Some Bifilar coil experiments

[evostars]

I made 3 equal  bifilar pancake coils, on 3 cd trays, as can be seen in my youtube videos
https://www.youtube.com/playlist?list=PLFz4KwTTMz5HlNimggtTsrDN9_jD2ZTeS


I placed them on top of each other, stacked like pancakes. equal distance. then I connected the center coil with a pulse driver. rim negative, center positive. this made the top side north, and bottom side south (compass measured)

The top and bottom coil where connected via the rim, and also connected to ground.

In this setup, when the top and the bottom coil are tuned (placing a capacitor parallel over the coil with the highest resonant frequency, so it dropped in frequency to match the other coil). there was a big resonant voltage rise at both of the centers, of both coils.

In trying to rectify to dc, I noticed the north side, produced much more voltage (pressure).
I then reversed the bottom coil, and placed a slight distance (4mm) between it and the center coil.
Something strange happened. The voltage rise on the south side became higher. and the resonant frequency dropped from 630KHZ to 430KHz.
After retuning the top coil(which still had the same resonant frequency) to match the frequency of the bottom coil, I noticed, the signals where out of phase.

In this new tuned setup, when I connected the the centers of the coils, to 2 uf4007 diodes, and 4 6,3uF capacitors (the picture shows parallel but i switched to series to protected the capacitors), The voltage was much higher.

11,68Vdc pulsed center coil, resulted in 950Vdc in the capacitors.

I wonder how this can be. the signals is 180 degrees out of phase (oscilloscope reading)
Why is the resonant frequency of the reversed south coil lower, and at the same time, much higher in voltage?

But the biggest smile on my face, was when I realized, the energy stored in the capacitors is related to the square of the voltage. So when the pulse voltage is made higher, the energy in the capacitors, is related to the square of the voltage rise. (much bigger).

I did a test with a 19Vdc pulse, and the capacitors read 1500Vdc

I wonder, what would happen, if I used a neon transformer, with a cap and a spark gap to produce the pulse voltage (high voltage).
The resonant rise would be insane high voltage. With enormous amounts of energy in the capacitors (series HV caps).

[MileHigh]

In reading your description I believe that you tuned everything for the maximum resonant rise on the upper and lower coils, and when you did this the coils were unloaded.  Then you added the diode and capacitor array as a load and measured the very high DC voltage across the capacitors after a few seconds.

So the critical question is did you try to charge the capacitors when the transistor pulsing was not at the resonant frequency?  From what I can see in your description and drawings, you should get nearly as high DC voltages or perhaps the same high DC voltage when pulsing the transistor below or above the resonant frequency.

Have you tried this?   If the results are as I am expecting them do be, how do you explain this?

[evostars]

In reading your description I believe that you tuned everything for the maximum resonant rise on the upper and lower coils, and when you did this the coils were unloaded.  Then you added the diode and capacitor array as a load and measured the very high DC voltage across the capacitors after a few seconds.

So the critical question is did you try to charge the capacitors when the transistor pulsing was not at the resonant frequency?  From what I can see in your description and drawings, you should get nearly as high DC voltages or perhaps the same high DC voltage when pulsing the transistor below or above the resonant frequency.

Have you tried this?   If the results are as I am expecting them do be, how do you explain this?

changing the setup changes the resonant frequency.
so i tuned with the diodes  (making 2 dc paths)  and the capacitors connected while pulsing.

only this high voltage rise at the resonant frequency (both coils same resonant rise,  but out of phase)

if its not out of phase,  and not resonant,  than it wont work (only low voltage in the caps)

[MileHigh]

changing the setup changes the resonant frequency.
so i tuned with the diodes  (making 2 dc paths)  and the capacitors connected while pulsing.

only this high voltage rise at the resonant frequency (both coils same resonant rise,  but out of phase)

if its not out of phase,  and not resonant,  than it wont work (only low voltage in the caps)

Okay, then what I was thinking is probably not happening.  Just to double check, are you sure about this?  For example, if you get say 950 VDC at 430 kHz, are you sure you don't get say above 900 volts at say 50 kHz?

Anyway, any serious discussion of your setup and measurements requires a proper and complete schematic.  That's just the way it works in electronics.

[evostars]

Okay, then what I was thinking is probably not happening.  Just to double check, are you sure about this?  For example, if you get say 950 VDC at 430 kHz, are you sure you don't get say above 900 volts at say 50 kHz?

Anyway, any serious discussion of your setup and measurements requires a proper and complete schematic.  That's just the way it works in electronics.

no 900 volts.  it is a narrow band it has to be precision tuned. i checked.

yes text isnt the best way to show it. but the pics explain enough(for now) .  maybe another video...