RE: [TCML] 5" Sparks - Approx 35 watts input power: Tesla was correct!

["Lau, Gary" <Gary.Lau@xxxxxx>]

The details of all contest entries are on the indicated web page.


> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of bartb
> Sent: Thursday, March 13, 2008 9:46 PM
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] 5" Sparks - Approx 35 watts input power: Tesla was correct!
>
> Hi John,
>
> Karl's report of 18.125" exceeds the formula by 1". So, small coils can
> do well. Wait, I'm assuming a small coil. Any specs on Karl's coil? The
> contest is about small power, not necessarily a small coil.
> Bart
>
> Lau, Gary wrote:
> > Hi John,
> >
> > My minicoil contest rules and results are at
> http://www.laushaus.com/tesla/minicoilcontest/index.htm
> >
> > Using a partially deshunted 4/20 NST to yield 38mA Isc, Karl Lindheimer reports
> getting up to 18.125".  I once achieved 16", but haven't been able to do any better.
> But the secret does appear to lie in going large with top load and pri/sec inductors.
> >
> > FWIW, my mini coil NST pulls 1.75Amps @120V from the wall with no PFC.  Not
> certain if this included the microwave oven fan for the spark gap, but that shouldn't
> account for much.
> >
> > Regards, Gary Lau
> > MA, USA
> >
> >
> >
> >> -----Original Message-----
> >> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> >> Behalf Of FutureT@xxxxxxx
> >> Sent: Wednesday, March 12, 2008 10:12 PM
> >> To: tesla@xxxxxxxxxx
> >> Subject: Re: [TCML] 5" Sparks - Approx 35 watts input power: Tesla was
> correct!
> >>
> >>
> >> Bart, Gary,
> >>
> >> Well now that you mention that, do you happen to remember
> >> what the results were for the best small coils in Gary's small coil  contest?
> >> I don't remember if those coil's performances met my formula or not.
> >> Maybe Gary can give some info here.
> >>
> >> When I built my TT-32 coil, it only gave 27" sparks instead of the
> >> 32" I expected.  It was built very similar to the TT-42 coil, but was
> >> smaller and used less power.  The results were below what my
> >> formula would expect.  It's possible there were higher losses in
> >> the particular transformer I used, or something similar.  I  didn't
> >> really look into that.  Maybe it wasn't really missing the mark
> >> by a full 5".  Maybe it only missed by 2" or so.  I've have to  check
> >> my notes.  This happens to be one of the things which is clearly
> >> annotated in my notes ( I think ).  The operating voltage was  lower,
> >> and that may contribute to under-performance.  So yes,
> >> there is hope for the small coils, that they may properly  obey the formula,
> >> if they are built carefully enough.
> >>
> >> Cheers,
> >> John
> >>
> >
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> >
> >
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