Confirmation of OU devices and claims

[seaad]

Coils at all angles.

==> ITSU, (all)
Some thoughts on a small test regarding coils in all directions:
I assume that Rick said.
A coil can be a receiver and a transmitter at the same time.
In my simple ugly picture below, I give an example of this.
Normally, coil A can't transmit energy to coils C, D with these mutual coil directions.
First test that with coils A + C + D so that the LEDs on C, D do not lit.

The ellipses roughly show the energy propagation.
But coil A can transmit energy to coil B. (red ellipse)
Thereafter, coil B repeats energy (blue ellipse) to coil C which transmits energy to coil D (purple ellipse).
This can of course be completely up in the "blue" 

- Maybe the test has to be redone with other angles between the coils to work?
- Maybe a re-transmitting of the energy from coil B may only occur with a certain kind of load? (LED resistor, ETC)

Regards Arne

[gyulasun]

Hi Itsu,

I agree with Nick's advice on spacing the RX coils all the way around the TX coil.

You mention overcoupled coils for sympathetic resonance: well maybe it would be better to find a radius around the TX coil which already insures a distance to have critical coupling or only very little overcoupling.

This could bring a benefit: you would need to fine tune less frequency difference with ferrite cores (split frequencies could get closer to each other hence also closer to a single resonant frequency) versus the case with overcoupling.
Ideally, very likely critical coupling would be the best between the TX and any RX coil and also  between any adjacent RX coil, I think.

It is possible the 10 coils will not fit into a single circle around the TX coil, you could place one RX coil under and one coil above the TX coil, this may solve or eases that problem.

With the quasi equal spacing around and say with trying to observe critical coupling,  the detuning effect for the RX coils may come about also more uniformly i.e. the mutual pulling may go towards a single direction, expectedly downwards. Then this can be compensated by retuning the TX oscillator and TX capacitor to a slightly lower frequency, to look for higher and higher brightness for more and more LED lamps.  For this though, you would need at least 10 identical LED bulbs but anyway frequent tuning the TX frequency little by little in downward direction can ease tuning process.

Just noticed Seaad's post above: yes it makes sense but an ardous task for sure. But Rick wrote it would have needed several hours at a meeting to achieve sympathetic resonance, and there was no time for it.

Gyula

[gyulasun]

Hi Nick,
The die is (or may be) cast...   

Gyula

Guys:
   Perhaps, it would help to space the coils evenly all the way around the main coil. As in winding turns on a torroid coil, which helps to fill the whole circumference. On small coils in the MHz range I've used pencils to help help tune the coils with. But, itsu's coil are much wider, so pencils may not work as well.
   Gyula:  If you don't watch out, you'll be in the ranks of a troll, like AG, and me.
   Itsu:     I think that I get the same stomach problems...                                                                                   
NickZ

[itsu]

Seaad,   Gyula,


Thanks for the info,   lots to think about and harder to do :-)


I just wanted to show where the max. RF is on the big coil by using a little RF probe, see video and diagram.
Its on top of the coil inbetween the coil and the var. cap (unless i turn around the coil).


The magnetic field though is somewhat harder to pinpoint, as a satellite coil will show different values
depending how its positioned to the big coil, see video, so the drawing of Seaad above might not be thru.

Anyway, i tried that proposed setup and got some result, but not where Seaad drew it, see video.

Video here:  https://www.youtube.com/watch?v=rjiNoeyBLd0


More in the next days......


Itsu

[a.king21]

Seaad,   Gyula,


Thanks for the info,   lots to think about and harder to do :-)


I just wanted to show where the max. RF is on the big coil by using a little RF probe, see video and diagram.
Its on top of the coil inbetween the coil and the var. cap (unless i turn around the coil).


The magnetic field though is somewhat harder to pinpoint, as a satellite coil will show different values
depending how its positioned to the big coil, see video, so the drawing of Seaad above might not be thru.

Anyway, i tried that proposed setup and got some result, but not where Seaad drew it, see video.

Video here:  https://www.youtube.com/watch?v=rjiNoeyBLd0


More in the next days......


Itsu

Nice vid.  You have just rediscovered the relay resonator......https://www.mdpi.com/1424-8220/19/9/1963
(It was invented by one of Rick's students. I believe (Almost sure - but not 100%))
Anyhow as you and G love equations - it may enhance your understanding..


And it's starting to look more and more like a  Gabriel  Kron network system.


A quotation from the paper,"The relay resonator restricts the dissipation of the magnetic flux and generates an enhanced amount of magnetic flux from the Tx to the Rx. It consists of a rectangular loop antenna connected to a capacitor that allows the relay resonator to resonate at a fixed resonating frequency"


Quote,"Generates an enhanced amount of magnetic flux" -  Now where have we heard that before......... I wonder......