Re: [TCML] High voltage glue and ferrite cores

[Jim Lux <jimlux@xxxxxxxxxxxxx>]

On 11/29/11 7:40 AM, Scott Bogard wrote:
> Hi All,
>       Looking for suggestions for a glue that will be high voltage hearty,
> trying to steer away from epoxies, or anything else that must be mixed, or
> melted (tar, wax etc.)

In thin layers, everything is about the same dielectric strength. 
Shellac was used in days gone by, and is still used.  Various thin 
polyurethane coatings are probably what I'd use today: easy cleanup, no 
mixing, a bit flexible after curing/drying so it doesn't crack.


There's a big difference between thin layers and potting, by the way. 
If you are worried about corona, then potting is probably what you're 
really looking for.



 This will be for securing the paper layers of my
> flyback transformer together, I was leaning towards eithor rubber cement or
> even plain elmers glue, but do not know if they will hold up ot HV or even
> small amounts of corona, so looking for suggestions.  It must be cheap, and
> easy, and a relatively fast dry time would be nice, I'd rather not take 40
> days to put together a flyback secondary...  Also I found a potential
> source for ferrite cores, has anybody had dealings with this company?
> http://tscinternational.net/tscstoreUcore.html
> I'm going to try and order tomorrow night and will share my experience if
> anybody is interested, their data sheet says their large U cores are good
> to almost 300 watts...
>
> Scott Bogard
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