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Re: Not enough pimary inductance?
Hi Dan,
> Original Poster: ntesla-at-ntesla.csd.sc.edu
>
> >Original Poster: Ed Phillips <evp-at-pacbell-dot-net>
> >
> >"I had heard the well circulated wive's tale that off axis L would waste
> >energy. This test graphically proved that it does not.
> >
> >The practical conclusion is that it IS technically acceptable to place a
> >high quality air core tuning coil in series with the Tesla coil primary
> >coil in order to achieve 'fine tuning' without throwing away hard won RF
> >tank circuit energy!
> >
> >Real valuable knowledge gleaned by the actual doing.
> >
> >
> >Robert W. Stephens
> >
> >"
> >
> > That is, indeed, an old wive's tale. What will happen, however, is
> >that the coefficient of coupling will be reduced. However, that doesn't
> >mean any power will be lost, unless the added coil is lossy.
> >
> >Ed
>
> Hmmm...Doesn't that imply that one could have a slight over-coupled
> primary, add in an off-axis inductance, and use the off-axis coil to tune
> for magic k?
> Dan
Indeed! Of course you are also altering the primary inductance as
well so it might be difficult to separate tuning effects from
coupling effects using this approach.
Malcolm