Joulethief SEC exciter and variants

[lamare]

I fail to understand ow you are accounting for the negative resistance effect of the MPSA06? As seen in an authentic SEC Exciter the Vce breakdown is playing a significant part in the operation. In an authentic SEC Exciter the utilization of the two 1N4148's and the White LED serve a purpose of limiting the negative spike to ~0.7+0.7+3.6. Whereas in the slayer circuits it is used to prevent blowing the transistor from excessive feedback. Where a double set of diodes are used in reverse configuration in a slayer exciter, the operational bandwidth is greatly reduced and the diode in the same polarity as the BE junction serve little practical purpose as the Vbe is the controlling breakdown potential, they do although not shown in any sim act as a small varicap when reverse biased, yet this is very small and only of value at UWB frequencies.

To be honest, I don't understand the part with negative resistance effect, so I can't comment on that. I did see significant differences in the spectra of different transistors in the simulator, so I just wanted to mention that. These may or may not show this negative resistance effect. I don't know. All I know is that these two show similar results in the FFT on the simulator as the MPSA06, so if you/someone need a replacement, these might be the first ones to try.

[woopy]

pancake results

Hi all

I have tried all my small transistors. the best is the 2N3904 for small voltage range and low current.

But to go much higher 24 volt and probably higher i used the TIP 31 C. With 300 ma i can light my 60 led ramp brightly, plus at full brightness the led across B and E of the transistor (see on the right of the pix), and i can light wirelessly a CFL . Very good for a so compact config.

I could not get a FET working (have to test more)

The same TIP 31 C and my Slayer exciter is stronger, but get much hotter and draw much more current for less volts (10 volts and 650 ma).

So very different output and very interesting stuff.

What do you think of winding a bifilar Tesla pancake of 100 turns in 0.3 mm copper. Actually my coil is 70 turns with o.4 mm copper.?



Laurent

[lamare]

I have tried all my small transistors. the best is the 2N3904 for small voltage range and low current.

Interesting. That is exactly the one showing the largest bandwidth in the Spice simulator, comparable to the MPSA06 in that sense.... (see: http://www.energeticforum.com/renewa...tml#post114813 )

[Goldfinder]

Help with Stiffler towers

I have scoured the net and still haven't found anyone describing how to build the Stiffler towers. If someone would please provide me the specs. Lidmotor has demoed lost and so has Stiffer himself. but no specs. I could guess but would prefer actual specs so I can do a decent duplication.

PVC pipe length
Coil - number of turns
Coil - Wire size.

Thanks in advance!
Goldfinder

[DrStiffler]

I have scoured the net and still haven't found anyone describing how to build the Stiffler towers. If someone would please provide me the specs. Lidmotor has demoed lost and so has Stiffer himself. but no specs. I could guess but would prefer actual specs so I can do a decent duplication.

PVC pipe length
Coil - number of turns
Coil - Wire size.

Thanks in advance!
Goldfinder

@Goldfinder
I even think you sent us an email stating you searched the earth for this info, yet a simple click to my web site or to Scribd for the Wireless-OneWire-Energy-Transmission-Construction-Guide posted there in July 2009 would have answered you question. Crazy on such effort......

[Jiffycoil]

Hi all

I have tried all my small transistors. the best is the 2N3904 for small voltage range and low current.

But to go much higher 24 volt and probably higher i used the TIP 31 C. With 300 ma i can light my 60 led ramp brightly, plus at full brightness the led across B and E of the transistor (see on the right of the pix), and i can light wirelessly a CFL . Very good for a so compact config.

I could not get a FET working (have to test more)

The same TIP 31 C and my Slayer exciter is stronger, but get much hotter and draw much more current for less volts (10 volts and 650 ma).

So very different output and very interesting stuff.

What do you think of winding a bifilar Tesla pancake of 100 turns in 0.3 mm copper. Actually my coil is 70 turns with o.4 mm copper.?



Laurent

Nice work Woopy. I wound a Bifilar pancake coil yesterday.

YouTube - Bifilar Pancake Coil driven by Bedini circuit

[woopy]

the red tesla bifilar coil ready to go

Thanks Jiffycoil

i made one of those coils

the two winding separated are each 4.8 ohms and 0.47 mh. and than connected in serie as per Tesla coil
9.4 ohm and 1.84 mh.
I do not know the turn numbers but it the same diameter as my previous single wire pancake.

Pix 3 is the L2 exciting pancake coil with 6 turns

will test tomorrow

good night at all

Laurent

[Jiffycoil]

Ah that's how it goes. You are very wise Woopy.

[woopy]

Hehe Jiffycoil

I am not so wise but i am able to detect the good and practical advices in this forum

thanks very much for your great contribution in general and especially for this really simple trick how to wind easily a pancake coil with a single scotch tape.

And tomorrow will bring other results good or not good but for sure a lot of fun



Laurent

[Jiffycoil]

Merci Beaucoup.

[Ecoman11]

I'm not really a spatial effects guy but this coil might interest you exciter bugs. All you need is a small hex rod or cut allen key and a drill. It's tedious work but should produce some unique results with a spiral core.



Ecoman

[lamare]

So if I read this right the cores of the two xformers are not mutually connected?

