"Quantum Receiver".

[skywatcher]

This coil has SRF of exactly 4.52 MHz which is 1/3 of 13.56 MHz.
Coil length = 73mm, core diameter = 16mm,  0.4mm magnet wire

It has similar dimensions to the DrStiffler/Lidmotor coils.

But when i connect it to the generator (13.54 MHz) the LED of the AV plug does not even light up if i connect it directly to the end of the coil.

[skywatcher]

From this picture we can estimate the size of the LM coil.
The spacing between the breadboard contacts is 2.54 mm.
This gives us a coil length of approx. 52 mm, and a coil diameter of 17 mm which is identical to my coil.
The wire size might also be similar.

So maybe the LM coil resonates at 1/2 of 13.56 MHz = 6.78 MHz ?

[synchro1]

@skywatcher,

Sounds like you may be measuring  the "Half Wave".
 
"Since the coil isn't grounded in this model, the first resonance is half-wave resonance".

This is only a radio coil calculator. (Click on the"X" to clear the advertisement).

https://coil32.net/theory/self-resonance-frequency.html

"If the coil operates at frequencies close to SRF, as for example in a helical resonator or Tesla coils, RLC-model gives incorrect results",

[synchro1]

@skywatcher,

  Quote from you:

"at 40mm length it was 9.48 MHz... Now i'm at 12mm length (almost nothing left   ) and it's at 11.04 MHz".

Assuming you were mistakenly measuring the Half Wave, you would have been at 18.96 Mhz and should have increased the windings to lengthen the coil to lower the frequency to 13.56; Instead you released the windings to shorten it which indicates you may have decided on the wrong direction.

[skywatcher]

I changed one of my coils to get a SRF of 13.56 MHz / 2 = 6.78 MHz. But also this coil didn't do anything unusual.
No LED lighting whatsoever, not even if i touch the open end of the coil.

I will stop my experiments at this point because i didn't see anything unusual until now, maybe there is something but without any concrete infos how to do it (from people who have actually done it) i don't want to waste lots of time with endless experiments, without even having a clear direction where to go. I asked Lidmotor to come here and explain his experiments, but i didn't get an answer. His last activity here was more than 1 year ago so maybe he isn't active on this forum any more. I also wonder why he didn't post any updates on this topic on youtube. Maybe he discovered that all the effects he saw could be explained otherwise. I know from my own experiences that high-frequency stuff sometimes can be tricky, and it's very easy to fool yourself.