than half Unity Coupling, the turns are 48 CW to 36, a difference of 12 turns. At least half of the coil was uncoupled, or loosely coupled. This is the reason Ruslan said: "It is necessary to rewind the transformer-reactor (Coil) so as to obtain the desired voltage. This requires experiments."

Magnetic Resonance gives us a gain in Current. To achieve this, we gain a loss in Voltage as shown. So we utilise Timing and a Stepping Up of Voltage with turns. But this requires Experiment, something I have also said: "Some fiddling is required".

So, your experiment proves a very valuable concept, that of Current amplification. To get to the next step, a little more fiddling is required. You already have one of the most important concepts!

Chris

mrblobby posted this 05 March 2019

Close but never touching.
maximum rotation strength.
Mr Prevas latest video,  plus a couple of images to illustrate what I think is going on.

The optimal distance to remove maximum energy

The part of a vortex that has maximum torque or turning strength.

Chris posted this 07 March 2019

Hey Mich,

I have a simple calculator here: AC or Sinusoidal Power Calculator

Hope this helps! Ask if you need help! Great job!

Chris

mich posted this 11 March 2019

Hi, I have rebuild the experiment and have found the negative PF in one of the coils, but I have yet to fill other tests.

these are the results:

sort of akula core trace1 (with current amplification)

1.03V effective

0.63A effective

Phase: 168º

Watt: -0.63

PF: -0.978

trace2(with lower current)

1.03V effective

0.25A effective

phase: 15º (approximate)

Watt: 0.25

PF: 0.965

thanks for support!

Zanzal posted this 14 March 2019

to Zanzal: Hi, thanks, which experiment are you referring to?

Perhaps a visual illustration would make more sense. This is what I was trying to describe:

Ignore the component values as they are only placeholders.

mich posted this 15 March 2019

Zanzal: the lamp test is my next step, still in work.

Atti: what you are referring to is the experiment (I suppose) similar to the Chris experiment "Some Coils Buck n some Coils DONT" , that I started a while ago, right?    also still in work.

thanks to all

Atti posted this 16 March 2019

mich.

Reference?

You need to start thinking sooner or later, what is good to keep but to misinform the wrong information.
They are trying to imitate the work of many inventors. Right or wrong.
Chris points out that good information (such as magnetic resonance) should be kept.
Mrpreva case. There is hardly any induction at one of the magnetic arrangements, so there is hardly any secondary current.
In the other case, one of the coils has more current (which will do something again)
For example, the layout is similar. Just like that.

Primary current is less than secondary current. Now tie it to the Preva layout. If you would do this with a disc meter
(which is irregular and punishable !!)

then the dial gauge rotates faster in one of the binding directions.
At the other binding direction, the disc measuring clock stops.
Why is that? What does the current do with the dial?
But this was just one example.

http://aramlopas.blogspot.com/p/blog-page.html

Personally, I think it's good to think about everything, and of course I try some things. Watching for bad experiments. Because there is plenty of it.

And finally:
One measurement is not a measurement, two measurements are a half measurement; you can start with three measurements ...

mich posted this 20 March 2019

hi to all, with this I hope to answer Atti's suggestion,

the experiment looks very much like another experiment of an brasilian boy, concerns a kind of resonant transformer.

1

1

Frequency 1KHz. The power supply is via a sinusoidal generator and audio amplifier, the lamps are all perfectly equal (2.7 ohm), the current is detected with toroidal cores, it is not an accurate measure but I am only interested in having an idea of what happens. In this case the current follows the law of the resistive divider so only the lamp with the highest voltage drop is switched on. The traces are currents, 50graus phase shift.

------------------------------------------------------------------------------

2

2

Frequency 7KHz. In this case the situation changes and we have a current circulation between the 2 coils L20turns(blue coil) and L40turns(black coil). In fact, if the lamp is removed from L40turns(black coil) the phenomenon does NOT occur and the other lamps light up together with ANY frequency with identical and halved brightness. It's remarkable that the power is greater on lamp L20turns because as we have seen previously the phenomenon of current amplification is verified. 131graus phase shift.

---------------------------------------------------------------------

Now the current sensing is moved to the common line.

1A

1A

Frequency 1KHz. L20turns current test in comparison with the total current, we see that the power absorbed on the lamps follows again the law of the resistive divider. There is no phase shift, note the amplitude of traces.

-----------------------------------------------------------------------------

2A

2A

15KHz frequency. Trace 1 current on common line, trace 2 current on L20turns (blue coil). The frequency is higher to demonstrate the phenomenon more clearly, it is important to note how much the current that circulates between the 2 coils increases, and how low is the overall current absorbed, (to be confirmed). here too we have no phase shift.

EDITED: I think this exp is important although I have not completely understood the phenomenon. The overall power seems to be less, but in reality there is absorption. Soon I will correct the parts where I made some inaccuracies.

thanks good day

Chris posted this 24 March 2019

My Friends,

I do apologize, we may sometimes have Translation problems with some posts. I am sorry if this happens, I have not finished the Universal Translator yet.

Atti is right, please do not delete any posts.

If there is any posts that may come across as offensive, please private message me and I will sort it out!

Guys, these experiments are excellent! Please keep the good work up!

Chris

Chris posted this 14 June 2019

Spot On Vidura!

You're exactly right!

Chris

getreal156 posted this 15 June 2019

Hi Vidura,

Very interesting indeed. During my experiments I also tried several 1:1 ratio coils. None of them showed any good results (so far).

This seem to confirm your statement about the need for more windings in one coil to create a higher voltage. Why and how this works I don't understand (yet). I will however keep experimenting with the 1:1 coils. My gut feeling is that there is much more going on and we have to get to the bottom of it.

I'm not convinced that the bigger coil should be wound from thinner wire. The best results that I have seen so far come from a type of coil where L2 is wound over L1 on a single bobbin and put on an E core. Similar to what Akula showed. Both L1 and L2 have the same wire size (2,5mm2 stranded PTFE insulated wire) and a 7:23 winding ratio. I could be totally wrong but my personal experience in my devices is that bigger coils with many windings give less output. I speculate that this might be due to heat generation in the coil (increase of resistance).

BR

Jasper

patrick1 posted this 24 August 2019

Hello Chris I understand your position,.  however i do stand by my test results at this stage.  please allow me too prove myself wrong, rather than trust the prevailing winds.

i sincerely hope too be able too prove myself wrong, thus learn something more important than free energy !!. taking competent measurements and living up too my training and military certs.

