Re: Oil insulated secondaries (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sun, 9 Sep 2007 18:22:33 -0700 (PDT)
From: Yurtle Turtle <yurtle_t@xxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Oil insulated secondaries (fwd)

I'm just curious why oil would be better than simply
potting it in epoxy. I realize it would look cooler.
Seems like an oil tight seal would be harder to
accomplish than one that only needs to hold up until
the epoxy hardens.

Adam

--- Tesla list <tesla@xxxxxxxxxx> wrote:

> 
> ---------- Forwarded message ----------
> Date: Sat, 8 Sep 2007 16:22:58 -0700 (PDT)
> From: J. Aaron Holmes <jaholmes@xxxxxxxxxxxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: Oil insulated secondaries (fwd)
> 
> Hey there, Dave!  I'd be interested in any tips
> here,
> too, however I suspect the number of amateur coilers
> who have built oil-insulated secondaries can be
> counted on one hand, maybe less ;-)  The only
> functioning amateur oil-insulated coil I've ever
> seen
> pictures of is Terry Blake's:
>
http://www.tb3.com/tesla/teslathon2003/tb_tc/tb_tc.htm
> 
> It was his coil that inspired me to start building
> my
> own oil-insulated coil.
> 
> I've also heard of a few oil-insulated research
> coils,
> and seen drawings illustrating their construction.
> 
> For about the last year, I've been slowly gathering
> the pieces for a medium-sized oil-filled secondary. 
> For lack of any real guidance on oil-insulated
> construction, I've decided to strike out in what
> seems
> like a new direction:  I'm building the secondary
> inside an oil-tight ceramic insulator that used to
> house a 115kV capacitor:
> http://silicon-arcana.com/cap/cap.jpg
> (on left)
> 
> It's about 4' tall and will accomodate a 6" x 30"
> coil
> form quite nicely.
> 
> The insulator has aluminum end caps with rubber
> seals.
>  If the end caps were steel, I'd worry about losses,
> but aluminum should be fine.  The bottom of the coil
> form will be stood off from the bottom cap, too.
> 
> The secondary winding itself will also be something
> unusual; a friend with a lathe has cut threads into
> a
> piece of clear acrylic tubing, such that the
> secondary
> windings will actually lie in a groove, held very
> slightly apart so that the oil almost completely
> surrounds them.  I will not be coating the winding
> at
> all; the threaded form will keep the windings in
> place.  Within the ceramic insulator, the coil form
> will be suspended from both ends by 2" OD copper
> tubing.  I'll also be installing a pressure release
> valve on the top cap.  The top cap will then be
> completely hidden inside a 6"x24" spun toroid which
> I've cut most of the center out of.  A larger 8"x30"
> toroid will comprise the main topload above this.
> 
> All this, it is hoped, will look extremely cool when
> finished, not to mention being almost
> indestructible. 
> The biggest missing piece right now is the time to
> actually finish it!  But as I have so little time in
> general, I'm being patient about collecting all the
> best stuff.  I can't bank on any second chances! 
> We'll see what happens.  I'm hoping to actually have
> something working by mid 2008.
> 
> Cheers,
> Aaron, N7OE
> 
> 
> --- Tesla list <tesla@xxxxxxxxxx> wrote:
> 
> > 
> > ---------- Forwarded message ----------
> > Date: Sat, 08 Sep 2007 02:08:24 +0000
> > From: Sparktron01@xxxxxxxxxxx
> > To: Tesla List <Tesla@xxxxxxxxxx>
> > Subject: Oil insulated secondaries
> > 
> > Folks
> > 
> > Are there some links to construction techniques to
> > build a oil insulated Tesla Coil or
> > Magnifier secondary (or extra coil)?  Please
> advise.
> >  Thanks
> > 
> > Regards
> > Dave Sharpe, TCBOR/HEAS
> > Chesterfield, VA. USA
> > 
> > 
> > 
> > 
> 
> 
> 
> 



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