Re: [TCML] Yet another NST Depotting Topic

[bartb <bartb@xxxxxxxxxxxxxxxx>]

Hi Phillip,

As I mentioned to someone else recently with the same size NST and 
depotting situation. I personally would not go over 100mA output. The 
main thing is to be able to run full voltage without running into core 
saturation. If you remove too many shunts, then core saturation will 
occur at lower output voltages which is the last thing you want.

Test it. Remove about 1/2 the shunts then dry test and measure the 
output current in a shorted output test. Also measure the input current 
in the same test to ensure it doesn't climb too high at full voltage 
input. If you want to run it right to the edge, then you will have to 
remove a few shunts at a time and redo measurements. Find out where 
saturation occurs at full voltage, then back to give your self some 
margin by reinstalling some shunts.

Also, "if" you are going to run it at the edge of core saturation and 
the core gets really hot really fast, then you should choose oil to help 
heat dissipation.

Take care,
Bart

Phillip Slawinski wrote:
> As previously stated, I have a step up transformer.  I'm wondering how much
> current I can get out of the 15/30 without it having a melt down after 5
> minutes of continuous operation.
>
> On Tue, Jul 8, 2008 at 12:26 PM, Jim Mora <wavetuner@xxxxxxxxx> wrote:
>
>   
> > Da, that would double the output voltage by doubling the turns ratio.
> > Jim
> >
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
> > Of Lau, Gary
> > Sent: Tuesday, July 08, 2008 7:08 AM
> > To: Tesla Coil Mailing List
> > Subject: RE: [TCML] Yet another NST Depotting Topic
> >
> > The 277V primary voltage makes this a less than ideal unit to invest in;
> > are
> > you sure it's worth the effort?
> >
> > Regards, Gary Lau
> > MA, USA
> >
> >     
> > > -----Original Message-----
> > > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> > > Behalf Of Phillip Slawinski
> > > Sent: Tuesday, July 08, 2008 12:14 AM
> > > To: Tesla Coil Mailing List
> > > Subject: [TCML] Yet another NST Depotting Topic
> > >
> > > Those of you who have been following my topics so far will not be
> > >       
> > surprised
> >     
> > > to hear that I have depotted yet another NST.  With five NSTs under my
> > >       
> > belt
> >     
> > > I can confidently say that I've got this down to a science.  I can knock
> > >       
> > one
> >     
> > > out in just a few hours with little mess.
> > >
> > > The transformer I just depotted is a a 277V 15/30 Franceformer.  Does
> > >       
> > anyone
> >     
> > > have an opinion on what the most current I can pull out of this is?  I'll
> > >       
> > be
> >     
> > > putting it under oil or potting it in wax, I haven't decided yet.
> > >       
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