MAKE no mistake though, - this place has wonders beyond the realms of mortal men. ... that i am only beginning too understand.. let us grow together, - and know that i definitely accept the possibility that i am wrong. but it would be a world first.

solarlab posted this 10 September 2019

Hi Parkham,

There is a variety of information and videos regarding the "MrPreva" circuit in this thread - scroll up to the beginning for a good review of the subject.

Of interest is the observation where it appears there is a circuit current in the forward direction of 2.8A, a second current in the forward direction of 5.1A  through the top torroid winding; but most interesting is an apparent reverse current of 2.3A through the lower torroid winding - in the reverse direction. This is shown in the second diagram in the attached pdf file above.

A typical circuit of similar type is a simple offset BALUN, thus the reverse current observation is (likely) a new "thing." It will be interesting to discover the fundamental details!

Although Chris and other members know this circuit probably better than most; I do not believe the circiut is developed enough at this point to be of any real practical application. But if the reverse current anomolies have merrit, then there might well be some interesting and useful off-shoots - as seen in the simplified current diagrams!

Note that this is but one of the many potential "excess energy" concepts being explored here at AU; however there are a few real proofs that have now been demonstrated. My primary quest, and that of many other investigators here, is to develop a generalized theoretical basis, including the mathematics and experimental evidence, for these "excess energy" devices. Without a viable theory we are still in the dark for the most part.

A "valid" parts list will ultimately result through the detailed schematic needed for simulation analysis; so hold off a bit until the schematic is CAE validated or, at least, shows some promise.

Have good one, SL

Jagau posted this 15 September 2019

I prefer to quote Tesla on the last words;

Today's scientists have substituted mathematics for experiments, and they wander off through equation after equation, and eventually build a structure which has no relation to reality. . . .

The scientists from Franklin to Morse were clear thinkers and did not produce erroneous theories.  The scientists of today think deeply instead of clearly.  One must be sane to think clearly, but one can think deeply and be quite insane. . .

The scientific man does not aim at an immediate result.  He does not expect that his advanced ideas will be readily taken up.  His work is like that of the planter—for the future.  His duty is to lay the foundation for those who are to come, and point the way.  He lives and labors and hopes.

It summarizes my thoughts

Jagau

cd_sharp posted this 06 March 2020

Hey, Andrew You need an adjustable frequency oscillator and preferably ac sine wave, but the effect is present with DC pulses also. You need to look for the resonant frequency. A multimeter will measure AC current only for the mains frequency.

Chris posted this 06 March 2020

Hey Andrew,

CD is right. More turns can also help, but you should still get a result with that once you find the right Frequency. This is great to see! People taking on a challenge! Others, here, helping and mentoring! I am very pleased to see! Thank You guys for sharing and helping!

There is lots to learn here Andrew, keep up the good work! If you can post a video , we can help further.

Best wishes,

Chris

parkham posted this 08 June 2017

Hi.  I have a few questions:

Input voltage / amps, how much?

Coil wire gauge?

What capacitor to use?

Also, what are each of the white blocks in your replication?  Can I see the entire picture?  Like what the wires are running to as well?  It's easier for me to see it, in addition to reading the schematic.

Thank you,

cd_sharp posted this 31 July 2017

I moved my probes to match this scheme:

and I fed a sine wave at 10kHz to the MOSFET's gate. This is the result:

where the yellow trace is the current on the 11 turns branch (weaker) and the blue is the current on the 7 turns branch (the one with the brighter lamp, the stronger). It looks like there are moments when the weaker branch has 0 current, but the stronger one is almost continuously having current.

cd_sharp posted this 01 August 2017

Sure, Chris I see what you mean.

Generally, the two magnetic fields are fighting each other. There are some short moments on the yellow trace where the current goes slightly negative, so the current on the weak branch partially adds to the current of the strong branch. The other way around never happens.

So, if we could make the current on the weak branch negative for more time we would have a brighter lamp on the strong branch.

cd_sharp posted this 04 August 2017

I watched closely Itsu's first video and the coils seems to be adding the magnetic fields. Based on this I rebuilt one of my coils and the result is similar. I disconnected the bulbs because they modify the sine wave traces.

I confirm the phase drift and the current difference between the two banches:

alohalaoha posted this 17 August 2017

high jump MR.PREVA

anothercat posted this 05 November 2017

Hey guys,

I would like to point out that in the following video it's exactly the same phenomenon with slight differences:

I guess that the 2 secondaries are in bucking mode...

blackboarddd posted this 06 November 2017

Hello everybody, maybe mine is a silly question but are the two coils wound in opposite directions?

Thank you

blackboarddd posted this 06 November 2017

Can't wait to start testing, anyway my guess is the windings should be opposite...

blackboarddd posted this 07 November 2017

Thank you Zanzal for the hint. Which core material do you suggest to use for the inductor?

Regards

Zanzal posted this 07 November 2017

Thank you Zanzal for the hint. Which core material do you suggest to use for the inductor?

I think some of the videos the core was said to be nanoperm. I've not personally tried successive testing with the same setup varying only the core material so I've got no insight into it.

Chris has recommended others to use whatever they have handy - this is the best advice I could offer you. I've asked Chris several different times and different ways and what I've learned from him is that there are no magic core materials but there are sometimes bad core materials that can cause an experiment to fail. If you have trouble with one core material, you might document it and try another.

Wistiti posted this 22 November 2017

Hi team!

I have find a simple to build device that use the same concetp...

http://overunity.com/12487/simple-to-build-isolation-transformer-that-consumes-less-power-than-it-gives-out/#.WhV-mWeotaQ

Does someone here have already replicate it? I think i will give it a try when the time permit...

Chris posted this 22 November 2017

Hey Wistiti - I have build variants as you know. Youre right, this device is very similar to the Mr Preva Experiment:

Voltage is a quantity, as is Current, Electromagnetic Induction is a process that Transforms Voltage and Current. However, as we both know, this is not terminology that accurately describes the process!

Electromagnetic Induction produces a quantity of Voltage, which is E.M.F, Electromotive Force, it "Generates" or Pumps Voltage and therefore Current in the Second Coil. But this is not even entirely correct! Because this is a One to One process, less losses, we will always see a drop in total power. The Losses need to be over come by the Excess "Generation" or Pumping of Voltage and Current.

Current is Magnetomotive Force, M.M.F, and this Force needs to be off balanced by an Opposite force, to counter the One to One ratio less losses. In other words a Asymmetrical System instead of a Symmetrical System!

This is an old video, it was a year or so old when I posted it to YouTube. Its some of my early work:

Moving from a Square wave to a Sinusoidal wave is a start to seeing Energy Generation.

