Re: [TCML] Flat Spiral Primary

[Matt Bingham <mjdecb@xxxxxxxxx>]

Hi Tim,

Why remove the filler at all in this application?

Cheers, Matt

On Tue, Mar 23, 2010 at 11:53 PM, Thomas Schmit <Thomas.Schmit@xxxxxxx> wrote:
> You can also make the supports quickly with a milling machine or (dare I suggest it?) an x-y table on a drill press, so long as you're not looking for a great deal of accuracy.
>
> BTW - an old tube forming trick used by model steam enthusiasts and machinists is to fill the tube with water, wax or a low temperature solder. After bending, the tubing is placed in boiling water to remove the filler. The water can be frozen in place if making tight bends/etc. Remember that water contracts and liquefies under pressure, so the ice trick really does work. Probably not of much use for a primary coil because you wouldn't finish bending it before all the ice melted! Sand was also suggested, but I prefer salt. If you can blow the salt out, all you need to do is soak it in water for a short time and the salt will dissolve. Make sure you clean it well afterwards to prevent electrolytic corrosion if you have it in contact with dissimilar metals.
>
> Tom Schmit
>
> ________________________________
>
> From: tesla-bounces@xxxxxxxxxx on behalf of Sfxneon@xxxxxxx
> Sent: Tue 3/23/2010 5:59 AM
> To: tesla@xxxxxxxxxx
> Subject: Re: [TCML] Flat Spiral Primary
>
>
>
> Ken,
>
> You could also use neon tube supports to hold the tubing in place. I used
> 12mm acrylic snap-in tube supports like these shown here:
>
> _http://photos.imageevent.com/thepacratz/teslacoil/8inchcoil/websize/DSC0404
> 0.jpg_
> (http://photos.imageevent.com/thepacratz/teslacoil/8inchcoil/websize/DSC04040.jpg)
>
> This size fits 1/2" OD copper tubing very nicely, and can be mounted with a
>  screw or cemented to an acrylic base like I did. These are made by the EGL
>  company and are called "Clip-Its" and also come in 9mm, 10mm, and 15mm
> sizes.
>
> Also available are glass tube supports, 2" and 3 1/2" tall, with a  metal
> base that could be used, with or without the base. A tie-wire is used to
> hold the tube(ing) in place, instead of snapping into place. Cheaper, but more
> labor involved and not quite as nice looking. Tube supports also make
> pretty  good HV wiring standoffs to keep your primary wiring neat and tidy. Check
>  with a sign shop that installs neon, and see what kinds of tube  supports
> and silicone high voltage wire they have, or can order.
>
> Tony Greer
> Special Effects Neon
> Lubbock, Texas
> ____________________________________________________________________
>
> In a message dated 3/21/2010 5:17:37 P.M. Central Daylight Time,
> kkociolek8577@xxxxxxxxxx writes:
> Hello,
>
> Been working on my TC for a  few months now. I made primary supports for the
> ¼" copper tubing out of  strips of 1" x ½" wood. Drilled 3/8" holes and
> glued
> the supports down to a  wood base in a symmetrical manner. Now I have to
> "thread" the tubing into  this circular support. Is this going to be a
> headache? Will the tubing get  stuck after a few turns in? Was there a
> better
> way to do this? I appreciate  to hear comments from anyone who has been down
> this road before.  Thanks.
>
>
>
> Ken
>
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