Regarding wires,

All my wires are insulated wires. None of them is magnet wire. The reason is simple. In magnet wire once you wind and add the insulation coating, I'm told that it is not possible to use it again. It is a one time set up. In insulated wires we can wind, rewind and built various types of windings and check again and gain. Of course they are costly but going in for magnet wire will not enable us to do many types of experiments as we wish. We also coil by hand not by machines.

Quote from: dieter on March 02, 2014, 08:39:37 AM
Marathonman


When you pump a  pure dc pulse into a coil, the collapsing field between the pulses will cause a polarity change in the back emf, you will always have to deal with ac. If you block it with a diode, it will get hot and waste energy. Where did you read Figueras had AC Generators?


In your drawng there the coils are facing two diffrent poles, neutralizing eachother. When you vary the voltages, you may rescue some of the energy, but not much.


In a generator there is indeed a similar setup, the inductor coil ends face the inducted coil ends and the inducted ones will move along continously. So sometimes they are facing s to n completely, or n to n, this is the peak in the output. Any constellation in between, like your 50:50 overlapping does reduce the inductive coupling significantly. In your setup, the energy output will be higher if you disconnect every 2nd primary.


Then the cores  don't face eachother, but get close only at the edges, this is not how induction works.


Seriously guys, you seem to love to theorize and completely ignore the fact that there's an existing, working prototype that was presented to you including all data.  You tell me my practical device is wrong and your theory is right. Is that openminded? No it's absurd.

Dieter this device should not produce any big coil discharges because the brush is in contact with two wires from the resistor array at any one time, and the DC will be applied and removed slowly, the decline will be orderly.

Besides that the Coil discharge is not back emf it is forward emf, while there is a kind of reversal in the polarity of the coil the output voltage and current is always the same polarity with respect to zero, the voltage reversal happens when the coils discharge causes the the negative end of the coil to increase in voltage to above the supply which is the positive end, although the voltage is still positive with respect to circuit ground just like the supply end of the coil is positive in relation to the circuit ground. Notice in the scope shot there is nothing below the zero volt line on the scope so nothing goes negative with respect to circuit ground. The only voltage polarity reversal is across the coil and only because the discharging coil negative end suddenly has a voltage higher than the supply voltage, the current out of the coil is the same direction of flow as the current into the coil.

See this post here http://www.overunity.com/14343/silly-question-about-voltage-and-current/msg390335/#msg390335

The circuit showing the scope probe placement is in the link below.

I also attached the scope shot here of a DC pulse to a coil and the resulting current when the coil is discharge to a higher voltage battery. And the resulting current when the coil is shunted back to the supply can be seen here. http://www.overunity.com/14343/silly-question-about-voltage-and-current/msg390199/#msg390199

These shots were originally made because I realized I had made a bad observation concerning incorrect scope probe placement and these shots I made to rectify and admit my mistake. Just to explain.

Blue is voltage yellow is current through the coil on coil charge and through the discharge diode on decline. Notice the current rises and declines in an orderly fashion. Even in the snubbed version of the experiment in the second link although in that case the current never stopped there was about 800 ma of circulating current with the switch off.

Cheers

Hi:

By the way it is enough if I know how many turns are needed for a 4 sq mm wire to coil around a 4 inch dia tube of any length. I have many tubes of 45 cm to 50 cm length but we can buy 1, 2 or 3 meter ones.

If the number of turns is very heavy for the primary, can we increase impedence by making bifilar, trifilar or quadfilar coils just we did earlier.

Can we reduce the gauge of the wire to increase the DC resistance to about 12.1 for a 1.5 sq mm wire for the primary. In that case how many turns are needed for a single core, bifilar or trifilar wire.

The point is that I want to build a cheap system that I can share with all in full details so that it can be replicated and tested and verified.

For a person not knowing any thing, this recognition is sufficient. Also I intend to build a self sustaining electrical generator which is considered laughably impossible. Not millivolts and milliamps but in many horsepower device like Figuera and Hubbard did and put up videos and explain every bit of it if I succeed..That is a big if I succeed really.

