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Hello all
Crucial  knowledge that I have gleaned from the internet over the past few years regarding magnetic fields and inductors is:
1: Usable energy from magnetic fields in inductors is stored in the gaps between magnetic materials. ie magnetic materials do not store energy they just transfer energy.
So the best types of coil cores for the Joule Thief would have gaps incorporated in them. ie gaped laminate cores or powdered metal cores (the gap is between the metal particles) The coils should to be wound over the gaps for the best result or equally spaced on the powdered metal cores.

Non-gaped laminate and ferrite cores make excellent transformers but poor energy storage inductors.   

See the following
 
http://www.overunityresearch.com/index.php?topic=1171.msg20464#msg20464
 
for the secret behind the Joule Thief and FLEET.
 
The attached diagram is the Output over Input Power Comparison.  Enjoy

I think you have something here.
I have been thinking of something for a while but I dont have the ability to really test it.

Most of Teslas later work involved spark gaps.....these insured a high rate of change but would also require relatively high voltage.

From what I understand the Howard Johnson motor used around 2000V

I understand the Gray conversion tube used 3000V

A joule thief creates a pulse with very high rate of change.
What would happen if someone amplified the output of a joule thief?
What would happen if someone used a joule thief to charge a capacitor to lets say 1000V ......then pulsed that with a signal from a second joule thief.
Any guesses what the BEMF pulses from a 1000V joule thief would be?

It seems to me that if you fed an 1000V joule thief type pulse into the right sized transformer you would  have a delay line generator.

Nothing really new here.......but in my opinion using joule thiefs for the high voltage supply and for the pulse supply would make the circuit smaller and cheaper.

gary

I think you have something here.
I have been thinking of something for a while but I dont have the ability to really test it.

Most of Teslas later work involved spark gaps.....these insured a high rate of change but would also require relatively high voltage.

From what I understand the Howard Johnson motor used around 2000V

I understand the Gray conversion tube used 3000V

A joule thief creates a pulse with very high rate of change.
What would happen if someone amplified the output of a joule thief?
What would happen if someone used a joule thief to charge a capacitor to lets say 1000V ......then pulsed that with a signal from a second joule thief.
Any guesses what the BEMF pulses from a 1000V joule thief would be?

It seems to me that if you fed an 1000V joule thief type pulse into the right sized transformer you would  have a delay line generator.

Nothing really new here.......but in my opinion using joule thiefs for the high voltage supply and for the pulse supply would make the circuit smaller and cheaper.

gary

Dear Gary,
 
The Taiwan LED Manufacturer is improving their LED Hat product shown to use one single battery and prolong the life of that battery many times.
 
That should not come as a surprise to you or the many long time Joule Thief Researchers.  The surprise is that they use Two Atten Oscilloscopes to hunt for the “right configuration”.  That put them in very solid scientific footing.
 
There is a very strong possibility of significant Government funding in the near future.  There is talk of giving every US Law Maker and/or every United Nation Representative in New York a “forever lasting” LED Hat. 
 
Overunity Research will get a boost???  Keep up your excellent work.  Money will seek the experts.  I strongly suggest that you get at least one Oscilloscope with csv file capability or work with someone with such a device.
 
Divine wine is for all.

