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Re: Why does top capacitance work? (fwd)
Malcolm Watts wrote:
>
> Hi John,
> The problem I have with using different k's is that the
> gap losses being the defining losses in the system are going to be
> quite different for each. How can you compare an extra coil system
> with a two-coil system when the losses are different? I think you'll
> discover nothing about the merits of the different approaches with
> regard to operational mode.
>
> > > >I believe the comparisons should be made using the K that produces the
> > > maximum spark for the system. This is because the magnifier system requires
> > > a high K secondary but the classical coil uses a lower K. Only the input
> > > wattage would be fixed.
> > > >
> > > >I often wondered if a critically coupled classical coil would be superior
> > > to other combinations. I do not believe a critically coupled coil has ever
> > > been built. There are several parameters that have to be coordinated. Rp
> > > would have to equal Rs and Lm = sqrt(RpRs)/(6.283 F). Also Lm = K
> > > sqrt(LpLs). Note that critical coupling involves more than only a single
> > > hump test.
>
> I would say that in order to state that unequivocally, one first has
> to define things even more closely - e.g critically coupled while the
> secondary is ringing up but not issuing sparks? While it is issuing
> sparks and the gap is still alight?
>
> What say?
> Malcolm