Re: Resonant Frequency

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Goinbonkers-at-aol-dot-com>

Hi all, 
   I think I mentioned this before, but from what I  calculated,  a closewound
coil with no topload and an aspect ratio of approximately 0.30 will result in a
quarter wave resonant coil.    
Mike 



>
> 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. 
> -- 
> Paul Nicholson