It is basically the same thing as what you/others do with the wireless towers. Only in this case, you connect them directly or trough couple capacitors. See attachment.

[Lidmotor]

Pancake coils

@Woopy
I replicated your two flattened pancake coil design and got good results. It works.

@ Jiffycoil
Your bifilar coil looks like another winner and I'll try that next. There is so much information on packcake coil design that it is kinda hard to filter through it all. Tesla sure did like these things.

Cheers,

Lidmotor

[lamare]

@ Jiffycoil
Your bifilar coil looks like another winner and I'll try that next. There is so much information on packcake coil design that it is kinda hard to filter through it all. Tesla sure did like these things.

I did some analysis on coils some time ago, and found an interesting figure back then:

http://www.energeticforum.com/renewa...html#post59469
http://www.energeticforum.com/renewa...html#post59740

I have always wondered what would be so special about a flat spiral and why Tesla would use such a coil. Now I realise you get an extreme h/d, nearing to 0. Now take a look at this figure, the base of an approximation to calculate the first TEM self-resonance frequency of a coil I posted before:

What you see is that the velocity factor, the relative propagation speed with which EM electricity travels in/out of the coil, in the extreme nears to 0 also!

Very interesting!

What you have with a flat, spiral coil, is minimal capacitive coupling, while still having a considerable inductive coupling between the windings.

Today, I would think it's the other way around and that with a pancake coil you mostly have capacitive coupling and hardly any magnetic component, especially if you use higher harmonic resonances as you do with these kind of circuits, because your driving coil (together with the feedback coil) is the one that determines the oscillation frequency to a large degree and that one is usually much shorter than high voltage coil and thus has a (much) higher resonance frequency.

Update 3: note that Tesla used bifilar wound pancake coils also:
Tesla Bifilar Coil patent - Bedini Bifilar Coil usage in Schoolgirl Radiant Motor Charging devices | MERLib.org

Tesla explains that a standard coil of 1000 turns with a potential of 100 volts across it will have a difference of .1 volt between turns. A similar bifilar coil will have a potential of 50 volts between turns. In that the stored energy is a function of the square of the voltages, the energy in the bifilar will be 502/.12 = 2500/.01 = 250,000 times greater than the standard coil!"

Practical Guide to Free-Energy Devices - Chapter 9

May I also remark that it might be worth experimenting with the “pancake” coil (called a bi-filar series-connected coil) patented by Tesla because he found that it was particularly effective in picking up Zero-Point Energy:

Update: I suddenly wonder what would happen if you would go to 3D coils, i.e. wind them like your grandmother would wind a ball of wool:

Then you would have one terminal in the centre of a ball-like structure, which spirals out in 3D towards the outside.... Of course, you can wind this with an inner bal, surrounded with an outer one...

Update 2:

If indeed capacitive coupling is the dominant coupling mechanism, we would be talking about electric waves propagating from one winding to the next, which would be akin to pressure waves in a fluid, which would have an interesting analogy with acoustics. With acoustic pressure waves, one can make interesting pressure wave patterns, which would be similar to what would happen inside a resonating pancake coil. This is known as cymatics:

Cymatics

This is a 2D pattern:

A simple experiment demonstrating the visualization of cymatics can be done by sprinkling sand on a metal plate and vibrating the plate, for example by drawing a violin bow along the edge, the sand will then form itself into standing wave patterns such as simple concentric circles. The higher the frequency, the more complex the shapes produced, with certain shapes having similarities to traditional mandala designs.

In 3D, we get similar patterns:

The left half of the images show the same kind of pattern, one in 2D, one in 3D. As you can see, you get a hot spot in the centre, so it may be possible to do something similar with 3D ball / wool knot shaped coils.

Update 4: There's an interesting post on this velocity factor and standing waves here:
http://www.energeticforum.com/renewa...html#post37830

The referenced article, link dead, can be retrieved from the internet archive:
Class Notes: Tesla Coils and the Failure of Lumped-Element Circuit Theory

Very interesting:

However, a true Tesla coil (circa 1894) is a velocity inhibited slow-wave helical transmission line resonator: Vmax = S×Vmin, where S is the standing wave ratio. Voltage magnification is by standing waves. Period.

Update 5: There's a very interesting site about Tesla coils here: Tesla Secondary Simulation Project

Update 6: Found a very interesting paper by the same Corum who wrote the Class Notes: "Voltage Magnification by Standing Waves" http://hamwaves.com/antennas/inductance/corum.pdf


Update 7: One more picture on cymatics:
Cymatics : Physics • Rational Skepticism Forum

I like these kinds of images, because I believe there is a real ether, as Tesla always said, so these cymatic techniques enable us to make pictures and video's of how waves propagate trough the medium, be it water or the ether.

[woopy]

Hi all

Thanks to all for contributing ,it really helps to go on understanding what is going on here.

So i made some test today with Slayer and joulethief circuitery. And i have made a small vidêo to show with less words something very interesting with those pancake coils.

Perhaps the pancake coil à la Ecoman will bring better results ? who knows ?

And good experimenting

Laurent

YouTube - bifilar Tesla pancake wireless coupling.wmv