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Re: Gap Dwell Times (formerly: Beating Solved)
Tesla List wrote:
>
> >From hullr-at-whitlock-dot-comWed Oct 9 22:12:30 1996
> Date: Wed, 09 Oct 1996 12:39:12 -0700
> From: Richard Hull <hullr-at-whitlock-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: 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
Richard and all
OK, I hear you but..... I think they are called Oudin coils where the
primary is the first few lower turns of the secondary. Suppose we use
your super fast quenching gap and a secondary where the lower 5 to 20
turns are the primary. Let us now dump into the "primary" some great big
pulses and immediately quench the gap. we now have a bunch of energy in
a two coil system with no place to go but "UP". I think we now have a
100% coupled system and a lot of energy in it. Why do we need resonance
to get a transformation of this energy into the secondary...it's already
there!
Thanks for your insight.
Skip