Re: Tesla Coil Operation - was "Harmonics"

John H. Couture wrote:

>   The Tesla coil operation has no mechanical or other electrical analogy.

It has. Two pendulums (penduli?) with identical lengths (same resonant
frequency) and different weights (different impedance levels) are
coupled in a way that produces a high swing in the lighter pendulum
when the swing in the heavier pendulum is small (a transformer
with high turns ratio). This may be a light inclinated bar connected
to their strings (use a fixed width font to see the ASCII drawing):

         |   |
         |\  |
         | \ |
         |  \|
         |   |
         o   O

If you set the heavier pendulum in motion ("O", the "primary"), it
will make the lighter pendulum ("o", the "secondary") swing with
increasing amplitude, as its swing amplitude decays. Eventually
only the lighter pendulum is oscillating, and the process reverts.
The result is the same beating oscillations observed in Tesla coils. 
I tried this experiment, and it works perfectly.
No sparks, of course ;)

Antonio Carlos M. de Queiroz