Re: TC Optimum Coupling (was RE: Auto Quenching - OOPs!! forget that one ;-)

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

Original poster: "D.C. Cox by way of Terry Fritz <twftesla-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>


The k = 0.6 factor works great if you place the TC into a tank and fill with
SF6 pressurized gas at 120 PSI.  This works for scientific research and
particle acceleration but, of course, you can not see any sparks because the
purpose of the gas is to retard ion formation of any type.  We made a small
coil once of this type and bought the HV out through a massive bushing.  It
worked great but the bushing weighed about 10 times more than the entire
coil and tank housing!!  So much for light weight portable coils which was
our original goal.

Dr. Resonance




----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, September 02, 2002 7:08 AM
Subject: RE: TC Optimum Coupling (was RE: Auto Quenching - OOPs!! forget
that one ;-)


> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<Marco.Denicolai-at-tellabs-dot-com>
>
> Hi John,
>
> > Original poster: "John H. Couture by way of Terry Fritz
> > <twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>
> >
> >
> > Terry, Antonio, Marco, all -
> >
> > Tesla coil theory and simulations must be used with caution.
> > Increasing the
> > K factor of Tesla coils can increase the secondary volts
> > output? Reducing
> > the number of secondary turns can increase the K Factor. If
> > you continue
> > with this reasoning you might believe that you could use only a few
> > secondary turns for big sparks or secondary voltages. See below.
>
> You are supposed to act on the coupling factor k without changing L1,
> L2, C1 or C2. Otherwise your tuning (and voltage gain) will change too,
> mixing to the effect of the changed k. It is almost always about rising
> or lowering the secondary.
>
> > Marco Denicolai says to "increase K as much as possible"
> > (theory). But how
> > do you determine this parameter for a real world Tesla Coil?
> > Real world
> > Tesla coils generally mean compromises have to be made.
>
> Correct, that's why I don't believe many will strive to reach that k=0.6
> to win 18% in secondary voltage. I wouldn't...
>
> Best Regards
>
>