This is all stuff you already know, but for the other readers, they may find it useful.

Chris

Wistiti posted this 21 January 2018

My trying of the Mr Preva the way Jacknoskills do.

Wistiti posted this 22 January 2018

If someone are interested to replicate here is photo of the transformer i use.

Attached Files

Chris posted this 23 January 2018

Hello Wistiti,

Please consider that little curent in vs. more current out, does not necesarily mean what most people call ''Overunity''.There is also Voltage and the phase difference between Current and Voltage. Do you have an osciloscope? If not, the least you could get is a wattmeter. Now...by putting the wattmeter between the wall and your input you can get an idea of at least the power being put in. If u take the only consumer to be your bulb, than you could judge the power it has flowing thru it by its light intensity(at least for 50Hz is ok), but I would recomand an osciloscope.

Vasile

Hey Vasile, rightly pointed out, and if I may say, Wistiti is very aware already of this.

Learning to Amplify Current is perhaps the largest step forward. Wistiti has kindly shown this step forward along with others like CD_Sharp and others.

A Question, in your words, how would you describe this process?

Chris

Zanzal posted this 20 March 2018

Chris mentioned to me that very few people have taken the time to reproduce the Mr Preva experiment. Thought I'd share mine. Redid it real quick. This is not the AC variant so my waveform is not very interesting. Finding the resonance point for parallel resonance was as simple as dialing in the frequency into the lowest current draw. Here is what that looked like:

Attached Files

Prometheus posted this 15 September 2018

AC appears to work better than DC.

Square-wave AC works best in my testing. The effect is highly dependent upon the ratio of turns in the transformer vs. the frequency vs. the capacitance. It seems sometimes the magnetic induction overrides the ability of the voltage to push through both coils in the same direction, and sometimes it doesn't, dependent upon the parameters mentioned above.

If you get your capacitance and inductance just right (ie: hit a resonance point), you can get more current flowing through the second winding than flowed through the first (the second light is brighter). I'm unsure why it acts this way. Parametric resonance?

Atti posted this 20 December 2018

I know it's broken bone. But it's a simple informational measurement by reversing the magnetic directions.

alohalaoha posted this 17 February 2019

The other side of mirror....

mich posted this 14 March 2019

to Zanzal: Hi, thanks, which experiment are you referring to?

Chris posted this 12 May 2019

Hey Forelle,

An excellent example of how the Currents are 180 degrees out of phase! Well done!

Chris

Forelle posted this 14 July 2019

Hi everyone,

i am still experimenting with the Mr.Preva setup and measured in and out,which did  surprise me.

In from Audioamp 12,67V and 2,1A=26,6W

Out first coil 12,25V and 1,25A        =15,31W

second coil 11,62V and 1A              =11,62W

=26,93W

I never had something i measured more out  than in it is a very small difference and the measuring devices are not very accurate but if it would have 95% it would be a very good transformer for the size.The 180°phaseshift was at 744HZ,one coil had 40 turns and the other 60.It is the same device i have shown some posts before.

Have a good day.

Oliver

Forelle posted this 18 July 2019

Hi everyone,

I think there is no need for a new thread,all i think is that this experiment is not finished because there is a lot more to investigate,the sad thing is that it is much easier for me to built a motor or generator than to actually tune or adjust a device like a transformer.I have no problem with proceeding publicly but i allways think what i am doing  is not intresting enough for others or worth to show.Maybe when i have finished the Mr. Preva Experiment i make my first video.

Have a god day.

Oliver

patrick1 posted this 19 July 2019

Forelle, well done !! i think its amazing.  - also my Preva was successful too !!. i think i got about 130% efficency, , nearly as good as your 140%...  so very consistant,  but if you can spot and other improvements that would be amazing too !!.... afterall, the russians have glowing nichrome wire, -  we can have globes. - ....   anyways its only a competition if your coming second !! rawr

Atti posted this 21 July 2019

patrick1

i think i got about 130% efficency,

Forelle posted this 01 August 2019

Hi Patrick,

how do you came up with 140%?

26,93 divided by 26,6%=1,012

and due to measurement errors i am sure it is under 100%

Have a good day

Chris posted this 24 August 2019

Hey Patrick,

I do not mean to be a party pooper!

I hope your results prove me and my results wrong! Good luck!

Chris

parkham posted this 10 September 2019

I came here two years ago, and for whatever reason forgot about Mr. Preva. And for whatever reason, like an itch in the back of my mind, I couldn't scratch it.  So, here I return.  I'm pleased the site is up and active.

I want to do a replication.  Consider the following:

I have basic electronic skills.  I like visuals as well.  I don't have stuff lying around, as it were.  Would someone please supply me a parts list and point me to a replication video?  I also want to know if I can use this device to keep batteries charged.  I would be honored to make a donation to the Patreon fund after I confirm the technology is real, and useful.

Thank you,

solarlab posted this 15 September 2019

Why focus on the "MrPreva Experiment" as an example beginning CAE Analysis target?

Well, several reasons:

First - the circuit is about as simple as it gets.

Second - after dozens of pages of information, speculation and experiments there does not appear to be any "real technical stuff" presented with respect to the actual circuit, it's potential, nor it's actual operation and why it does what it does (if it actually does anything extra ordinary).

Third - the circuit quickly evolved into a variety of off-shoot circuits and configurations with accompanying claims of various sorts. But, still no concrete postulations or viable explanations of the circuit's operation with support data.

Fourth - the "MrPreva Experiment" will hopefully present a starting point for the introduction of CAE Analysis into the general subject which will further provide another method, or tool set, for discovery. While pointing out ways of clearly understanding and evaluating.

Spice analysis is a mature accepted technique used by millions of designers and, as such, there are litterly thousands of proven resources to draw from. Many of the Spice simulation packages are free and include professional grade features so it's a very good "next step!"

Fifth - Spice CAE provides an excellent pre-cursor to advanced Electromagnetic FEA analysis which will ultimately be required to fully discover and implement the advanced "excess energy" devices of the very near future.

Notice that no canned circuits or cooked examples are provided here - that would quite simply defeat the purpose IMHO!

SL

solarlab posted this 16 September 2019

Hi Chris,

Before deleting these "off topics" - please, try this first:

- brifely scan the Help file, then read the FAQ (bottom of Help) > Simulating Transformers;
- get the "bulb.asc" file (previous link) - use it in a Hieararchy schematic (probably easiest initially);
- create the "MrPreva" schema and simulate (transient, AC and DC), sweep over freq range, vary pulse width.
- if you want, - screen capture and post the results (schematic plus various current and voltage probe waveforms).

