Re: [TCML] Winding the primary

[Mddeming@xxxxxxx]

Hi Steve,
 
I know several people who have tried the closed method. I know of no  one who 
has tried to do it twice.
 
Matt D.
 
 
In a message dated 7/9/2008 8:08:13 A.M. Eastern Daylight Time,  
shobley@xxxxxxxxxx writes:

Thanks,  these are closed standoffs - that is they have holes drilled through 
them and  so are not open along the top edge. It is 0.25" copper tubing.

I'll  have another go starting from the middle.

Steve


Stephen  Hobley Photography
www.stephenhobley.com
317 201 4281

The Laser  Harp Project -  www.stephenhobley.com/build

________________________________

From:  tesla-bounces@xxxxxxxxxx on behalf of Quarkster
Sent: Wed 7/9/2008 12:30  AM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Winding the  primary



Steve -

What is your primary  conductor? If you're using copper tubing, here are a 
few tips:

1. Use virgin refrigeration tubing, and leave it in the coiled  shape that it 
comes in. Don't try to re-use "salvaged" tubing if you want a  nice looking 
primary. Copper tubing "work-hardens" and stiffens very rapidly  as you deform 
it, so deform it as little as possible.

2.  DO NOT try to straighten the tubing, then re-form it into a spiral. The 
tubing  will work-harden, then is likely to kink and become unmanagable.

3. Have an assistant hold the coil of tubing about a foot above  your primary 
forms, and just let one coil drop down at a time. The typical  diameter of a 
coil of rerfigeration tubing is around 18", so I start at the  end of the 
primary that is closest in diameter to the diameter of the coil of  tubing. For a 
small diameter primary this means starting at the OUTSIDE of the  primary form 
and wind inward. For a large diameter primary, this means  starting at the 
INSIDE of the primary form and winding outward. This way the  tubing requires 
minimum deformation initially, and then must be gradually  formed into a larger 
or smaller radius as you move outward or  inward.

Regards,
Herr Zappp


"Stephen  J. Hobley" <shobley@xxxxxxxxxx> wrote:
We just realized that  we can't get the primary wound into the standoffs 
without some major  kinking.

Is there a trick to winding the copper tubing into the  standoffs with the 
minimum of distortion?
It's proving to be harder than we  first  thought.

Steve

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