Re: Beryllium Oxide

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "BRIAN FOLEY" <ka1bbg@xxxxxxxxxxx>

well consult the makers of these tubes and get the inside as i did 8 years
ago. the output end of the magnetron needs cooling, so BeO is used. as for
the color, i think in todays world they can make it any color you want, but
it either is BeO or it isnt. percentage of BeO isnt a concern,  it is the
health effects of the BeO however much is present.
be careful, cul brian f.
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Sunday, December 31, 2006 7:57 PM
Subject: Re: Beryllium Oxide


> Original poster: mercurus2000 <mercurus2000@xxxxxxx>
>
> I somewhat doubt the correctness of that statement in that wikipedia
> article, all the new microwave ovens have pink insulators on the
> magnetrons I've taken apart while only the really old ones were
> white, I doubt with today's stricted enviromental regulations they
> would suddenly start putting BeO into the consume magnetrons.
> http://lists.contesting.com/_amps/2002-09/msg00403.html
> Adam
> Tesla list wrote:
>
> >Original poster: "Breneman, Chris" <brenemanc@xxxxxxxxxxxxxx>
> >
> >I think that sometimes BeO is used instead of that white ceramic
> >insulator.  From the wikipedia article on "Cavity magnetron", "Some
> >magnetrons have ceramic insulators with a bit of beryllium oxide
> >(beryllia) added-- these ceramics often appear somewhat pink or
> >purple-colored (see the photos above)."  One of the two photos above
> >is a picture of a microwave oven magnetron, with a pink
> >insulator.  I actually finished taking apart a microwave oven today,
> >and its insulator is purple-ish.
> >Chris
> >
> >
> >-----Original Message-----
> >From: Tesla list [mailto:tesla@xxxxxxxxxx]
> >Sent: Sat 12/30/2006 10:17 PM
> >To: tesla@xxxxxxxxxx
> >Subject: Re: Beryllium Oxide
> >
> >Original poster: mercurus2000 <mercurus2000@xxxxxxx>
> >
> >Wait, common in microwave ovens? I've dissassembled over 50 microwave
> >ovens and never seen anything remotely resembling a BeO insulator,
> >are you referring to the white ceramic below the output antenna?
> >Adam
> >Tesla list wrote:
> >
> > >Original poster: Mike <megavolts61@xxxxxxxxx>
> > >
> > >There IS a disposal issue, because you don't really want to poison
> > >the poor guys crushing your garbage in the truck.
> > >Jim could be right there....although I doubt they'd crush...there is
> > >still the possibility and that would just depend on how you
> > >feel.    I have worked in sevaral laboratories and one day, the
> > >janitor came up to me extremely worried....in the lab next to mine,
> > >they were sampling something with MTBE in it(gasoline oxygen
> > >additive for those who wonder).   His eyes were tearing and red  and
> > >he was near gasping for air.   It seems the person doing the
> > >analysis was pipetting sample then simply tossing the used pipets
> > >into the trash....when the janitor pulled the liner out...he
> > >inadvertantly compressed it, blowing the residual MTBE right into
> > >his face.    He was ok...and I created a stink the next day and from
> > >that point on...the used pipets were kept under a fume hood until
> > >thoroughly dried........
> > >Things can happen....I've handled a lot of those BeO
> > >insulators...they are common in microwave ovens and other similar
> > >uses.    Just have to be sensible about it all.
> > >Mike
> > >
> > >
> > >__________________________________________________
> > >Do You Yahoo!?
> > >Tired of spam? Yahoo! Mail has the best spam protection around
> > >http://mail.yahoo.com
> > >
> >
> >
> >
>
>
>
>
>
>
> --
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.1.409 / Virus Database: 268.16.1/611 - Release Date: 12/31/06
>
>