Grum has offered to run the dedicated thread once it gets to that point.
hopefully next few weeks

Hi Chet.

Yes indeed, I bought 3 of those large spheres with the express intention of joining in on the build with Itsu.

Looking forward to the “ heads up “ ....

Cheers Graham.

https://www.youtube.com/watch?v=_AtYEz6PrKs

This one is interesting regarding the 'yoke' and how it's wound.

Tinsel, i wonder if Rigol has taken any EM protection measures for their oscilloscopes. I noticed my inductance meter showing me numbers while it was off of power supply, and i just wondered if Rigol is protected. This wireless device when works interferes badly with the surroundings.

Jeg,  guys, 

i don't think there is a scope which is EM protected on its input as it would defeat the whole purpose of a scope which is to measure (small) signals.

So a word of warning;
be very carefull with your equipment with these kacher/tesla coil like devices as they can damage them.
This includes any PC's, printers, smartphones, dectphones, DMM's, LCR meters, scopes, powersupplies, etc.
Keep them well away from any working kacher/tesla coil.


Itsu

1. Many of the attempts at electronic "overunity" devices have, at their roots, pretty much the same principles. Don Smith, Kapa, coil-capacitors, Moray, etc. all seem to me to be grasping at the same theoretical principles, which are not really clearly articulated by the originators or understood by the "replicators". The fact that the waters are muddied by apparent frauds and fakers is not helping matters either. One of my motivations behind publishing my "EEEE" idea is to make these principles explicit and instantiated in an apparatus that is deliberately designed to illustrate them in an understandable manner. However, as I have always said with respect to the EEEE as published up above, this is only a proof-of-concept demonstrator, and to be able to see real, measurable entrainment effects one may need field strengths orders of magnitude higher than this simple apparatus is able to attain.

2. Fixed-frequency drivers will not be able to track changes in resonant frequency caused by variations in environment, by changes in inductive/capacitive coupling to other circuitry, by extraction of usable power, by streamer or arc production, or other factors. Only auto-resonating driver designs can automatically compensate for these factors by adjusting drive frequency to maintain true 1/4-wave resonance to achieve VRSWR (voltage rise by standing wave resonance) . The "Kacher" is one such very simple autoresonating design, and the slightly more complicated TKoil X driver circuit is another. Even more powerful autoresonating designs using half- or full-bridge final output stages of mosfets or IGBTs have also been proposed and some of our real builders are working on such driver designs. The SSTC websites that give details of these designs have been posted here several times.

3. To get maximum performance from a "tesla coil" type 1/4 wave resonator design, the primary driver must be able to achieve the highest rates of rise and fall times, or to put it another way, maximum dv/dt. This means as "square" (or rectangular) a drive signal as possible. The Kacher, using a single transistor whose base is driven by feedback from the secondary resonator, can't really do this, as its base drive will usually be more of a sinusoidal signal as it is derived from the pure sine wave of the resonator. More sophisticated designs, like the circuit used in the single-transistor TKoilX and the other Steve Ward designs using half- or full-bridge architectures, don't suffer from this problem because they use driver chips that generally have Schmitt-trigger stages that "square off" a sine or slowly varying signal to make the signal to the mosfet gates or IGBT bases to have high dv/dt transitions. Hence they achieve higher voltages in their secondary resonators. Higher frequencies do not necessarily help because the power bipolar transistors, mosfets and IGBTs may not perform as well as frequencies get higher. In Tesla's day, even a few hundred kHz was considered "unimaginably rapid oscillations", whereas today we routinely work with 1 or 2 MHz devices, and the real action is up in the GHz range, well beyond anything we can hit on the bench. We also need to be aware that we are working with frequencies that may conflict with AM broadcast radio bands (500 kHz - 1.5 MHz or so.)

4. Yes, as you achieve true VRSWR in designs that are deliberately intended to transfer power through space... they will transfer power through space! This is one reason why Tesla's power transmission system wasn't practicable for everyday use: Pretty much everything in the environment becomes a receiver for the transmitted power, with more or less efficiency. When you are transmitting megawatts of power, even a metal bookshelf or table may become a very inefficient receiver that still can intercept hundreds or even thousands of watts inadvertently. This is even more true for sensitive electronic equipment like scopes, computers, cellphones and other devices we tend to take for granted. Even in our small table-top demonstration devices, while _average_ power may not be that great, there can still be huge levels of _instantaneous_ power in the form of huge but short-lived spikes that can damage sensitive equipment. So bear this in mind while running your systems, and remove scopes etc. from the near vicinity of your transmitters. If you want to see what your frequency is, you can pick up enough signal using a scope probe that is simply connected to a piece of aluminum foil suspended a couple of meters away from your resonator, with the scope even further away. There are other precautions one may take, such as placing "shorting" BNC plugs onto the inputs of your scopes and spectrum analyzers to protect the inputs by physically grounding them. Beware of scopes that don't really "ground" inputs even when "ground coupling" is selected in the Coupling menu... like the Rigol 1054z for example. Distance and proper grounding/shielding are your only protections from extreme high voltages, especially when deliberately transmitting power through space.

Tinsel thanks a lot for all this info. I'll make some shorted BNC connectors asap.

Insert Quote
https://www.youtube.com/watch?v=ozGwb0glcXg
https://www.youtube.com/watch?v=2qKkqzOuAOU
https://www.youtube.com/watch?v=rGnXjOlFbVM
https://www.youtube.com/watch?v=t16iv0CZlfk
https://www.youtube.com/watch?v=G7zuo25_mZA
https://www.youtube.com/watch?v=TVDsRP7C8tE

Belfior : It would be so nice to have some kinda translation on these


I use it as a Google Translator.

I know there are many members of this cafe who speak Russian and English.
Please ask them.
Thanks ^: ^