Re: Rewinding NST`s

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Nebojsa Kovacevic by way of Terry Fritz <twftesla-at-qwest-dot-net>" <morfeus-at-EUnet.yu>

HI All!

Well thanks! In here, it is a bit diferent story. Everyone who would start
building a Tesla
coil would first have to deal with a seriously lack of parts. That means
almost everything
needed for TC. Wire especially. So, I am forced to learn to make everything
myself. It turned
out that my transformers work great, and I personaly think that they can
work without any
insulation, and this is how people should deal with this problem. After a
short time of
testing them again, I was under the impression that they are unabble to die
ever again. And
you really don`t want to know what I did with them to determine that. Tesla
coil is almost no
resistance for it now.

Regards,
Nele

Tesla list wrote:

> Original poster: "Brian by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<ka1bbg-at-webryders-dot-net>
>
> WoW, nice work! rewinding fine wire is a hard job and takes great patience!
> Many people suffer the neon death from used transformers...my brother's coil
> is using Obit for his and they dont last too long-the reason they were
> replaced because erratic or old or tar or sealant is cracked allowing
> failure. But he gets them for nothing and when it dies he sends it back to
> the junkman(who doesnt care if they work or not). cul brian f.
> ----- Original Message -----
> From: "Tesla list" <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Thursday, January 10, 2002 10:07 AM
> Subject: Rewinding NST`s
>
> > Original poster: "Nebojsa Kovacevic by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <morfeus-at-EUnet.yu>
> >
> > 73
> > Hello All!
> >
> > I can see that most of you had problems, like I do, with burned NST`s.
> > The problem can be salved in many diferent ways as I can see from all of
> > you. I have had problems with two HV 15kV/30mA transformers lately. They
> > are now both rewinded by me. Now, the fact is that they are not NST`s.
> > Some other category which is not very important here.
> > Anyway, both transformers burned out after a short while of my
> > experimenting. When I opened them, I expected to see tar, but there was
> > some kind of plastic, like something in between the plastic and the wax.
> > It was really easy job to chop up and not damaging the
> > windings(fortunatly for me). Then I unwind the secondary, which is very
> > strange loking, it consists of two windings, separated by plastic, one
> > is for + and the other one is for -. I saw where the problem was, and
> > wind it again all over, it took me very long time to do that with
> > hair-thin wire. But, then I have had problem with insulator. I tryed
> > oil, all kinds of lastic, it was very hard to insulate that transformer
> > again. Then I saw where the problem was. The secondary is connected to
> > the body of the transformer with a wire that connects few first turns of
> > wire of the secondary, to the body of the transformer, that is to the
> > ground.
> > First thing was to disconnect that wire and try again. It worked
> > perfectly. I even got some more power(which I determined by the arc
> > lenght, and the streamers produced on my TC), because much ofthe power
> > was losted in that ground connection, which is, I am almost positive
> > now, not needed.
> > The main thing is that right now I don`t have absolutly no insulation in
> > my HV transformer, and have had no problems of any kind what so ever. I
> > have windings, that can be seen if you look in the transformers box. I
> > tested that tranny for an hour continously on my TC, and after that
> > period, I got some heating, which can not be compared to the heating I
> > have had during the previous period. The other one is also done this
> > way.
> > After these modifications, my coil is working perfectly, and I only need
> > to 'cool down my ears' after a few minutes period, the fact that is very
> > well known to you all-noise.
> >
> > Regards,
> > Nele   YU
> >
> >
> >
> >
> >
> >