Re: Oil insulated secondaries (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Wed, 12 Sep 2007 07:28:04 -0600
From: Gomez Addams <gomezaddams@xxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Oil insulated secondaries (fwd)

A friend of mine has built a fairly successful 400-500 watt
TC with an oil-insulated secondary.  It has a single simple
spark gap and creates streamers around 12".  It could do
better if the gap were opened up, but at that point, the
secondary arcs down the side from top to bottom _around_
the oil tank (which is made of gray PVC pipe).  The
secondary is only about 24" tall.

Unfortunately, he has never written up any documentation
on it.

On Sep 9, 2007, at 10:29 AM, Tesla list 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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WWCD: What Would Cthulhu Do?