Hi Dave,

I do not presently have such a plot. I've been working on a program that
would generate such a plot so that I could compare mathematics, as I
understand it, and results. The increases in measured voltage at each corner
are due to greater coupling between the embedded inductors and the output
coil.

BTW, I changed the output connections so that the two bifilar wires were in
parallel, then added a 1.8nF capacitor to make it series-resonant at 44 kHz.
This changed the observed difference between no magnets and magnets to
about twice that of the bifilar connection. I also removed the laminations
that
make a tight fit between the magnet stack and the core and the results did
not vary. Making this observation is limited by the ability to accurately
measure voltage on the screen of the oscilloscope. I expect that there should
be a small decrease because there is now a much larger reluctance in the
path of the magnetic field from the magnets which will cause a decrease in
the static field in the core. The air gap at the bottom of the magnet stack was
just over 0.10-inch.

I am building another setup to concentrate on the changes of magnetic
field at the core-interior side of the output coil and to determine what
physical
changes increase the no-magnet/magnet difference.

David J.

--- In MEG_builders@yahoogroups.com, "davedameron" <ddameron@e...> wrote:
> Hi David,
> These look like very interesting tests.
> Do you have a plot of the output of the 32 inductors around the
> core and inside the output coil, showing the measurement of the mmf
> or
> the A-field distribution, with load?
> -Dave D.
> --- In MEG_builders@yahoogroups.com, "davidj95650" <djenkins@r...>
> wrote:
> > In my message to Yahoo MEG-Builders #1207 dated 03 NOV 2003,
> > I reported the results of an experiment to measure the magnetic
> > field inside the output coil at locations on the inside and
> ...