Re: TC knowledge

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

Original poster: "Finn Hammer by way of Terry Fritz <twftesla-at-qwest-dot-net>" <f-hammer-at-post5.tele.dk>

Robert.

A matter of opinion. I see little merit in telling kids something which
is wrong, and then claim that they have had the opportunity to learn
something.

Chers, finn hammer

Tesla list wrote:
> 
> Original poster: "rheidlebaugh by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>
> 
> What you have said is correct. I stated a simple ideal view of a coil.
> Losses are a real life factor, but what point of your explanation is of any
> value to a child wanting to know why a TC works.
>    Robert  H
> 
> > From: "Tesla list" <tesla-at-pupman-dot-com>
> > Date: Tue, 08 Jan 2002 17:24:57 -0700
> > To: tesla-at-pupman-dot-com
> > Subject: Re: TC knowledge
> > Resent-From: tesla-at-pupman-dot-com
> > Resent-Date: Tue, 8 Jan 2002 17:46:42 -0700
> >
> > Original poster: "Finn Hammer by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> > <f-hammer-at-post5.tele.dk>
> >
> > Robert, all!
> >
> > While it is true that a tesla coil is a transformer, it is not true that
> > it responds in a turns ratio fasion, when operating in disruptive mode.
> > Loose coupled coils take time to transfer the energy from one coil to
> > the other, and the amount of oscillations that it takes to transfer the
> > energy is determined by the coupling factor. With the coupling factors
> > that are typically involved in tesla coiling (0.1-0.2) it takes from
> > 8-16 cycles to make a full transfer from primary to secondary.
> > With regard to top voltage, this is a question of how much energy that
> > ends up in the toroid.
> > Let`s say that the primary capacitor is 50nF and that it is charged to
> > 20kV at the time where the sparkgap breaks down and starts conducting.
> > It then holds a charge of Epri=(Vpri^2)*Cpri/2 =
> > 20000*20000*0.0000005/2=10joule.
> > When this charge is transferred to the top terminal, the resulting
> > voltage is:
> > Vtop=sqrt(2*Epri/Ctop) For a top capacity of, say, 40 Pico Farads the
> > max. voltage will be:707106 volts.
> >
> > This is not an impossible value, provided that the secondary coil is
> > long enough to hold off the voltage, the toroid is smooth enough, and
> > has a minor diametre large enough to prevent breakout at less than
> > that,and assuming a lossless gap. (and ignoring coil self capacitance)
> >
> > Let`s not get carried away with unrealistic claims of multi million
> > volts on the top terminal, only a few coils exceed 1 million volts.
> >
> > Cheers, Finn Hammer
> >
> > Tesla list wrote:
> >>
> >> Original poster: "rheidlebaugh by way of Terry Fritz
> > <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>
> >>
> >> A TC is a special transformer. In a transformer when you put a voltage in
> >> the primary the voltage will be the same out as the ratio of turns. If you
> >> have 10 turns in the primary and 100 turns in the secondary the output
> >> voltage will be 10 times larger. Most TC coils have about 1: 100
turns. The
> >> voltage in is about 20'000v so the output can be 2,000,000V. No this
is not
> >> all, but it is a over view of how it works. My small class room TC starts
> >> with 100V and puts out 10,000V.
> >> Robert  H
> >>
> >
> >
> >