After that brief exercise, delete all these "off topic" posts!  Then I can just quietly move along into the night... without commenting about reading and absorbing...

Regards,
SL

YoElMiCrO posted this 19 September 2019

Hello everyone.

Due to lack of time I could not continue with the experiments.
For now I will read the new posts to catch up.
If I have dedicated time to understand what happens in
the fordward topology which is the same more or less than
Preva's experiment but only in the first quadrant.
Using KLC together with EM is that the behavior is understood.
In the first time I have I will publish what happens to me in
both circuits.

YoElMiCrO.

Chris posted this 10 November 2019

Good to hear Himaliayan Phonix! Sine is normally the best wave shape but most will give varring effects.

Keep up the great work!

Chris

Himaliayan Phonix posted this 10 November 2019

Thank you Chris , can you look at the attached picture and tell if I have done it right ?

Chris posted this 10 November 2019

Hey Himaliayan Phonix, HP for short ok?

If you measure the Currents, you should get close to 2x the input current. This will tell you if its right, I am sure it is, as the globes are showing this.

Chris

Himaliayan Phonix posted this 10 November 2019

Thank you Chris yes I need to measure the current , I will measure and do more analysis, by the way you mean to measure current on the coil with less turns right ? ( in my case It's the one on which the lamp is more brighter)

Zanzal posted this 09 June 2017

Hey Chris,

I've not tried the MrPreva experiment as I was fairly certain by looking at it that it would not function if pulsed dc was used to drive it directly (without an inverter) and I don't mess with anything AC. Can you (or anyone else) confirm this assumption?

• Liked by
Chris posted this 25 July 2017

To properly reference this thread, I would like to Cite the Reference:

Please see: The Rotary Transformer - Tinman for information on how this very simple Circuit can be used in Above Unity Applications!

We now have busted the door wide open!

Chris

• Liked by
Zanzal posted this 27 July 2017

I've had similar issues with my probes interfering with the circuit, so I just started using 10x and it seems to have helped with that. If your probes have a switch for a 10x setting then you might try that, just make sure your scope knows the connected probe is set to 10x (don't forget to check probe calibration after switching).

• Liked by
Zanzal posted this 28 July 2017

AC appears to work better than DC. Chris mentioned time rate of change, but I think that's only part of the reason. With AC the circuit is never really "open" (maybe twice per cycle at the beginning and mid points when voltage is zero), but DC pulsed by design opens and closes the circuit and I think this reduces the effect also.

If I am remembering correctly from some weeks ago when I watched the videos, initially both lamps seem to light up about the same, but over time a reverse current builds up along one path causing that path to become a source in parallel with the main source. Not only is the current reversed, but it is self sourced meaning that it becomes its own source.

The experiment does provoke a lot of thoughts on the nature of energy. We all know Ohm's law, V = IR, but has anyone considered that V = J/C (Joules per Coulombs) which is J/C=IR, and that C=I (or Amps per second) which means this can be re-written as J=I^2R. Is V nothing but a manifestation of I^2R? (As a side note, this equation is also the same as the heat in Watts dissipated by a circuit so if you don't know it, you should memorize it for the future, you'll need it to estimate heat dissipation).

Has anyone ever considered why getting voltage is so easy, but most large voltage values are unable to move significant current. We know from the above that something must be missing. Ohm's law must be incomplete. If we can eliminate V and still be left with a missing set of behavior that can only be understood by measuring V. So what is that? V is only the current electrical pressure within the circuit in an open circuit, pressure can build so you can get high voltages even from very little pressure. You can increase the voltage using a transformer, but that voltage can't gain you any current without drawing it from the source.

So what does this have to do with Preva? Maybe nothing, but maybe the experiment proves you can break the rules temporarily even if in the end you never see that it happened unless maybe you question whether Ohm's law was broken.

Of course don't take my word for it. I've only ran the experiment once a few weeks back and on DC. At the time I ran I hadn't even considered these things and had no idea why it was important. This is just me sharing some random thoughts.

• Liked by
Chris posted this 29 July 2017

We need to force our minds to think simply!

Nice one.

Hi Vasile - Of course I mean this in the nicest possible way!

Chris

• Liked by
Chris posted this 04 August 2017

Hey CD, the Bulbs likely are pulling more current than the core can handle, the core will be saturating and as a result the globes change the Sine Wave.

The core might be a low saturation core. Its normal. The Sine wave looks like its got sharp peaks at the top and bottom and not much in between?

Really nice job CD!

• Liked by
cd_sharp posted this 04 August 2017

The Sine wave looks like its got sharp peaks at the top and bottom and not much in between?

Yes. The core material is 3E25 ferrite toroid and you are probably right about the saturation. I'll try with some smaller bulbs.

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Chris posted this 12 August 2017

Another successful replication of the MR Preva Experiment from someone we are all familiar with: TheOldScientist

If you think careful about the Currents an how this device needs to be in RLC Resonance you will see something really amazing!

When the Coils are in RLC Resonance the current in each coil has a propagation relationship. This as pointed out in the title. Wave Propagation theory is well worth studding. This will make more sense after the video:

.

When the Wave propagates, there must be 1/2 Wave Length as mentioned in the video, for efficient Wave propagation.

Chris

• Liked by
cd_sharp posted this 13 August 2017

When the Coils are in RLC Resonance the current in each coil has a propagation relationship.

The formula is:

f = 1 / 2 x ᴨ x sqrt( L x C ).

But in this case we have two coils, so we have L1 and L2. Which value should we use?

When the Wave propagates, there must be 1/2 Wave Length as mentioned in the video

Is it about the length of the wire? Or is it about the number of turns? When scaled up to hundreds of turns we end up with several layers and the number of turns ratio does not keep up with the length of the wire.

• Liked by
alohalaoha posted this 13 August 2017

Successful replication by Kirill Anashenkov  - 30W ferroresonance flash-light with same type of MR.PREVA coils inside ferro-resonant pot. Device has worked whole night and finaly burnt from primary coil to components. Seems energy time dependent like Sweet vta and Stiven Mark - tpu. Correct schematic is in Kirill's video.

