Re: barium titanate doorknob caps

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "cougercat by way of Terry Fritz <twftesla-at-uswest-dot-net>" <felix1063-at-home-dot-com>

Hello Al and group,

Un fortunately, years ago, when I could have gotten a garage full of them, I
hadn't dreamed of anyway of using them..  The transducers are used in depth
sounders.  Cheapies and US military grade.  The ones that I have seen
usually are approx 3 inches in dia., about 1 1/2 inches thick, although, I
have seen them up to 10 inches in dia and around 4 inches thick. The
frequency of the pulse hitting the transducer is usually around 85 khz thru
220 khz.  Housings around the transducer can be anything but are usually
epoxy or brass.

I've seen them sold at second hand shops for next to nothing.  More if the
indicator is included.

Keep in mind though that Barium anything (salts, oxides, nitrates etc) are
very toxic.

--jeff


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, April 13, 2001 3:18 AM
Subject: Re: barium titanate doorknob caps


> Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>"
<uncadoc-at-juno-dot-com>
>
> Hi Jeff,  These sound promising, can you give more details?  Do you have
> these for sale?   What do they cost?   Al.
>
> On Tue, 10 Apr 2001 20:36:53 -0600 "Tesla list" <tesla-at-pupman-dot-com>
> writes:
> > Original poster: "cougercat by way of Terry Fritz
> > <twftesla-at-uswest-dot-net>" <felix1063-at-home-dot-com>
> >
> > Hi folks,
> >
> > We use to use a barium titanate transducers for high powered depth
> > sounders.
> > These transducers were approx 1 inch thick with 2 silvered surfaces
> > for
> > driver connections.  Could these be converted into capacitors?
> > Anyone have
> > any ideas?
> >
> > --jeff
> > ----- Original Message -----
> > From: "Tesla list" <tesla-at-pupman-dot-com>
> > To: <tesla-at-pupman-dot-com>
> > Sent: Tuesday, April 10, 2001 7:23 AM
> > Subject: barium titanate doorknob caps
> >
> >
> > > Original poster: "will dork by way of Terry Fritz
> > <twftesla-at-uswest-dot-net>"
> > <vcdmasta-at-hotmail-dot-com>
> > >
> > >
> > > Hello everyone,
> > >
> > > i was wondering if anyone knew where i could pick up some barium
> > titanate
> > > doorknob caps (in ammounts of 50) surplus or bargain priced. Also,
> > i was
> > > wondering if you could refer me sites where i could purchase these
> > retail,
> > but
> > > perferably surplus due to my limited budget :). Thanks
> > >
> > >
> > >
> > > Will McManus
> > >
> > >
> > > ----------
> > > Get your FREE download of MSN Explorer at
> > > <http://explorer.msn-dot-com>http://explorer.msn-dot-com
> > >
> > >
> > >
> > >
> > >
> >
> >
> >
>
> ________________________________________________________________
> GET INTERNET ACCESS FROM JUNO!
> Juno offers FREE or PREMIUM Internet access for less!
> Join Juno today!  For your FREE software, visit:
> http://dl.www.juno-dot-com/get/tagj.
>
>
>
>