Re: Tesla Coil RF Transmitter

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: dave pierson <davep@xxxxxxxx>


> Suppose you have a flexible beam, solidly held at it's mid point. If 
> you grab one end with your hand, and slowly move one half of the 
> beam back and forth, you will be hard pressed to even detect the 
> slightest motion at the other half of the beam. But if you shake one 
> half of the beam at it's resonant frequency, and the other half has 
> the same resonant frequency, the amplitude of the motion will be 
> nearly identical on both halves, even though nothing is physically 
> shaking the other end.

   Vibration propagates within the material.
   To a lesser extent, thru motion in the support, and the air.
    perhaps retry the experiment with a 'damped' (ruberjawed) support....

> Let us not forget, Tesla did not even contemplate world power 
> transmission, until he measured standing waves produced by lightning strikes.

   ...or measured what he thought were ....

> Standing waves would mean the EM pulse produced by the lightning 
> strike is being reflected back to the source without much attenuation.

     Standing waves do not require low attenuation.
     (Low attenuation makes them easier to detect....)

> This would also mean the EM pulse travels all over the globe before 
> returning. Tesla didn't need the "shaking" in the earth to be 
> particularly strong, he just needed it to travel all over the globe. 
> The only way you can do that is by tuning to the resonant frequency 
> of the earth.

   Any rock in any pond produces ripples, standing waves, regardless 
of resonance...
   (Easily detectable waves occur when LOSSES are small.  This is 
separate from
   resonance....)

   best
    dwp