Re: Early versions of Tesla's coil

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

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

Tesla list wrote:
 >
 > Original poster: "John H. Couture by way of Terry Fritz 
<teslalist-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>
 >
 > RMC -
 >
 > It is a simple matter to test weather the device is a Tesla coil or an
 > induction coil. The Tesla coil uses dampened waves and the induction coil
 > uses pulses. All you need is a scope. If you have a Leak Detector that works
 > you may want to make this test.

Not so trivial. An induction coil does not use pulses. The circuit
is also made of two coupled resonators. The output waveform is also
a dampened sinusoid (actually two), although usually
with a shape very different from what is seen in a Tesla coil.
Without breakout, what is seen is:
Tesla coil: The output is the sum of two dampened sinusoids of
similar frequencies, resulting in beats, and after a few of them
the gap quenches and there is only a single dampened sinusoid, at
a third frequency between the other two. Frequencies in the
hundreds of kHz.
Induction coil: The output is a sum of two dampened sinusoids
of very different frequencies (due to the higher coupling), and
there are no beats of quenching. The frequencies are in the kHz
range.

Antonio Carlos M. de Queiroz