I hate to say it but the early 1900's was the era when many people experimented with radioactive substances such as radium and electricity production. eg Stubblefield killed one of his children with contaminated food due to his experiments and poisoned his entire family. Maybe the Figuera device used the same kind of radioactive gain and this also led to his death. There would be no need to disclose that to the patent examiner if the device is demonstrated to work, eg Stubblefield got patents and I don't think he disclosed he was using these extremely hazardous materials. Also some other free energy devices have been shown to or highly suspected of using radioactive materials, this was before they realized how dangerous it was to people, Madam Currie is an example she died from radiation poisoning due to experimenting with radium.

Something to ponder.

This quote below I think came originally from Keely.com, but that link does not work for me, I can't get to the old Keely.com website anymore.

Stubblefield ended up staving to death in a hut by himself after his family abandoned him. I hope he had fun. He killed a child he named after Nikola Tesla. Price of progress ? Price of free energy ?

QuoteIotaYodi:

Im going to add this.
This is an excerpt from an article about Stubblefield written by one of his grandchildren:

Grandpa was now once again blamed by his wife of 36 years for accidently poisoning three of their nine children through inadvertencies. Neither, at the time of their experimenting with various mixtures of Pitchblende and salt crystals within their 85 farmland soil, knew it was contaminating Teleph-on-delgreen. From 1881 to 1906, the soil-coil RF antenna "hotspots" -- that made it possible for Grandpa Nathan Stubblefield to develop and patent the 1898 induction earth batteries and 1908 Wireless Telephoneâ,,¢ -- did contaminate their foodstuffs and water.

It wasn't until 1906 when their son Tesla died teething on a potato from one of the RF antenna "hotspots," -- that they realized that it could have been the RF antenna "hotspots," mixtures of Pitchblende, salt crystals and other active metals that created the healthy looking but tainted vegetable gardens. The watermelons, tobacco and other vegetation they had commenced growing and selling since their courtship in 1880, when he was 20 and Ada Mae, 16 years of age became an invitation for both invention and the destruction of a family.

They couldn't shake the sense of dread, so Ada Mae on their 36th anniversary, 1917, left Grandpa Nat stranded. He moved his gear to a one room hut and became a stranger than fiction recluse. On summer nights, he would shock his neighbors by lighting up hill sides from his hut, with his buried RF induction transmitting coils.

One wonders what he did to the ground, the batteries as patented could not do this.

Hans von Lieven
http://keelytech.com/stubblefield.html

..

NRamaswami,


4mm2 Wire is massive! For effective transforming / induction you need to have great lenght of wire in a very small space, so the magnetism of all turns will cumulate to high density. You choose a thicker wire only when it is getting too hot. Also plastic insulation of wire is too much space between wires. Enameled (laque coated) copperwire would be desirable. Hint: people often trash their microwave ovens, they have 2 big coils inside which would cost like 70 $ to buy and can be reused after some disassembling ( be careful with the hv capacitor in there).
Sometimes the core sheets are welded together on 4 lines, this needs to be filed off.


Anyway, I am not good in calculating coils, but there are many online calculators, just google "coil calculator". Here's one for instance:



www.66pacific.com/calculators/coil_calc.aspx

Some of them may be able to include the core in the calculation.

Core size I think should be in good proportion to coil size, eg. 1 inch core and 2 to 3 inch coil diameter. So the core can be saturated and the coil has the mass to pick up a strong magnet field.

Shadow129g,

good luck with your commutator! I probably will build one too, because it makes it so easy to have a stabile 90 degree phase shift, where with the cap method you have to adjust capacitance as soon as you alter frequency or input current, and finding the right capacitance takes time and money.

The good thing is, the brush will never go from zero volt to full power, but increase/decrease in steps, so sparking should he minimal (the more segments  the smaller steps of change in voltage). A highly heat resistant metal should be used, like the spring and wire in piezo gaslighters. Sparks may be around 2000 degree C. There are several metals that can stand this temperature.

One needs skills to make a good commutator, but it may be well worth the effort.

Anyway, got to do further optimations here.

I stepped up the output of my prototype to 200 VDC and the curtent still reads more than 250 mA, but I am not sure if I can trust this ampere meter, althouh the current of a AAA Battety was measured relatively correct.

I don't give too much about these numbers, but I definitely know that the prototype has interesting features. The flux is so perfect, that it is completely canceled out when you run it without 90 deg. phase shift of one primary, it works as a transformer when only one primary is active, but it shows a very unusual boost when both primaries are active, one with the phase shift. I wasn't even at exactly 90 degree and already trippled the output, so I really wonder how it's going to perform with precisely 90 degree from a commutator.