Re: Toroid size on Big Coils

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "David Rieben" <drieben@xxxxxxxxxxxxxxx>

Dmitry,

I can't really comment on epoxy as I have never used
anything but polyurethane on my secondary coatings.
IMHO though, I don't think even the thickest of coat-
ings can properly protect the secondary surface from direct hits, 
especially with big coils. I would think com-
plete oil submersion under several atmospheres of pres-
sure or SF6 would be about the only thing that could
effectively protect the secondary coil surface from di-
rect streamer hits, but that's just my opinion ;^)

David Rieben

----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Wednesday, February 15, 2006 12:53 PM
Subject: Re: Toroid size on Big Coils


> Original poster: "Dmitry (father dest)" <dest@xxxxxxxxxxx>
> Hallo David and all other experienced coilers,
> Friday, February 10, 2006, 10:35:56 AM, you wrote:
> > Original poster: "David Rieben" <drieben@xxxxxxxxxxxxxxx>
> > I ended up with secondary damage that looked much like the
> > damage to Dr. R's M-200 secondary coil:
> > http://users.cableaz.com/~chooper/images/tes133.jpg
> i have not enough data and still hesitate in choosing coatings for
> secondary - poly or epoxy?
> tell me guys - can epoxy prevent or at least attenuate such damage, or
> all that it can is just make things even worse, especially repairing of
> blasted area, coz you can`t scrape it away so easily as poly?
> -----
> Let the bass kick! =:-D