Сердечники из магнитных материалов

https://lib.chipdip.ru/245/DOC000245900.pdf

Основные характеристики магнитомягких ферритов

https://lib.chipdip.ru/245/DOC000245902.pdf

p/s. Автор Кирилл АНАШЕНКОВ:
"Это называется ферро-резонансом сердечника. Действует контур L1-L2. Конденсаторы желательно подобрать ближе по значению (электролиты). Вначале горел не долго-пару минут. Затем поднимал кондер 100 пФ, и менял обмотки-тем самым добиваясь наилучшего (максимального) - но неискаженного отношения частоты-амплитуды на нижнем электролите. После запуска левая половина схемы с ТЛ494 - не работает уже. Дроссель служит от изоляции синдрома 50 герц. Далее светил час, а потом добился большего - оставил на ночь... и трансформатор сгорел (первичка). Далее,в томительном ожидании деталей с Китая,забросил это дело на время. По всн у мея сдвиг на Теслу."

• Liked by
Chris posted this 06 November 2017

Hello and welcome Blackboarddd!

By experimenting with the Coil winding direction, you will find there is one way that works best in this configuration. I suggest increasing the turns to a greater number, making a little more work, but it is easier to get a result and learn from this very valuable experiment.

The Magnetic Field (B), changing in time (dt) in the proximity to the Turns (N) is the catalyst for Electromagnetic Induction. With Few Turns one will need a great Magnetic Field at High Frequency.

Chris

• Liked by
Wistiti posted this 06 November 2017

Hi Blackboarddd! Don’t worry to ask; there is no silly question!

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Zanzal posted this 06 November 2017

Can't wait to start testing, anyway my guess is the windings should be opposite...

Yes, the windings in the Mr. Preva setup oppose. IMO, this experiment works much better with AC than it does with DC.. Pulsed DC results are a little fickle and while you'll still see one lamp brighter than the other, it may be harder to measure what's going on or determine if you are in resonance. With AC it will be much more obvious and you'll see the two coils are completely out of phase (when in resonance).

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Antimony posted this 06 March 2018

I tried to make a sort of replication really fast today of this experiment, but i am not as knowledgeable as some of you others here, so i don´t know what to make of it.What should i look for?

I will go through the thread again when i get some time off to really get an understanding of the concept.

I haven´t did any coil measurements, or RLC matching, or anything like that. I just took what i had laying around, but i will in the future try to make it more like Chris has outlined in some of the schematics he has posted.

My L1 and L2 are thinner wire, and much more turns, + they are about the same regarding turns, mass and all that, but i saw that Chris had done that in one of the others he posted, so i went ahead.

I did get some cool synthesizer noises coming from it thou every time i sweep frequencies between 10-200 Hz, and the kids loved that.

• Liked by
Chris posted this 06 March 2018

Hi Antimony - Yes, re-reading and watching the videos will help make more sense of this.

Basically, we see the Current Double in the Circuit, thus the term used above increment of current. This is an Auto Transformer of types.

When youre happy this makes sense toyou, and if you need, please ask questions, then my next thread: Some Coils Buck n some Coils DONT will help with further understanding!

Chris

• Liked by
Chris posted this 20 March 2018

Awesome Zanzal - Thank You so much for sharing!

Please everyone, this is a very important experiment! Please take a few minutes to replicate this experiment, then one can take many long hours studying the Results! It is an invaluable Experiment!

Thanks again Zanzal! This is excellent!

Chris

• Liked by
Wistiti posted this 21 March 2018

nice, Professional looking, setup Zanzal.

Thank you for sharing your experiment!

• Liked by
Zanzal posted this 13 April 2018

So this is a bit random, but I thought I'd post a experiment for those who really like the Mr Preva concept and are looking for something interesting to try:

Would an induction heater be more efficient if two coils are used in a style similar to Mr Preva?

• Liked by
p75213 posted this 30 August 2018

Hi Chris,

Could you explain  "I = da+ / dt + da/ dt" . I know I = current. However I don't know what the rest is. Derivative of something with respect to time. da+ and da-.

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cd_sharp posted this 30 August 2018

Hi, P! If I may, da+ / dt is the current flowing from the power supply and da/ dt is the current being "generated" by the bigger coil. If you wish, generally, da / dt  is the charge amount moving during the unit of time, in other words, electric current.

• Liked by
Marathonman posted this 30 August 2018

I agree. in the 1900 they found out current runs from - to + (JJ Thomson) but were to lazy to change it. i do not believe this as the misinformation was there to confuse your average person or researcher, this was done purposely. i have done my own tests that does prove it is so. while i still disagree on the whole electron thing and it's origin i will concur current does run from negative to positive. Negative is the Pressure, Positive is the non pressure thus will always flow to equalize. without positive non pressure current will no flow.

Regards,

Marathonman

• Liked by
Marathonman posted this 15 September 2018

Could there be some forward biasing involved like that of a mag amp,  more so at certain frequencies.?

Regards,

Marathonman

• Liked by
Vidura posted this 16 September 2018

Hi Prometheus,

Good to see new members joining to the forum ,participating and experimenting! I have also done some tests with the mr.preva experiment and similar circuits with diodes and found that the interaction between the coils and the timing can be changed by varying the parameters, although i have not found the explication yet.

• Liked by
Prometheus posted this 17 September 2018

Ahaha! Here's a pretty good explanation:

We provide the "wind", the transformer is the "lake", the standing waves are the two current directions, but we're pushing the 'waves' high enough that they overflow the 'banks' of the 'lake'.

It's a rough analogy, but it helps to understand what's happening. I wonder if you had a center tap on each coil with a diode, connected to ground such that you could pull electrons in from ground? You'd have to drive it pretty hard to get the node of the standing waves below 0 volts such that electrons are pulled in from ground, but it could be done.

If it works, I propose we call it the "Moses" transformer (think of Moses parting the Red Sea).

• Liked by
Jagau posted this 17 September 2018

If you re-read the beginning of this thread, you will understand how the MrPrevna experience works, which is the reality, please Moise that I respect should not be mingled with our discussion.

Jagau

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Vidura posted this 17 September 2018

Prometheus, The principle how the mr. Preva experiment works "normally" is straightforward, the current flowing in the direction of the coil with less impedance, and the opposed magnetic field makes the current in the other coil flowing backwards, I did understand that you could reverse the direction, which would be certainly a very odd behaviour.With the other direction I mean the lamp on the coil with more impedance would light brighter.

• Liked by
Vidura posted this 18 September 2018

It's a rough analogy, but it helps to understand what's happening. I wonder if you had a center tap on each coil with a diode, connected to ground such that you could pull electrons in from ground? You'd have to drive it pretty hard to get the node of the standing waves below 0 volts such that electrons are pulled in from ground, but it could be done.

