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

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

Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz <twftesla-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>

Tesla list wrote:
> 
> 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.

The increase in k increases the output voltage -if- it can be increased
without changing the primary or the secondary coils, and the system is
correctly tuned. The increase os just due to faster energy transfer,
with less time for energy dissipation in the various losses of the 
system. With fixed inductances and correct tuning, the maximum voltage
gain is fixed as sqrt(L2/L1) (or, more exactly, sqrt(C1/C2), because
it's possible to exceed the former by a small margin detuning the
system) for any value of k, if all the losses are negligible.
To increase k by decreasing L2 usually decreases the gain, although in
some very lossy systems some gain can, apparently, be obtained.

Antonio Carlos M. de Queiroz