Re: [TCML] WINDING A FLYBACK

[Tim S <stm800@xxxxxxxxxxx>]

I did a test a couple of years ago with silver anti static bag material.
2 inch round copper disks like a spark gap and placed a single sheet of anti static bag material in between,the material was slightly bigger diameter than the disks.
Then adjusted the all thread rod to sandwich the plates together tightly
and ramped up the voltage to 10 kv @ 30~45 khz with a solid state driver.
blue corona was seen in the dark but no arc through occurred.
some one else might want to try it and post more results.

Happy Holidays All.

Tim

--- On Wed, 11/23/11, Adam <teravolt.org@xxxxxxxxx> wrote:

From: Adam <teravolt.org@xxxxxxxxx>
Subject: Re: [TCML] WINDING A FLYBACK
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Date: Wednesday, November 23, 2011, 2:58 AM

I'm not so sure rubber cement would be a good insulator. I used teflon tape
because it is very plastic, and when pulled tightly it for the most part
conformed to the windings and squeezed air out.

As for rosin, use a 50 50 mix of beeswax and rosin. That's what they used
to use in the 40s for insulation, and it works well. Doesn't shrink on
cooling and it's nice and plastic.

http://imgur.com/a/OPw3U

On Tue, Nov 22, 2011 at 7:25 PM, Scott Bogard <sdbogard@xxxxxxxxx> wrote:

> Yeah I think I'm going to avoid potting it, as much as that will give a
> better product, to build a vacuum machine to do it properly, I think I'll
> try other routes.  I'm thinking the rubber cement and paper will be a good
> idea, should be voltage resistant, and I can coat the wire with fresh
> cement as I wind it, ensuring no air underneath.  Than again the idea of
> using rosin is good as well, and will be less likely to break down over
> time, and require less heat than wax, so as not to damage the teflon.  I
> think I'm going to have to try some things, if I have more questions I'll
> be sure to send them your way.
>
> Scott Bogard.
>
> On 11/22/2011 3:15 PM, Adam wrote:
>
>> Don't use parrafin. The problem I've encountered with that is its massive
>> shrinkage when it cools, which leads to cracks and air bubbles. Instead
>> use
>> beeswax, or a mixture of rosin and beeswax. It doesn't shrink nearly as
>> much.
>>
>> http://i.imgur.com/UOQ5U.jpg
>>
>> As for leading the wire thru, I just put the next layer of tape 'under'
>> the
>> wire, so it's just a continuous spiral.
>>
>> On Tue, Nov 22, 2011 at 12:37 PM, Scott Bogard<sdbogard@xxxxxxxxx>
>>  wrote:
>>
>>  Hi Adam,
>>>     That is impressive, not exactly what I was looking for but impressive
>>> nonetheless, elegant in its simplicity even.  My only concerns are thus,
>>> the presence of air between windings since it is not technically potted
>>> (which could be rectified easily by swapping out the electrical tape with
>>> some kind of paper, and then potting in paraffin or epoxy, as long as it
>>> does not get too hot to melt the Teflon) and how long it took to build
>>> (25
>>> hours, ugh...)  I am planning on making a number of flybacks, so I will
>>> have to find a way to expedite the process, even if it is just mounting
>>> it
>>> on a rotating rod.  You have given me much to think about, thanks very
>>> much
>>> for sharing, I'm thinking maybe I will do this with paper coated in
>>> rubber
>>> cement (which shouldn't melt Teflon, and provide decent dielectric
>>> shielding) I'll probably have to make one layer at a time, since it won't
>>> stick to itself, but should make a fairly rigid finished product,  How do
>>> you do the lead through from one layer to another?  Just leave the wire
>>> sticking out until you put down your tape then bring it over?
>>>
>>> Scott Bogard.
>>>
>>> On Mon, Nov 21, 2011 at 6:31 PM, Adam<teravolt.org@xxxxxxxxx>  wrote:
>>>
>>>  Not sure if I'm doing this right....
>>>>
>>>> But this might help you somewhat http://teravolt.org/fryback.**php<http://teravolt.org/fryback.php>.
>>>> It's
>>>>
>>> my
>>>
>>>> results at making an FBT.
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