You can see the circuit which posted Chris in the thread "finding the resonant frequency of a LL resonant circuit", it has no centertap, is similar to the mr. preva circuit,but the current is forced in opposed direction by diodes, and it has no tank capacitor. In this thread you can see a video from the experiment I had posted. Regarding the electron pumping CDsharp has posted a experiment where he could do this in a very similar circuit, first it appeared that the current was flowing against a diode, when he searched he found current flowing to ground(electrons out of ground).I don't remember exactly which thread, it was a couple of months ago.

• Liked by
alohalaoha posted this 06 January 2019

• Liked by
mrblobby posted this 10 February 2019

The latest from Mr Preva, Two resonant circuits on one core:

• Liked by
Chris posted this 06 March 2019

Fantastic job Mich!

Thanks for sharing! Another example showing how simple this can be and how much can be learned!

Did you note the negative power factor in one of the Coils? The Coil where the Current is 180 degrees out of phase?

I posted some numbers above showing this.

Great Job Mitch Thanks for sharing!

Chris

• Liked by
mich posted this 07 March 2019

I do not think I can make those measurements, I'm still learning

Thanks to you

• Liked by
Atti posted this 09 April 2019

Hey Mich!

This is not Joe Flynn's invention! This is not the arrangement of the arrangement or the coils!
This is the invention of Árpád Bóday!

• Liked by
getreal156 posted this 13 June 2019

Hi all,

I saw this one that I think belongs to the Preva list.  Very interesting experiment

Later I will post some info on my own device.

BR

Jasper

• Liked by
AETHERIC_MIND posted this 15 July 2019

Hi

Here is a link to the elaborate explanation to this type of negative resistance by Gabriel Kron.

http://emediapress.com/johnbedini/icehouse.net/john1/

• Liked by
Chris posted this 18 July 2019

Hey Oliver,

If you wish to proceed publicly, that is?

Chris

• Liked by
patrick1 posted this 24 August 2019

Hi Atti, good question my friend, - i actaully seem too recall my best mr preva result was 113% efficiency.  but it is hard too be sure.  - although i am as sure as i could be. - analog meters are very good for this kind of range.

still a facinating results. and i am building on it as we speak, be sure i will share my results ;=)..  also please note, all my previous results were using an audio amplifier, - i was unable too get those results with a square wave. - however i am working on that as we speak,... very important since audio amplifiers are very limited in frequency.

• Liked by
Chris posted this 24 August 2019

My Friends,

Atti has a point, as do others here.

@Patrick - I have done The Mr Preva Experiment about forty times and all my experiments, as it stands, are all Under-Unity.

Supporting Figures are a recent Rule we termed - IMPORTANT NOT TO MIS-LEAD OTHERS.

New Rule: Any COP > 1 Claims must be accompanied by Measurements please!

The Mr Preva Experiment as it stands is Symmetrical - There is no Asymmetry to it! It is impossible to get Above-Unity figures from a Symmetrical Machine! Input = Output - Losses!

The Machine must be Asymmetrical to get Above-Unity Figures. With some modifications to the experiment one can get Above-Unity Figures, so again I ask you, present your figures if you have done the math and we can write it up.

I am sorry but this is important! Getting a reputation for a bunch of BS in our pages is not the goal here!

In the decades been, haven't we seen enough wrong doing by Traitors of Humanity! Most of us here know who I am talking about! Lets be better than that!

Chris

• Liked by
solarlab posted this 09 September 2019

Hi Fellows,

Since it appears the "MrPreva" circuit efficiency (<1, 1, >1) question still remains unresolved, further analysis might be in order.

Having not followed the discussion closely a quick review of this thread leaves me with these conclusions:

Although a relatively simple appearing circuit; this combination of components may have some hidden effects that warrant further analysis and study according to several investigators.

NOTES:
1. it is unclear at this point whether the V1 generator is Sine Wave or Pulsed.
2. However one video shows a pulsed source at f = 23.5 kHz with 37.5% duty cycle.
3. There are a lot of posts that show an effect of one bulb brighter than the other.
4. However, there are also a lot of posts where the "effect" is not seen.
5. Several "claims" of up to 130% and 140% efficiency are also reported.

Therefore; it might be worthwhile to investigate the "MrPreva" circuit further in more detail. This circuit does NOT appear to fall into either of the two n2 basic catagories (non full-cycle or asynchronous) so, does the "MrPreva" circuit present yet another excess energy anomoly - is something "hidden" within it's configuration?

Maybe we can find out!

A rough draft "semi-formal investigation" proposal is attached.

If any of you fellows have simulation, analysis, detailed coil data, MC12 schematic, or other information that would help shed light on this circuit please share it. Also, if you have access to a "Spice model of a light bulb" that would be very helpful.

Thanks,  SL

Attached Files

• Liked by
parkham posted this 10 September 2019

Other questions:  Is this similar in some ways to the Benitez device or Bedini SSG?

• Liked by
Chris posted this 10 September 2019

Hi Parkham,

Similar to Benitez - I would say no from what I know.

Many videos and circuits on this thread, you can replicate as you wish.

You will need:

1. Two Coils, one with less turns than the other.
2. One AC Capacitor.
3. Sine wave Function Generator.
4. Audio Amplifier.
5. Wire to connect.
6. Time to replicate.
7. Help can be found here.

I hope this helps!

Chris

• Liked by
solarlab posted this 15 September 2019

"MrPreva" Circuit

Should anyone be interested in a Spice simulation of the "MrPreva Experiment," here are some links of interest, including a Light Bulb LTSpice model file:

Paper - "A SPICE compatible Behavioral Electrical Model of a Heated Tungsten Filament"
https://wwwee.ee.bgu.ac.il/~pemic/publications/conf004.pdf

Lamp Spice model: [see the "my_model_files" directory...]

Related: "Use Light Bulbs as Current Limiters?" [also see comments]
https://www.eetimes.com/author.asp?section_id=36&doc_id=1331961#

Might provide some further insight into this highly touted, "MrPreva," anomoly of modern science, circuit!

Have fun and happy experimenting!

