Hi everybody

I’d like to offer some speculations on Stubblefields bifilar coil.

I see the Stubblefield coil as a oscillator. I believe that the galvanic battery that it forms, is what kickstarts the oscillator into operation.

Consider 2 Tesla pancake coils that are placed on top of each other. They would surely interfere with each others operation. This could be overcome by placing insulation between the pancake coils.

I would speculate that the insulation between the layers in the stubblefield coil be at least the same thickness of the wire that you are using. The 2 wires that are being used must be up tight against each other, but the layers must be further apart so that the magnetic fields of the one layer do not interfere with the next layer.

Just a thought
Regards

Sarah:

Welcome.  Those are some good thoughts.  I agree.

Bill

Sorry to move this post from the data logging thread but I guess no one is looking there.
You will all have to step into the "way back" machine to remember this post from last November.

Quote from: electricme
on November 30, 2009, 07:53:05 PM]
==============================================================
OK ALL,
Yesterday I posted I would do a experiment, the idea is to show which electrodes interact the best picking up earth currents, and the results are surprising.
I used a COPPER as the North and positave electrode.
Aluminium, Copper, Steel and Magnesium coated rod.

Copper Positave and Aluminium produced the best results
                                        AT REST   MOVEMENT   ANALOG
POSITIVE        TEST METAL   V DMM     V DMM         OBSERVATIONS
------------------------------------------------------------------------------------------
COPPER           MAGNESIUM = 36.0mv     71.0mv        needle slight movement

COPPER           STEEL         = -2.9mv     40.0mv        needle not moveing

COPPER           COPPER       = -20mv      -10mv          needle not moveing

COPPER           ALUMININUM = 80mv       198mv          needle swinging wildly back and forth
                                                                         
------------------------------------------------------------------------------------------

Results =
1st Copper as Positave, Alumininun as Negative  produces best results
2nd Copper as Positave, Mag as negative
coper and coper, copper and steel  = zilch
My test photo below showing the setup

Tiny Videos following below this post
jim
===============================================================


Question:
Were all the pieces of metal used in this experiment the same size?
I'm referring to surface area and not just length.

I've never seen where copper and aluminum produced the best effect.
So if one of the pieces of metal was larger (more surface area) than the other, then that might be an important fact that we could try to exploit.

DonL

Quotebut the layers must be further apart so that the magnetic fields of the one layer do not interfere with the next layer.

With the overall magnetic intensity of the coil it would take a lot more spacing than that using cotton. The adjacent iron wire would also have a higher magnetic field than the current carrying copper wire. You would need a cotton cord in between the copper and iron wires also if you were trying to do that. The cotton cord may not be a bad experimental idea in between the iron and copper. Might give more charge area.

Hi everybody

To show that its possibly the bifilar arrangement that makes the Stubblefield coil special,
and not so much the galvanic battery, consider this article from the JL Naudin website

http://home.comcast.net/~onichelson/VOLTGN.pdf

Kind regards