Important notice on Metglas AMCC cores

[Paul]

First, I need to state that to date not a single person has precisely
replicated Naudin's Metglas MEG. Only a few people have claimed to
replicated Naudin's Metglas MEG, but after repeatedly asking such
people they admit their replication was not a precise Naudin Metglas
replication.

Several weeks ago I learned from the Metglas engineer that Metglas has
not been longitudinally annealing their AMCC cores. It is very
possible that Naudin's has a longitudinally annealed AMCC core. To get
such a longitudinally annealed core now requires a custom order, which
one would probably have to sell their house to buy.

Furthermore, I found out present AMCC cores are no-field annealed.
What's very interesting is that it's very difficult to achieve a
closed gap. The Metglas engineer pressed the two cut U-shaped AMCC
cores together and taped them. Normally a no-field annealed AMCC core
has appreciable coercivity. The Metglas engineers BH-curve testing
revealed that such taped core has ***NO*** coercivity, as if it were
transversely annealed. Additionally, this destroys the materials
extraordinarily high permeability. This means it requires significant
force to achieve the materials extraordinarily properties. Even so,
such present cores are not longitudinally annealed, which according to
my simulations makes a huge difference in magnetic entropy.

Initially this sounds like bad news, but there's light at the end of
the tunnel.

Regards,
Paul Lowrance