I thought I might contribute a 'what not to do' maybe save someone in 101 from having a lot of problems.
I was testing my joule theives with an adjustable DC power supply, something like 0-30V and/or 0-3A...
My first one, I wound on about 8 turns of iron fence wire, ended up using about 24 inches of phone patch wire around that, and before I remembered that this thing was supposed to run off of very small voltage (dead AA batteries < 1.5V) I fed this with like 12V+ and ended up popping a couple transistors (they now read open in all directions ) .  I did get this to work, but it requires like 0.06A 0.6V to minimally light an LED.  I tried all sorts of modifications, smaller turns (1inch inner diameter), more wire at the smallest, so my first was 1x, second 2x and third 4x.  The last worked sort of the best, but then when I went back to my first, it had a better spike earlier on.  (yes this is all subjective, maybe i'll try and edit this later to include some pictures.  I finally stumbled on a ferrite toroid.  Wound aobut 2/3 the length of the wire I had been using on it, and wow did that make a difference.  Could light an LED with 0.00A and 0.3V   Limitations of equipment... but I could like 4 with like 0.02A and 0.6V...
 I have a couple 6 meter coils that I put on a iron axel of some sort, and connected the coils in opposing direction just like a JT.... these actually worked pretty well, but required a bit of current to get a good flux exchange.
I did learn intersting things like the more current you put into an Iron toroid, the higher the frequency goes, until a certain point.  With the ferrite, the less current I put in the higher the frequency, so at like ground 0 it's already way ahead of the frequency of the Iron... I think I could turn it down just below it turning off that the frequency would go back up as if on the other side of the low current side of lower frequency.  Defintely bying some real ferrites
Oh the other thing I was trying was seeing what effect magnets had on the core, with Iron there was 0 perceptable effect, on the ferrite, alinging the magnet N/S along the circumferance of the torus was the best performane. (was on a spot the torus that had no windings).  Putting the magnet in various direction in the center of the torus was basically just asking the cirtuit to stop working altogether.  Figured if I had a magnet mounted on the side, good way to adjust the frequency would be to just turn the magnet from aligned along the ring to vertical to the ring (which is basically the same frequency as not having the magnet).  Was playing with variuos configurations with multiple magnets but didn't get anything very useful. 
 
So what to conclude: don't use stranded iron cores if you want a small, elegant joule theif.  You need higher current to get the same magnetic flux induction, or many more windings.
 
Also in all my coils I couldn't use a resistor bigger than 33 ohms connecting the control coil to the base... actually I had to short it with a 2Ohm resistor to get it to work, finally removed the resistor altogether.  The base never went to a high enough voltage to trigger with like any resistance there.  (was using a MPSA06, well was using 2n2222's but blew up 2 of them trying to see if more voltage would make it work; [right if all else fails, use a bigger hammer?])  Was still afriad of putting more than 0.5A through it, but tested up to 0.89 a few times (even at the 1.5V limit on the other side)
 
A person early on in this thread said they had JT's wound on air, copper, everything else and that it was impossible to make one that didn't work; I really beg to differ, I had a horribly hard time making my stranded iron cores work.   And a magnet sticks to it better than to the ferrite core. 
 
Use ferrite!

 
The likely result is that someone from “a backward country” will produce an overunity product and then US will play the catch-up.  It will not take too long.  Some predicted the end of the world would come on December 20, 2012.  It may be the end of the old world that relied on fossil fuel.
 
The scientific evidence is here and can be repeated even in the most backward countries.  Will integrity or arrogance win???

Will integrety or arrogance win?
easy question........arrogance has won every time so far.

Lets say your backward country inventer came up with a great little free energy machine.
At least one of the arrogant people with more money than brains would offer them a boat load of money for it......if the inventer takes the money his invention is never seen again.......if he does not take the money  they resort to charactor assanation and threats.

There is nothing honorable or just about the people that are controling these situations.
If your inventor tries to make money from his free energy machine he will loose the battle........The cards are stacked against the free energy inventer ........and the dealer knows exactly what cards are on the table.

gary

Just thought I would update my information on what I called candy cane coils
I called them candy cane coils because on my first ones the windings spiraled around the stack of toroids like the stripes on a candy cane.

Now I would call them modular coils.
If you have a project calling for a large ferrite toroid but you only have smaller toroids you can split the windings of both the primary and secondary over a number of smaller toroids.

The total number of primary turns VS the total number of secondary turns seems to work out almost as if it was one large toroid.

It can also work to put your primary on 1 toroid and leave a long wire to connect  with the collector........this wire can then go through quite a few toroids......any windings on these toroids become secondarys...... I suggest going for fairly high voltage in the primary if you try this.

If you dont need alot of power from your secondarys just passing the wire going to the collector through the center of the toroids may be enough.....wrapping then around the toroids increases the power but usually lowers the voltage.