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Re: Gap Dwell Times (formerly: Beating Solved)



Tesla List wrote:
> Man this thing is gettin' big!  I just snipped 11 pounds of foregoing 
text!!!!!
> >
> > Skip,
> >
> > I can't speak for Malcolm's interpretation, but a system is normally
> > considered fully rung up at the first maximum of the damped resonant
> > wave.  It is rung down at the end of the wave train of damped
> > oscillations.
> >
> > A lot of folks think the primary rings are transferred to the secondary!
> >  Well,.... yes and no.  If you do not quench your primary circuit arc
> > quickly enough, yes!  If you quench the arc at the first zero crossing of
> > the primary volatge peak, no!
> >
> > Remember that the primary is a complete resonant circuit all by itself.
> > The secondary is also a complete and separate resonant circuit unique to
> > itself.
> >
> > Ideally, we want to dump the magnetic energy we have expanded out from
> > the primary winding into the secondary.  But, before the secondary has a
> > chance to "talk back" or do an "inductive dance" with the primary, we
> > want the primary circuit OPEN (it doesn't exisit as a current carrying
> > path anymore)  That is, there no longer exists a ringing in the primary
> > circuit.  The magnetic energy we sent out from the capacitor blast, now
> > falls in on the secondary and the secondary is absolutely free to ring up
> > and down without the primary system interacting with it in any way.
> >
> > This is ideal action according to a number of theoretical approaches as
> > well as the Corums.  The spectral purity of the secondary is preserved.
> > I am not 100% convinced that this gives best spark.  I am convinced this
> > gives the best RF wave.
> >
> > Richard Hull, TCBOR
> 
> Richard and all
> 
> This brings up a question which has been on my mind for a long, long
> time.
> 
> If we only want the primary to ring up for 1/2 cycle .... why is it
> necessary that the primary and secondary be correctly tuned? I know this
> to be true and you know that I continue to try to build a 1/4 wave
> secondary but I still can't put it together. Why can't we just closely
> couple the primary to the secondary and jam the power in? I guess I need
> something physical to put picture what is going on. I will certainly
> appreciate any light that the group can shed on this.
> 
> Skip Greiner

Skip,  

A first rate question!!! One of the best yet!!!  You really are 
thoughtful in your posers!

It is a matter of "shock excitment"  or shock exciting.  It is the very 
nature of and at the core of the spark operated Tesla coil system!  
Anything, a table, a building, a bell, a window pane or a coil may be 
shock excited into resonance at its self resonant frequency!

  Have you ever fired a gun near a bell?  I have.  The gun's report has a 
low frequency but exstremely sharp expanding air shock wave.  As it 
intercepts the bell, the bell rings at a much higher frequency, 
nonethless.  The reason for the transfer was the rapidity of rise of the 
wave.  Most of the energy hitting the bell is not transfereed to the 
bell, however, due to its not being in step with the bell's natural 
resonant frequency.

If the tuned primary is shock excited (Spark gap), the resultant magnetic 
energy from even one half wave of its ring up is instep with the 
secondary and sharp, too!  This is the reason for the functioning of 
systems with proper or even improper quench!  This assumes loose 
coupling.  At very high couplings where the maximum energy can be 
transferred (reduced losses by as much as 300%), the quench becomes 
hyper-critcal!!  This is why the magnifier which operates at at least 3X 
the normal coupling requires such a special gap system.  The energy is 
transferred to the secondary and the current in the system goes to the 
moon, but the Q is down due to the tight coupling.  This new hot resonant 
energy is a virtual transform of the voltage!  It is then directly base 
couplied to a free standing resonator which is free to develop maximum 
potential without a trace of inductive beating.

Richard Hull, TCBOR