While no one can argue with "bigger is better", I take exception with the
suggestion that the NST needs to be at lest 7kV. I have had very
satisfying results using a fist-size core and coil 4kV/20mA NST. See
http://www.laushaus.com/tesla/minicoil.htm
And along the lines of bigger, the best results I've had with the 4/20 were
with a 4.25" x 10" secondary and a 3.5" x 11" topload (not yet documented
on my site). Conventional thinking would have far smaller features - don't
be afraid to be big!
Regards, Gary Lau
MA, USA
On Thu, Jul 31, 2014 at 11:00 PM, Jon Danniken <danniken@xxxxx> wrote:
> On 07/31/2014 06:02 PM, mddeming--- via Tesla wrote:
> [snip]
> >Over the years (50+) I
> > have used Alanson, Franceformer, and Actown NSTs with reasonable
> > results. You will want to get "Old-style" NSTs that weigh about "2
> > hernias".
>
> An added bonus of finding an old-style tranny is that if you get one
> that is potted in tar you can unpot them and remove some of the current
> limiting shunts, which is typically done to provide two to three times
> (max) the nameplate-rated current.
>
> This will obviously increase the current draw of the transformer, but
> for short runs in a tesla coil application it is usually fine (I doubled
> the current output of both a 12/60 and 15/60 that I have, and they work
> great).
>
> Something to think about for when you get down the road and done with
> your current coil.
>
> Jon
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