Confirmation of OU devices and claims

[Gear]

He is just using the gate driver directly to drive the LC tank.

If the gate driver has Schmitt trigger on input, then is possible to use signal from coil as input to gate driver without need of timer.
But you can not control switching frequency. It depends on coil feedback. Is it the best frequency for that task? Hmm.

Without Schmitt trigger gate driver will pick up any oscillation and will switch randomly which will lead to its own burn out.
And gate driver has its limitations.
But, yes, you can power coil that way for a while but not for larger power needs.

Or you can use timers which has also schmitt trigger on input, like simpliest of all, 555, for the same purpose.

SG3525 has also input pin for timing, not sure if it has Schmitt trigger on it. Probably has. Without it it will react on any noise from outside.

TC4420 is resilient low side gate driver which can output 6A pulsed, I think, which is more than enough, giving output of 100mA or so, for that coil.

[TinselKoala]

Yes for you it is OU. That Video and your questions convince everyone why you are the big expert here in this forum.
What is the next? that you ask that the lighting on your yellowed laboratory is also OU?

You can't prove anything over the internet, remember? I guarantee if you build it right, it will work. Corollary: If it doesn't work... you didn't build it right. QED.

And it's my teeth that are yellowed, not my laboratory.

[TinselKoala]

Since you are new here you may not be aware that this has already been covered, including analysis of the actual current being driven into RF's transmitter coil, and indeed Our Friend, working in another forum, is already using coil feedback for autoresonating as you describe. Further, simple actual Solid State Tesla Coils have been constructed by some of this thread's workers using 555 > TC4420 or IXDD614, etc. > mosfet (or CRT horizontal output transistor, some can work pretty well) > low impedance primary > 1/4 wave helical resonator > elevated top capacity, using antenna feedback to Gate Driver,  to make full Tesla wireless power transmission systems. But there are safety considerations when going this route. HVRF burns are very painful and take a long time to heal, and sensitive test equipment must be protected, as the voltages produced can be two or even three orders of magnitude greater than what RF's system attains.
I think that is one reason why RF didn't get the reception he apparently wanted; most people who are actually building and testing have gone far beyond his presentations long ago. 

But your question is an important one. Is the autoresonating frequency the "best" frequency for the task?


What, exactly, is the "task", and how is it to be accomplished? And how can we tell when we have accomplished it? Lighting up a few LEDs at tabletop distances seems rather anticlimactic.

(The switching frequency of an autoresonator can still be controlled, within limits, by incorporating an inductor or capacitor that can be tuned in the tank current path.)

If the gate driver has Schmitt trigger on input, then is possible to use signal from coil as input to gate driver without need of timer.
But you can not control switching frequency. It depends on coil feedback. Is it the best frequency for that task? Hmm.

Without Schmitt trigger gate driver will pick up any oscillation and will switch randomly which will lead to its own burn out.
And gate driver has its limitations.
But, yes, you can power coil that way for a while but not for larger power needs.

Or you can use timers which has also schmitt trigger on input, like simpliest of all, 555, for the same purpose.

SG3525 has also input pin for timing, not sure if it has Schmitt trigger on it. Probably has. Without it it will react on any noise from outside.

TC4420 is resilient low side gate driver which can output 6A pulsed, I think, which is more than enough, giving output of 100mA or so, for that coil.

[lancaIV]

Question: which is the "power density" from Mr.Friedrichs' coil conept ?
What is the cost per Watt gain,not calculating with 100US$ per coil but with 10 US$/1 US$  ?
Mr.Friedrich presents not an industrial solution, it is ART !

"Energy harvester" gives also ambiental energy collection and are actually relative "cheaper" than his "artefact" !
A FE device like solar/win/water/gravity converter has to be affordable,especially for the 3-4 billions lower income
population worldwide !

The first target for "electricity on demand" : 10 US$ cents per KWh

Second target: the U.S. B2B average KWh electricity price: 5,5 US$ cents

And  finally : 500 US$/€ per KW FE device which by 5% tax and ten years amortization  explores in continuum work each KWh appropriate private household standard electricity for 1 US$/€ cent. !

S o it is even important to develop the 1 eKWpeak household,included heating/cooling- light- kitchen appliances
Going in Extreme : 0,8 KWh daily electricity consume ( 800 Wh/ 24 day hours ~ Wattpeak ? )
https://mtbest.net/energy_efficiency.html

( actually target 1 and 2 are easy to release : from 5,5 to 1 cent per KWh - on demand- it is more complex to organize !)

500 US$ per FE device is a high price :                         https://www.jovoto.com/projects/300house/landing
300 US$ challenge " for the first social home" in comparison
The second great search : drinkable water on demand

[Gear]

But your question is an important one. Is the autoresonating frequency the "best" frequency for the task?

You got the point. Sometimes auto frequency does not mean that coil is in resonance.
It can be worse than some other controlled frequency.
Except for Mr. Rick. For him everything is resonance.

Even switching with the hand.

He said that he diacovered mosfets only some time ago and their speed.
But probably he does not know how to implement them, so he used only gate driver.
Before that he switched with bipolar, which he saw from Bedini.
But speed is important for him.