[TheForge] microwave heavy metal session

Fri Feb 13 08:19:00 2004

Right.  After the numbing experience, I immediately laid several sheets =
of
mu-metal between me and the offending source, and all was well.  I just
didn't know that there was a problem, until I moved near to the =
source<G>.

Ahh.  I didn't know how it worked, just that it did, and well<G>.  Evil
grin<G>.

Numerous smaller ones, working autonomously would work well.  Again,
synchronizing or chaining them together is a nightmare<G>.

-----Original Message-----
From: [email protected] =
[mailto:[email protected]]
On Behalf Of Jerry Frost
Sent: Thursday, February 12, 2004 4:29 PM
To: [email protected]
Subject: Re: [TheForge] microwave heavy metal session

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>.

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