Re: Tiny Tesla Coils

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

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

Tesla list wrote:
> 
> Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>"
<tesla-at-ian-dot-org>

> Great article, thanks!  So it looks like the big diffrence is that the
> primary and secondary coils are joined in an Oudin coil, and seperate in
> a Tesla coil?

The Oudin coil uses an autotransformer. The Tesla coil a two-coils
transformer.

> So what is the advantage to a Tesla coil?  More power or safety because of
> the coil seperation?

Functionally, both systems can be made exactly equivalent by simple
circuit
transformations. No clear advantage in power output. In practice, the 
Tesla system is safer because the high-voltage, low-current, secondary 
is insulated from the dangerous low-impedance primary circuit. 
A small Tesla coil secondary with and open connection to ground can
shock
you, but an Oudin coil with the lower end accidentally ungrounded will
connect the power supply directly to the terminal, and can be lethal.

Antonio Carlos M. de Queiroz