PS: Example - A partial list of some magnetics Spice models that are available on-line:

Using Coilcraft's Advanced Models in LTSpice
https://www.coilcraft.com/modelsltpice.cfm

Transformer Model in LTSpice – Step by Step Guide
http://electronicsbeliever.com/transformer-model-in-ltspice-step-step-guide/

LTSpice Circuit Simulation Tutorials for Beginners
http://electronicsbeliever.com/ltspice-circuit-simulation-tutorials-for-beginners/

SPICE modeling of Magnetic Core from Datasheet
https://www.youspice.com/spice-modeling-of-magnetic-core-from-datasheet/

WURTH ELEKTRONIK Magnetic components
- Spice libraries (many {huge selection by part #} - LTspice, Pspice, etc...)
https://www.we-online.com/web/en/electronic_components/produkte_pb/bauteilebibliotheken/ltspice/ltspice.php?blank=
- General components
https://www.we-online.com/web/en/index.php/show/media/06_passive_components_-_custom_magnetics/toolbox/Finished_Goods_Catalog_2019_E-FILE.pdf

Amidon toroids
http://www.amidoncorp.com/iron-powder-toroids/

Attached Files

• Liked by
Vidura posted this 15 September 2019

Hi SL and All following, Indeed this circuit is a valuable exercise where a lot can be learned, Until now I haven't discovered anything abnormal anyway, all the behaviour can be explained with Faraday's induction Law, also the simulation should run ok provided that you take out Kirchhoff's law, which only applies in the specific case that d/phi =0 Regards Vidura.

• Liked by
solarlab posted this 15 September 2019

Vidura - excellent observations (very good points for sure).

Briefly; Spice type simulators generally provide three analysis:

(1) Transient - Non-linear Time-domain Analysis, where components are represented in differential or integral form. Spice performs an Ordinary Differential Equation (ODE);

(2) DC Analysis, reactive components are treated as shorts (inductors) and opens (capaitors);

(3) AC Analysis, complex admittance replaces real conductance, capacitance becomes jvC and inductance 1/jvL.

BUT, a changing Magnetic Flux (Faraday's Law of magnetic induction *) affects the Branch Equations which breaks Kirchhoff's Voltage Law - the electric field becomes non-conservative (voltage is undefined).

Therefore; an Electromagnetic (EM) solver is needed.

Jaqau - We hear this "quote" over and over ,but take note that none of these experimental scientists developed any theories , so, obviously non of their non-existant theories were erroneous. They merely reported their observations - Tesla included.

Others thankfully did develop theories and backed these up by showing the mathematics, physics and experimental data. These are the theories we use today for useful application.

Not to be harsh or obtrusive, but we have seen many "OU observations - coils lighting light bulbs on Youtube" for well over 10 years and it has all resulted in, well, "0" - z e r o !

We've also heard lecture after lecture from many self proclaimed experts in the OU field telling us how it all works by simple hand waving and such - no math or real science; only their profound chatter and sometimes even convincing ramblings, but without any engineering, mathematics. physics or other science that would be of value for replication or further design effort.

Just - IMHO of course...

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Vidura posted this 15 September 2019

Some do experiments , some investigate or develop theories and others works on engineering or building solutions and designs and again others want to bring a readymade device on the market. The last task might not be possible until the time is right. This is all OK, that is the way things are happening, we should thus act as a team and each one do the best in his possibilities according to his skills and knowledge, and respect and support those who work in a different field. Personally I dont have much mathematic knowledge, but I try to catch up a little, or I seek help sometimes, as I found it to be a useful tool in occasions, but I also agree that things are tend to be overcomplicated and attempted to  be explained in large structures of formulas , although that the very same concept might be erroneous. Sorry if I got off topic, feel free to delete Chris.

Regards VIDURA.

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Chris posted this 10 November 2019

Hey HP,

Yes, three Current Measurements need to be taken:

1. Input to Coils.
2. Coil one.
3. Coil Two.

I hope this helps.

Chris

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Chris posted this 09 June 2017

Hi.  I have a few questions:

Input voltage / amps, how much?

Coil wire gauge?

What capacitor to use?

Also, what are each of the white blocks in your replication?  Can I see the entire picture?  Like what the wires are running to as well?  It's easier for me to see it, in addition to reading the schematic.

Thank you,

Thanks for the questions Parkham!

The Blocks: Ceramic Power Resistors, 2.2 Ohms for the big ones 10 Watts, 0.1 Ohms for the smaller resistors, 5 watts.

I just used what I had laying around. Just experiment with it till you get the best result. All my wave's measured were sine wave, so no problem with transients.

My Coil turns:

• Turns: 175
• Turns: 88

Note: Turns N, with Current I, equates to the Magnetic Field B, so more turns is better most of the time, just up the Voltage so more Current can flow. The reason I say this, is, its possible to have an experiment where the total Magnetic Field is in sufficient to induce an EMF across the second coil and the Input Current dominates! This means a failure!

This is such a simple experiment, and so much can be learned, if done properly! One can learn a lot about Negative Power Factor, this experiment is the basis for Electromagnetic Induction! Electrical Transformers Work on these exact same technologies!

For someone to say "This experiment does not work", is basically saying that Electromagnetic Induction does not work!

An example of this sort of stupidity:

This is Tinman's effort to replicate the Mr Preva Experiment. It simply is embarrassing! He is saying that Electromagnetic Induction does not work!

After a lot of Down Votes and pressure from people with brains, Tinman tried again, and still failed. Again saying Electromagnetic Induction does not work! Tinmans colleague, Itsu, has however done some excellent work! Showing that, Indeed, Electromagnetic Induction does work as has been stated for some 187 Years, and do in-fact have a valid Law in Nature, thanks to Michael Faraday:

MrPreva replication 1 :

MrPreva replication 2 :

MrPreva replication 3 :

MrPreva replication 4 :

MrPreva replication 5 :

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Chris posted this 09 June 2017

It is a RLC Resonant Circuit, the Cap and Coil Combination are tunned for RLC Resonance.

So DC Pulsing is possible, an Audio Amp driven with a Sine Function Generator is also another good way to do it, I used this method.

As long as the Cap and Coil are in RLC Resonance, then it doesn't matter what the Circuitry is. Switched DC 50% Duty will be difficult to get RLC Resonance depending on the Circuit, so the Audio Amp is a good way to go.

Chris

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parkham posted this 09 June 2017

I'll check the videos, thanks.  I was going to attempt replication using the exact figures on the first diagram - 7 turns and 11 turns before doing any further experiments.  If I do that, any suggestions on what I asked about earlier?

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Chris posted this 09 June 2017

I'll check the videos, thanks.  I was going to attempt replication using the exact figures on the first diagram - 7 turns and 11 turns before doing any further experiments.  If I do that, any suggestions on what I asked about earlier?

My only suggestions, same as before:

Learning is a ton of fun, this is still today one of my favourite experiments! So simple, so Valuable!

In the specific case of positive charges moving to the right and negative charges to the left, the effect of both actions is positive charge moving to the right.

Current to the right is: I = da+ / dt + da- / dt.

Negative electrons flowing to the left contribute to the current flowing to the right.

Chris

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Chris posted this 28 July 2017

Hey Cd_Sharp, Zanzal - Excellent!

