Magnetic OU principle, You should really take a look at this !

[Butch]

This is the first of five test videos done by Mark years ago. I want you all to watch it and please tell me what think you see going on in the test, the results that is.
Here is the link > http://www.fdp.nu/shared/files/ButchLaFonte/Perpendicular%20Magnetics/Test1.mov
Thanks Guys,
Butch

[4Tesla]

Very hard to see the needle on the meter.  Did see it move near the end.

Jason

[Butch]

Very hard to see the needle on the meter.  Did see it move near the end.

Jason

Jason,
Mark is showing with his hand the direction the needle is moving. It's the direction that is important. What do you make of the direction of the needle movements in relation to what he is doing with the bars?
Butch

[derricka]

Re: my earlier post on ferrite bead separation.
I have now measured the force that it takes to close the gap, at 28 grams.  (still in finger pressure range, but more than I expected!)
I did this by placing a 54mm plastic separator tube (1gram) on top of the beads (to keep additional mass out of magnetic influence)
I then added 27 grams of additional beads and washers on top of the separator tube.  which left a gap of less than 1mm between the four beads.
Each bead in the photo weighs 1.3 grams. (10 beads measured together at 13 grams)

From what I can tell, separated beads or elements do take a bit more work to pull from the magnet, then unseparated elements. so this is not a total free lunch situation.

[gyulasun]

Jason,
Mark is showing with his hand the direction the needle is moving. It's the direction that is important. What do you make of the direction of the needle movements in relation to what he is doing with the bars?
Butch

Hi Butch,

When Mark pushes in the bars the needle goes to the left: means the current becomes a bit less. And when he pulls them out, the needle goes a little to the right: means some current increase. Also when the bars separate the needle goes to the left: current decrease.

Is this what you mean?

rgds,  Gyula