Re: [] conical secondary (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sat, 16 Jun 2007 20:56:04 -0400
From: Marko Ruban <Marko@xxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: [] conical secondary (fwd)

That looks like a lot of work.  I'd sure like to see the results when
you're done :)



Tesla list wrote:

---------- Forwarded message ----------
Date: Sat, 16 Jun 2007 15:12:25 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: [] conical secondary (fwd)

Hi Marko,

Yes, several coilers have built flat secondary's. Not a great deal of 
coilers, but a few. Most are close wound secondary's and this was also 
my first flat secondary. I used a lazy susan turn table to wind it. I 
actually laid down two sided tape on a piece of acrylic so that when I 
wound the coil (with 24 awg), the turns would stick to the tape and stay 
in place. It worked out pretty good.

I've also wound a 1/2 scale replica of Tesla's flat coil. This was very 
easy to wind, but building the supports for it was a real labor 
intensive thing.

I first cut runners to lengths then used a router bit to groove a center 
channel along the runners which would accept 1/8" thick plexiglas strips 
(the actual runners to hold the secondary winding). I mounted those on 
circular cutout plywood.
http://www.classictesla.com/flat/Img_3002fast.jpg

When I cut the plexiglas standoffs, I made the turn to turn spacing 
1/4". I taped off the wooden runners and used a clear 5 minutes epoxy to 
glue in the plexi standoffs.
http://www.classictesla.com/flat/Img_3003_fast.jpg


I built a bracket that mounted the form to a tripod. The bracket allows 
the form to pivot between horizontal and vertical. A bearing pulley 
(form a Dodge 318 Idler pulley) was mounted to the form. This allowed me 
to spin the form as I wound it.
http://www.classictesla.com/flat/IMG_3020.JPG

A closeup of this simple bracket.
http://www.classictesla.com/flat/IMG_3021.JPG


Once I wound the coil, I removed it from the tripod and set it on a 
table. Here is what the finished winding came out like.
http://www.classictesla.com/flat/Img_3462_fast.jpg

I may remove a few inner turns before I'm finished, but now I'm trying 
to figure out the best primary for this coil. I've got some copper 
ribbon I was planning on, but I may change away from that.

In the end, the coil will have a sphere mounted between 1 and 2 feet 
center to the coil. It "will be", rim grounded with the hv end center to 
the secondary.

In any case, yes, we are playing with flat coils also. Just about every 
coil type is being built by someone, somewhere.

Take care,
Bart


Tesla list wrote:

  

---------- Forwarded message ----------
Date: Sat, 16 Jun 2007 11:34:58 -0400
From: Marko Ruban <Marko@xxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: [] conical secondary (fwd)

Just out of curiousity.... has anyone ever built a pancake TC secondary
(in a home built system)?