Posted by S Andreason on
URL: https://www.es-forum.com/EMF-Blocking-tp3349069p3357615.html

Loni wrote:
> Wow, mu metal is complicated.

I would say magnetic fields are more complicated, but i think the method
to block magnetics didn't exist before some high-tech discoveries and
methods.

Those with a single axis gauss meter, (directional), may notice that
aiming the meter directly at a motor or power line, does not always get
the highest reading at that location. Rotating the meter, like a cone,
until a higher reading is found, shows the shape of the toroid, and that
it is not linear. More like it travels along a sphere (oversimplified),
so finding the right angle to block that field, is indeed complicated.

Trying to find a picture to better illustrate this...
http://www.g3ynh.info/zdocs/magnetics/diagrams/magflux.gif

In actuality what the mu metal is needing to do is CUT Across the field
lines.

Stewart