[TCML] Preparing acrylic coil form

[bunnykiller]

Hey Matthew....

Acrylic (Lexan, polycarbonate plastics) are/is an awesome choice for a 
secondary form. Some things you may want to consider when using it is to 
make sure you clean the winding area with some type of cleaner like 
Windex to remove any source of sweat, salt residuse while handling it. I 
personally dont agree with the application of solvents, sanding or using 
harsh chemicals on the tube. I have found that applying a thin coat of ( 
comes in many names) "Tool Coat"( Tool Grip comes to mind) its clear and 
has a rubbery finish when dry, but I have used it in a manner as when I 
am winding the wire on the tube to spray a light coat as the wire goes 
on to the tube it helps bond the wire to the tube and "seems" to add ito 
the insulative properties of the winding. Once the winding is completed, 
I apply another final layer of the spray to the secondary to complete 
the process. It makes for a resiliant "flexible" coat and is more 
resistant to cracking than Behr 50 ( if you can find it, its good stuff 
but becomes very brittle a few years later)...

cleaning with a solvent, sanding and drying falls under the prep for PVC 
piping...

in retrospect...  clean it, spray it lightly, apply wire, recoat it....  
but take your time :)

Scot D


Mark Lock wrote:

>Hi all.
>I've been slowly building my first TC for a while now and I've recently
>acquired my coil form, a nice piece of acrylic. My question is what do I
>need to do to prepare it for winding? I've read that it should be cleaned
>with a solvent, sanded, dried and varnished among others, but is that all
>necessary?
>My transformer is 12KV 30mA if that's any indication of how much insulation
>is required.
>
>Thanks for your help, this mailing is awesome.
>Matthew.
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