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Re: [TCML] WINDING A FLYBACK

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. It's

my

results at making an FBT.
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