Cd, nice setup! The time rate of change is key, of the Magnetic Fields, and if there is not a gradual Rate of Change then yes there can be a lot of funky stuff happen.

For example, a Sine Wave has a gradual change over time, but a Square Wave has a fast Rise and Decay time with a DC (Off Time) in between. This is where the Coils see no relative change. However in saying this, the Current in the Coils do take time to build, ramp up and this can give a similar effect. The following video is an excellent example of what I mean:

Each little rectangle under the curve is a Change in Time. Lots of small ones with small changes is a gradual Change in Time.

I hope this helps some, I found this helpful when I was studding this. This is why the Cap helped in the Brightness of the Globes...

Scope and the connection, I would only guess there may have been a Ground Loop, shorting somewhere, through the ground connection.

Your two Ground Clips need to be on the same branch. Same piece of wire at the same place. Then you should be ok, unless there is something else going on.

Something like this:

Your Globes are both different brightness's so that is an indication that the Currents are greater in one Branch that the other!

Youre right, this is a very important experiment! If there is anything to be learned, this experiment can show you! It is simple, cheap and very easy!

Chris

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Chris posted this 31 July 2017

Excellent work there Cd!

Isnt this the best experiment! It is beneficial in so many ways! With the Magic of the Ocilliscope, we can Click our Fingers and Freeze Time! When Time is Frozen, we can look at the Current, and the Coils, and we can use the Right Hand Grip Rule to see in what direction the Magnetic Fields are. You should end up with this:

This is the beauty of Science, we have most of it correct, we just need to fix some mistakes, typically the assumptions made.

I too am guilty of assumptions sometimes, but I realise that my assumptions are not proof!

Chris

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cd_sharp posted this 04 August 2017

In fact both coils are ccw, but moving away from each other, so they buck.

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Chris posted this 13 August 2017

Hi CD - Very interesting question with some more interesting results!

Some rough math on my setup above, shown below:

L1: 31.8mH
F = 1/2 Pi Sqrt(L C) = 1 /  2 * 3.14159265358979 * 0.00069065186599328 = 230.44 Hertz, So our result is not far away, including the Damping Factor ζ (zeta) 297 Hertz

L2: 16.6mH
F = 1/2 Pi Sqrt(L C) = 1 /  2 * 3.14159265358979 * 0.000498998997994986 = 318.948422204035 Hertz

I simply did not take this far enough, this was quick and dirty guesses with no verifications at all. I did not check L1 - L2 = Lprime as the Inductance for the equation, although I should have...

Why should I have done that? Because each Inductance will cancel... Maybe we could do this here?

Either way, we are still some ways out from the resonant frequency even with the Damping Factor.

Edit: Oddly, if I half each inductance, then add the two, I get: 264.16Hz

Chris

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Chris posted this 05 November 2017

Hello Anothercat and Welcome!

Excellent Video thank you for sharing!

Chris

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Chris posted this 30 August 2018

Hi P,

CD is right, da+ and da- is the change in Charges, both Positive and Negative Charges. If you have a look at the quote from the document, there is direct reference to Charge in the Conductor and its movement over time.

I have had a few people try to argue with me on this, trying to explain this away as nonsense, the funny thing is its a proof of concept experiment that can be done on the bench in 10 minutes.

There is only one site I have come across that has Current ( I ) depicted correctly:

All sites say a Capacitor has two charged Plates, one Negative and one Positive, but the depiction of Current is a singular entity with singular flow... Surely and misconception in Electronic Engineering that has been missed by the masses!

Reading this thread a few times and doing the experiment it all makes perfect sense. A logical sane mind can not argue with proof!

Chris

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Chris posted this 17 September 2018

Jagau and Vidura are Correct!

There is no complication to this! The principle is universal, the Time Rate of Change of the Magnetic Field, which is analogous to Current:

### V = L di / dt

Voltage ( V ) is the product of the Inductance ( L ) multiplied by the Time Rate of Change ( dt ) of the change in Current ( dI ):

Where does the Excess of Current come from, Electromagnetic Induction! We see the exact same principles in Circuit Theory:

Parasitic Inductance, something Engineers have struggled with for ever. They try the best they can to eliminate it, Truth is, its always there, they can only ever reduce it! Its the Time Rate of Change of the Magnetic Field, Electromagnetic Induction inducing Voltages on Traces that are close and as a result stray signals interfere with Circuits, an unwanted situation, thus the term Parasitic!

I see Confusion, and posts that are over complicating simple straightforward fundamental Science! Please, ignore complication, a simple answer exists for all things!

Vidura and Jagau are correct, we have a simple explainable and provable answer, there is no need to make simple things complicated!

Chris

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Chris posted this 18 September 2018

Hey Vidura,

Do you mean the Thread: Some Coils Buck n some Coils DONT

You're right, many threads here are based on this Thread! I think most here would agree we have broken ground, we have thoroughly investigated this and we have volumes of data on this phenomena!

Yes, CD's Thread also is based on this Tech: Finding the LL resonant frequency

I don't want to bore the members that have already read and researched this Tech, but for the new comers, there is a lot to be learned! A lot to experiment with!

Chris

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patrick1 posted this 15 September 2019

Solarlab i hear you on the lack of results. -  i just had another set of failed experiments, with the highest resistance coils ever.,  660ohms an 230ohms pair.  - i dont mind failing, - my problem is, that i am not learning anything from them,  i have no path too victory via my own work with bucking coils.   lots of excitement and theorys  too test. - but its hard too keep going with no real goal,  just shooting in the dark.        my metglas has arrived, and im going too be trying the same kind of things with that. - but honestly i still have no idea what i am doing.....     i guess i take the disheartenment on the chin, its all for a good cause.  but hard too keep doing, especially with what seems like fantastic resources here being in such great abundance ;=)   nows the time....

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Andrew posted this 06 March 2020

Hmm...

Only a marginal difference in brightness...

Not enough volts? Or turns? Or both?

Need a new multimeter - just realised i cannot measure AC amps...

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Ere many generations pass, our machinery will be driven by a power obtainable at any point of the universe. This idea is not novel. Men have been led to it long ago go by instinct or reason. It has been expressed in many ways, and in many places, in the history of old and new. We find it in the delightful myth of Antheus, who drives power from the earth; we find it among the subtle speculations of one of your splendid mathematicians, and in many hints and statements of thinkers of the present time. Throughout space there is energy. Is this energy static or kinetic? If static, our hopes are in vain; if kinetic - and this we know it is for certain - then it is a mere question of time when men will succeed in attaching their machinery to the very wheelwork of nature.

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