Kapanadze and other FE discussion

[stivep]

I got into the hands of an interesting, incomprehensible device. What could it be?
about 10-15 turns of copper tape into a ring. And several turns of the same tape are orthogonal.
Around the circumference of the ring. There is a fluoroplastic film between the layers of copper tape.

Yes ...
As I said before  in my post...

I  just found that :
the original picture file is : exactly form year 1999.
I'm proud of myself:___________________
original file :
w3.org/1999/

Wesley

[kolbacict]

are they attached to the side  of the foil wind?

Yes, almost all contacts are made from tape that is wound around the circumference of the ring.
11 contacts in total. Very close, after a quarter of a turn.

the hole  inside is to small for the core of a transformer.

There was probably a fixing screw.

what was it part of ?

The fact of the matter is that I don't know.
In one of the pictures, this product was not yet broken.

[stivep]

There was probably a fixing screw.

that  sentence  helps a lot.
Wesley

[stivep]

Method of measurement of
A vector network analyzer (Agilent 4395A) is used to find the resonant frequency
and measure transmission behavior between Tx and Rx.
The measured intrinsic decay rate, connected lumped capacitance,
and resonant frequency of the resonant coils
https://www.researchgate.net/publication/224235581_Efficiency_Analysis_of_Magnetic_Resonance_Wireless_Power_Transfer_With_Intermediate_Resonant_Coil/download

indicted at schematic HP4505A VNA was manufactured  in  2000. or maybe some time before that.. I'm not sure
Agilent 4395A 10 Hz to 500 MHz Agilent
but all of that can be done  with HP 4194A too.

but if you don't have it than it can be done with  simple  function generator and  .. small coil  connected to  LED
Wesley

[kolbacict]

A vector network analyzer (Agilent 4395A) is used to find the resonant frequency

You're kidding ...
This is not a land of endless possibilities.
Well, at least there is such a thing. Others do not have that.
But none of this is clear. There is a resonance at 6 MHz.
The input and output of the frequency response meter is 50 ohms.
Maybe this is the influence (resonance phenomena) of the cable.