Kapanadze Cousin - DALLY FREE ENERGY

[magpwr]

Working on the basis of 4.8MHz natural resonant frequency for the grenade coil and a coil former diameter of 50mm, I work out that the complete winding length is in the order of 31 metres. This is only around half of the wavelength which is 62.45 metres. Any comments on this? I have taken into consideration the increased diameter of the 24 and 12 turn coils.

hi Hoppy,

Ruslan have mentioned in Russian forum that 1/2 wave length of the coil is 18.75m.

multi strand copper wire for grenade coil is 2.5mm sq .I have forgotten the exact number for wire insulation part which is around 2.9mm .Please do refer to previous posting by Jeg or Void.
Calculation to derive the pvc pipe diameter was found to be at 5.25cm~ by Jeg or Void base on receiver coil winding spec which was posted.This after factoring insulation.

Advise to refer to previous posting....

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There is only 5.5cm diameter pvc pipe available at my location.

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I have attached receiver coil spec for my personal use.The reason why there is 2 or 3 more winding at the bottom was based on past winding experience to get the upper winding foundation nicely done.
In practice eg:24,24 will never work out well for the upper coil in this case 24 top since lower foundation is weak at the sides.

For verification-Itsu have mention the same findings related to winding somewhere for the current device which he got 26.5khz once combine with 0.47uf hv capacitor.

Please ignore the Ferrite balun part as this is replaced with 2 turns for latest Ruslan device but take note the 2 outer larger coil is cw & ccw this time base on my observation.Double verification on this part is needed.

[d3x0r]

I would like to add few things:

1)The resonances are best calculated by wire length (it is same as wavelegth) and this method is also how Ruslan also used in his calculations and his "grenade" coil which was aimed for 4.8MHz resonant frequency
2) First you build "grenade" coil with 48CW+48CCW + 24CW+24CCW + 12CW+12CCW then try to find its resonance without earth ground attached as antenna and later when grounded

cw ccw, ccw cw, ccw, cw ; 48-->24 flip

3) Depending on frequencies found you will need to build Tesla coil resonating on 1/3rd frequency of main coil

I still think it's 1/3 wavelength; λ/3 .  My resonances are 1200 (both ends of coil peek at resonance) with no ground, 900, 1800 (signal resonant on non ground side with ground side a; signal resonant on ground side with ground side a) and 1073, 2300, (signal resonant on non ground side with ground side b; signal resonant on ground side with ground side b)

should I tune for signal on the ground side or the opposing side?
So... 900 or 1073 at ungrounded sides of the coil, and a resonant on the ground side at almost double that ....

Hopefully this will help in tunning...

Cheers!

[Hoppy]

hi Hoppy,

Ruslan have mentioned in Russian forum that 1/2 wave length of the coil is 18.75m.

multi strand copper wire for grenade coil is 2.5mm sq .I have forgotten the exact number for wire insulation part which is around 2.9mm .Please do refer to previous posting by Jeg or Void.
Calculation to derive the pvc pipe diameter was found to be at 5.25cm~ by Jeg or Void base on receiver coil winding spec which was posted.This after factoring insulation.

Advise to refer to previous posting....

---------------
There is only 5.5cm diameter pvc pipe available at my location.

Hi Mag,

Thanks, this makes sense, as Rusla's coil former in video: https://www.youtube.com/watch?v=dmE_yZjIBrA  is probably only 25mm - 30mm dia, so a lot less wire length. I have 4cm, so will need more turns, assuming 4.8MHz fundamental is in some way critical??. How critical is the turns ratio of the step windings?

[magpwr]

Hi Mag,

Thanks, this makes sense, as Rusla's coil former in video: https://www.youtube.com/watch?v=dmE_yZjIBrA  is probably only 25mm - 30mm dia, so a lot less wire length. I have 4cm, so will need more turns. How critical is the turns ratio of the step windings?

hi Hoppy,

The only thing i know critical is 1.7Mhz...1.8Mhz for the tesla coil resonance once all wiring is completed including the outer coil.

This advise is also for itsu.
If working with tesla coil in order to know resonance frequency of tesla coil while in operation the best practice as seen in many web sites is merely laying the probe near tesla coil(Around middle would do) around 10cm away estimate.


This is to ensure probe don't interfere with tesla coil by adding unwanted capacitance.

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Ruslan have mentioned somewhere in Russian forum it is very important to get around 37.5m for the multi layer coil else you will need to redo all over.

itsu have got it right for the receiver coil use his pvc pipe spec at 5cm if i recall correctly.

Capacitor eg:0.47uf 2kv can be tricky as the uf value varies even from the same make.Buy 4 capacitors which likely all 4 cap would have quite similar value but not exact most of the time.

[d3x0r]

hi Hoppy,

The only thing i know critical is 1.7Mhz...1.8Mhz for the tesla coil resonance once all wiring is completed including the outer coil.

can you dig up a reference for that?