Nathan Stubblefield Earth battery/Self Generating Induction Coil Replications

[IotaYodi]

I notice the MV builds up, then sometimes it reverses polarity.

Have any fluorescent lights? That would do it. Natural electrostatics in the air can build Mv but not as quick as a fluorescent ballast. The polarity may have changed if you moved the coil in a different orientation to the Earths magnetic field or an external field like house wiring or something magnetic.

I am looking for a ferrite core for my next NS coil

Do you know how big a difference there would be in the intensity of the magnetic field between the two? I see there is both hard and soft ferrite materials. Dont know enough about electronics as to which one to use. I would assume soft but I see different types made for different frequency's. This core may work better just because of the frequency's. The timing of the total field collapse may be able to be "tuned" to a faster rate using ferrite instead of iron. Without the proper "on" "off" timing of the Earths dc currents the coil would be just a doorstop as Jeanna described it. If you could reverse the polarity every cycle on the core then that would stop the permanent or remanence magnetization on the core which hinders the collapse. Maybe thats what the Trigger coil was for.       

[jeanna]

Theres 10 Layers of windings, consisting of 76 bifilar turns per layer.
So I gues there is 760 turns in total.
I didn't use any cotton covered copper wire.

Copper wire is just enameled copper wire, BUT I also used a plastic covered iron wire.
....

Below is my pride and joy lol.

Nice, jim.

I have one like that which I call my non galvanic one. I think like all of mine that the core is not soft iron so it is not too good, and I am missing the subtle stuff.

So, this particular coil of mine is the one that worked like a charm as the torroid replacement in a joule thief circuit.

Jim,
Here is an idea I have wanted to try for a while, and you are in a position to do this now, so I will share the idea.

Remove the insulation from just the top layer of the copper wire and cover just that copper wire with cotton and re-wind. When it gets wet, there should be the required amount of galvanic current to start up your coil "internally" and you should have a winner like lasersaber.

I better get myself to the welding shop for some mild iron or steel.

that is a nice looking coil.

jeanna

[jeanna]

I actually have some good/old news.

Inspired by Jim and IotaYodi's recent posts, I found my old rusted stake in the shed and furthermore, I pulled out a NS coil from the N end of my N-S setup. This has the same kind of iron stake.

Way way back, I noticed some peculiar compass reading with this coil which may have been the second one I ever made. It showed compass directions similar to those Lasersaber showed in his early video.

I brought both of these inside to warm up and dry out, but first in the cold wet state, I checked them for overt magnetism in the way I checked the steel bolts which are permanent magnets.

These iron stakes show no overt magnetism. (!)
Maybe they will react too slowly, but they seem good for now.

so, I could make a coil with this nice new cotton covered copper wire and annealed iron wire.

AND, I will make a sleeve of some kind that should allow me to remove and replace this stake if I want to.

jeanna

[Cap-Z-ro]

A though occurred, so I thought I'd pass it on in case it matters.

Could it be that the length of time the iron takes to lose its magnetism is related to voltage-ampherage ?

Regards...

[jeanna]

A though occurred, so I thought I'd pass it on in case it matters.

Could it be that the length of time the iron takes to lose its magnetism is related to voltage-amperage ?

Regards...

Yes, Cap
That is why I am not starting another one until I get the right core material.
The fancy word is hysteresis and it is all important.

thanks for the thought,

jeanna