[TheForge] microwave heavy metal session

Thu Feb 12 18:15:00 2004

I'm pretty ignorant about electronics but magnetic shielding is easy.

Father spun many parts for the early space program up to Apollo. One of the
things we did regularly was spin magnetic shielding components. The two
materials I recall are "Mu metal" and a composite called,
"netic/copper/conetic". The Mu metal was an outright shield for magnetic
fields. The "netic/copper/conetic" composite was magnetic on one side and
"anti-magnetic" on the other. It was fun stuff to play with, the conetic
side would repell either pole of a magnet but wasn't magnetic itself. The
netic side attracted either pole of a magnet but wasn't magnetic itself. It
drove my jr. high science teacher nuts. <evil grin>

I also don't see a reason to build one big unit, numerous smaller ones
should work just fine, maybe better.

Frosty
------------------------
If it ain't forged
it ain't real.
Wrought iron is.
The FrostWorks

Meadow Lakes, AK.

----- Original Message -----
From: "Grover Richardson" <[email protected]>
To: <[email protected]>
Sent: Thursday, February 12, 2004 12:14 PM
Subject: RE: [TheForge] microwave heavy metal session

Now in this matter, I stand corrected.  I had totally forgotten about
heating nitrogen<G>.  Arg!!  Still, a pupose built unit of say 100 kW would
be a honker beast with magnetic fields to cripple the soul.  I've had my
hand go numb in a field, and a co-worker had his eye shut down (went
temporarily blind) due to magnetic fields.   There's a physical limit to how
big you can build one and make it work.  I'll ask the local microwave guru
and see what he thinks is the max likely for 2.40 GHz.

Seems to me the old shorted turn transformer would be efficient and easier
to build<G>.