Re: Oil insulated secondaries (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Mon, 10 Sep 2007 01:38:16 +0800
From: Peter Terren <pterren@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Oil insulated secondaries (fwd)

I see a problem.  The aluminum end cap near the toroid has very low coupling 
and is not a problem. The cap at the other end will be right on your primary 
and will absorb most of your power.  Also you can't suspend a coil on a 
copper tube, particularly if the copper tube is near the primary for the 
same reason but I am not quite sure what you planned.
I am planning an oil insulated secondary for my polypancake coil
http://tesladownunder.com/Tesla_coils_intro.htm#Multilayer%20Tesla%20coil

Peter

>
> ---------- 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
>>
>>
>>
>>
>
>
>