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Conical Resonace Re: Resonant Frequency
Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>" <davep-at-quik-dot-com>
> > Dave Thomson wrote:
> > > Does this suggest a cone might resonate exactly at quarter wave?
> > A cracking good hypothesis. We see helicals going one way, and
> > if flats turn out to be going the other way, then there must
> > surely be an intermediate shape in which the effect of winding
> > on the inductive coupling just cancels the effect of increasing
> > capacitance.
One suspects one needs to define the 'aspect ratio'
(or equivalent term) for the cone. If the 'angle'
of the cone is 179 degrees, it is. essentially,
a flat coil. If the angle be 1 degree, the coil
is essentially solenoidal. I suggest that reports on
conical coils state the angle... (by eye, from the
illos, 30 degrees or so is about it. Measurements
would be better...)