induction hobs back in stock at Lidl.

http://www.lidl.co.uk/en/our-offers-2491.htm?action=showDetail&id=38922

... but today and tomorrow only.

I built this exactly as the instructions said to do it.  I tried Bi-filar & non Bi-filar & got
about the same wattage as I put in.  Absolutely NO O-U.

The only thing I got was burned fingers from the overheated coil.  LOL
                                                                                                                                        .

 This is because you did not make the bifilar coil RIGHT.

 Tesla Quote "In order to produce the greatest possible movement of electricity through a region of the earth in accordance with the plan involving use of a single terminal oscillator, as here experimented with, it is desirable to obtain in some way a large capacity on the free terminal. This is connected with difficulty as spheres get to be too large with moderate tensions and when the tensions go into the millions, streamers can not be easily overcome. The streamers involve loss of pressure just as leaks would on a water pipe which is closed at one end. Large capacity is obtainable in a number of ways of which some are:
 
 1) a coil wound for maximum capacity (internal). The turns are so disposed that between the adjacent turns of layers there exists a great difference of potential, as much as the insulation can stand."

 So to have a bifilar coil you need the wires in parallel. One coil always being separated by the other. An easier way to see this is this. One coil is solid and the other is dotted. The first pass of energy goes into the center being separated by the second coil which receives the first coils discharge to flow back into the center again and out the second coils end.
 You failed to see anything because you didn't provide the additional capacitance needed in the first coil to negate the self inductance of that coil. The capacitance is provided by the two coils woven in such a way that each turn is separated by the other coils turns.
    Like in this example in picture below.

 The post I replied to was from the quoted guy and he showed the coil he used. Flat two conductor speaker wire not in a bifilar method but a split coil one on top of the other. That will not work as a bifilar since the inductance is twice the inductance of the single coil with two in series connection. Then he states it doesn't work. It would have if you took the time to understand the bifilar coil and actually built one.

 Now back to the quote of Tesla's:

 In order to produce the greatest possible movement of electricity through a region of the earth in accordance with the plan involving use of a single terminal oscillator, as here experimented with, it is desirable to obtain in some way a large capacity on the free terminal. This is connected with difficulty as spheres get to be too large with moderate tensions and when the tensions go into the millions, streamers can not be easily overcome. The streamers involve loss of pressure just as leaks would on a water pipe which is closed at one end.

 Here he talks about his experiments with single terminal oscillators and how he got rid of the huge balls needed to run the system. Curious that he uses the bifilar coil in a single wire mode and the increased capacitance in the bifilar coil can be used to replace the ball in that system. Could you wrap an additional coil around the bifilar and harvest the electrical signals off that single wire system as well?

Now, to harvest high potential electricity and convert it to a more manageable form is a question I think I may have solved. How many have heard of another high frequency coil designed for the purpose of reducing high voltage to a much lower voltage?


It is called a D'Arsonval coil, and I think a system built around one (or more than one if necessary) might even be usable if designed properly to even convert static discharges into a usable form. The D'Arsonval coil is a step-down type auto transformer originally designed for quack electrotherapy in the early 1900's.


It helps being conversant with the various coils and builders of the day, of which Tesla got the ball rolling, so to speak. Most people that claim to build Tesla coils are actually building Oudin coils, as a for instance.

Induction hobs back in stock at £29.99 but only for a few days. At Aldi UK.

https://www.aldi.co.uk/ambiano-single-induction-hob/p/076535129038100

Hi All
Jean Louis Naudin is back with a replication of some russian induction heater cookplate
Tesla spiral bifilar coil transformer experiments
where it seems the output power is muchh bigger than the input power.

Here is his website about it:

http://jnaudin.free.fr/gegene/indexen.htm

and here is his youtube video about it.
http://www.youtube.com/watch?v=4W2ABWjeTrk

Here are the 2 referenced videos by the Russian experimentors:

http://youtu.be/6rzUnQ4v9z8

http://youtu.be/yT16-togIhw


Now the question is what kind of waveform does one get at the output of such
a flat Tesla spiral coil ?

Especially when the primary input coil in the heater unit is pulsed at high frequency
and the coil that Naudin has built is put into resonance ?

Are the eddy currents going into resonance and extract any heat energy from the environment
with it and convert it to electrical energy so the electrical output energy is higher than the input energy into the cooking plate coil ?

Hopefullythis will not just be any measurement errors again...
But both power meters show 1000 Watts input the one inside the cooker and
the other on the grid line...
Hmm...

Is it really so easy to get 1850 Watts of free electrical power this way

What do you think ?

Many thanks.

Regards. Stefan.

In vis video is error in meashurements.
For example take this image http://jnaudin.free.fr/gegene/images/gegene13gvtg.jpg
From peak to peak is 370 V. So now divide from 2 is 185 V. Now is multiplie 0.7 to give RMs of 24 kiloherc is 129 volts. Now 129 multiplae 0.7 to give  RMS of 50 herc and is 90.65 V
So true RMS is not 131 V, but 91 V. And with curent http://jnaudin.free.fr/gegene/images/gegene13hcur.jpg is not 14.8 A, but 11 A I calculate. So tru power acording my calculations is 11 x 91=1001 W while input is 1155 W http://jnaudin.free.fr/gegene/gegene18en.htm
 

Here is corect meashurement metod http://jnaudin.free.fr/gegene/gegene05en.htm
and here he not get overunity.
 

The business of using lightmeters and light bulbs seems very unsatisfactory. Why he doesn't use a resistive load and measure the rise in temperature of a tank of water is beyond me.

Why incorect with light meter? If light meter position same, lamps position same. So lighmeter Must show same value on same power. Naudin set seme lightmeter readings with power from variac and meashure consumption power and with induction and meashure poer and from variac is less power consumption, while lightmeter showing same results. So thats wrong?

Light meters are very sensitive to distance (inverse square) and angle to the subject. They must be mounted and bolted in position to show any chance of a dependable result.

Their readings depend on whether they are being used in incident light or invercone mode. The former is pretty much to be ruled out.

It is much better to measure the electrical power in the cable or to use  a resistive load plunged into water and measure the temp increase using standard lab techniques.