Re: [TCML] Depot NST Measurements

[bartb <bartb@xxxxxxxxxxxxxxxx>]

Hi DC,

The NST is contained in it's original case and potted with simple 
paraffin wax. Glad to see someone else getting large secondary current 
values with 1/2 shunts removed. Most likely, I'm approaching saturation 
and keeping it just under, but it still works fine. I run the NST at 
about 110V (thus my estimate of 200mA). I get 5 foot sparks most of the 
time, but they do go beyond that now and again. A bit much for a little 
4.5" coil. However, yesterday I checked the spark length estimate and 
I'm still under by about 10 to 15", so all is normal I guess.

Take care,
Bart

DC Cox wrote:
> Nice work on the measurements Bart.
>
> I was surprised to see you ran at 200 mA for 30 continuous minutes!
>
> Was the xmfr with shunts removed immersed in xmfr oil??
>
> I did a 12/60 also and got 190 mA with 1/2 the shunts removed.  Gives great
> coil performance with 4.5 ft sparks.  I only run for 45 sec bursts in xmfr
> oil.
>
> Dr. Resonance
>
>
>
>
> On Sun, Jun 29, 2008 at 3:44 PM, bartb <bartb@xxxxxxxxxxxxxxxx> wrote:
>
>   
> > Hi All,
> >
> > For someone not to long ago I mentioned I would remeasure my depotted 12/60
> > when my new hv probe arrived. Well, I had a chance today.
> >
> > I performed open and short circuit measurements. Using a variac, I adjusted
> > the NST input voltage in 10V increments up to 140V input.
> >
> > Here's the raw data table:
> > http://www.classictesla.com/temp/DepotNST_RawData.gif
> >
> > Here's a graph of input to output voltage (very linear):
> > http://www.classictesla.com/temp/DepotNST_VinVout.gif
> >
> > Here's a graph of short circuit current:
> > http://www.classictesla.com/temp/DepotNST_Is.gif
> >
> > And finally, here's a graph of the NST's coupling coefficient:
> > http://www.classictesla.com/temp/DepotNST_K.gif
> >
> > So, for my NST, it became extremely beefy with 1/2 the shunts removed. I
> > don't know what to say about others who have only doubled their secondary
> > current. My NST ended up at a little over 200mA (for where I normally run).
> > Obviously, I could send it to the grave if I pushed it too hard. But then,
> > I've also ran a 30 minute continuous run with it pushing 5 foot sparks and
> > there were no hiccups. Anyway, the data table speaks volumes.
> >
> > Take care,
> > Bart
> > _______________________________________________
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> > Tesla@xxxxxxxxxxxxxx
> > http://www.pupman.com/mailman/listinfo/tesla
> >
> >     
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