Re: Oil insulated secondaries (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Mon, 10 Sep 2007 21:21:20 -0400
From: mercurus2000 <mercurus2000@xxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Oil insulated secondaries (fwd)


Do you have any pics of the coil in operation?
Adam
Tesla list wrote:
> ---------- Forwarded message ----------
> Date: Mon, 10 Sep 2007 09:06:40 +0100
> From: Colin Dancer <colind@xxxxxxxxxxxxxx>
> To: 'Tesla list' <tesla@xxxxxxxxxx>
> Subject: RE: Oil insulated secondaries (fwd)
>
> Hi Dave,
>
> I don't know if this is what you have in mind, but I've made a bipolar
> maggie with oil insulated driver (primary+secondary) to allow very tight
> coupling without flashover or corona.  
>
> I found two sections of PE gas pipe that would fit inside each other with
> just enough room for the secondary to be wound on the inner pipe.  Wound the
> secondary on the inner pipe, the copper strap primary on the outer.  Turned
> and tapped an insulating tufnol rod to sit in the middle of the inner pipe,
> running most of the length of the secondary, with brass studs at either ends
> to allow the ends of the secondary to be connected to the outside world.  I
> then added two square tufnol plates, one at each end of the pipes, with the
> studs going through the middle of each plate.  I added turned insulators on
> the outer end of each stud to increase flashover distance and finally sealed
> polycarbonate sheets round the four sides of the end plates to make a tank
> to hold the oil.
>
> Works a treat and the use of oil means I've got a very compact, tough,
> 10KVA+ driver which will sit inside an 18" cube.
>
> The main hints I'd offer are: 
>
> a) oil is very, very good at finding small gaps, and one wetted with oil,
> most materials are hard to glue.  Spend time up front making sure the unit
> is leakproof 
>
> b) think carefully about positioning of "air holes" in the inner pipes to
> allow air out (and oil in) when you fill the units up.
>
> Let me know if you want more details.
>
> Colin.
>
> -----Original Message-----
> From: Tesla list [mailto:tesla@xxxxxxxxxx] 
> Sent: 08 September 2007 21:16
> To: tesla@xxxxxxxxxx
> Subject: Oil insulated secondaries (fwd)
>
>
> ---------- 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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