Re: SSTC does 10 foot sparks

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

Original poster: "Jim Mitchell" <Electrontube-at-sbcglobal-dot-net> 

I think you missunderstood.  Steve said the power in was UNDER 4800w because
his 20A fuse never blew.  I don't know how it can be possible to make
energy, so his power output is probably less then the input ;0)  Though
ISSTCs are pretty efficient.  The pulsed powers in the primary are around
300kW I believe,  but that is not the continuous average power.

Regards - Jim Mitchell
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, June 18, 2004 7:34 PM
Subject: Re: SSTC does 10 foot sparks


 > Original poster: "John Couture" <johncouture-at-bellsouth-dot-net>
 >
 > Steve -
 >
 > Congratulations on your getting 10 foot output sparks from your SSTC coil
 > with 4800 watts input. Do you know that the power output of your Tesla
coil
 > can be much greater than the power input? In other words the output power
of
 > your
 > TC can be much greater than the input of 4800 watts. This means the power
 > efficiencies (power output/power input) of your TC  can be well over 100
 > percent. It is very difficult if not impossible to determine the true
power
 > input or power output for a particular output spark. The ratio of power
 > output to power input is mostly an unknown for TC's. To my knowledge no
 > coiler has ever properly made these measurements.
 >
 >   This is why it makes more engineering sense to use energy input and
energy
 > output in rating TC's. The energy efficiency is then equal to energy
 > output/energy input. This efficiency is always less than one or 100
percent
 > and can be measured as I have shown in the past.
 >
 > As a final comment and to avoid muddying the waters I believe the
statement
 > "4800 watts input for a 10 foot spark" is an acceptable wording for rating
 > TC's in a free speech country. The pictures of those sparks show that no
 > matter what you call them they represent a great achievement in Tesla coil
 > progress for SSTC's.
 >
 > John Couture
 > ---------------------------------------
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Friday, June 18, 2004 1:52 PM
 > Subject: Re: SSTC does 10 foot sparks
 >
 >
 >  > Original poster: "Steven Ward" <srward16-at-hotmail-dot-com>
 >  >
 >  > Oops, forgot to mention the power consumption is less than 4800W... not
 >  > exactly sure because i dont have a watt meter that big but i have it
both
 >  > fused and breakered to 20A and even after quite long runs it has never
 >  > popped the fuses or breakers.  My guess is around 4kw to make 10 foot
 >  > sparks.  Solid State is the only way i would ever have a coil this
large
 > at
 >  > my house... i cant really feed a pig on my 20A line.
 >  >
 >  > Anyway, i ran the coil again last night for a pretty long time.  We had
a
 >  > "cage of death" set up so i limited my output to 7 feet (though it hit
the
 >  > ground at 9 feet several times as well).  At this distance there arent
 >  > streamers... just power arcs to the cage the whole time.  The friends
all
 >  > loved it and we had a fun safe night that went without problems ;)
 >  >
 >  > Steve Ward
 >  >
 >  >
 >  > >From: "Tesla list" <tesla-at-pupman-dot-com>
 >  > >To: tesla-at-pupman-dot-com
 >  > >Subject: Re: SSTC does 10 foot sparks
 >  > >Date: Thu, 17 Jun 2004 18:54:02 -0600
 >  > >
 >  > >Original poster: "Brian" <ka1bbg-at-webryders-dot-net>
 >  > >
 >  > >Hi, NICE! do you have any idea what the power input is? you are "HOT"
on
 >  > >these ss coils! cul brian f.
 >  > >----- Original Message -----
 >  > >From: "Tesla list" <tesla-at-pupman-dot-com>
 >  > >To: <tesla-at-pupman-dot-com>
 >  > >Sent: Thursday, June 17, 2004 10:46 AM
 >  > >Subject: SSTC does 10 foot sparks
 >  > >
 >  > >
 >  > > > Original poster: "Steven Ward" <srward16-at-hotmail-dot-com>
 >  > > >
 >  > > > Coilers,
 >  > > >
 >  > > > Recently there has been a lot of advancements in the SSTC area of
 > coiling.
 >  > > > Im proud to be the first (or at least i *think* im the first) to
 > achieve
 >  > >10
 >  > > > foot (or better) sparks from a solid state tesla coil!  The design
is
 >  > > > similar to that of my first ISSTC but using more robust gate
drivers
 > and
 >  > > > switching devices, and of course MUCH larger coils.
 >  > > >
 >  > > > I will eventually get the details up on my site, but for now here
are
 > some
 >  > > > pictures:
 >  > > >
 >  > > > http://www.hot-streamer-dot-com/srward16/ISSTCII/ISSTCII_goodpics/
 >  > > >
 >  > > > In some of the pics you will see it arcing to a green chair in the
 >  > > > forground, this is 115"... a few times it struck out beyond that at
(i
 >  > > > approximate) 125".  And i havent even put the max voltage on it!
Im
 >  > > > limited by the ground being so close ;)  The coil stands 5" taller
 > than
 >  > > > myself at 6'11".  The output is fierce and constantly power arcs to
 >  > >objects
 >  > > > in the 9 foot range with some scattered action at 10+'... im sure
if i
 > set
 >  > > > it up just right i can get about 12 feet from this monster and that
is
 > my
 >  > > > goal (it was 9 feet but that was effortlessly achieved).
 >  > > >
 >  > > > Enjoy!
 >  > > >
 >  > > > All comments welcome.
 >  > > >
 >  > > > Steve Ward
 >  > > >
 >  > > > _
 >  > > >
 >  > > >
 >  > > >
 >  >