Re: 1/4 wave theory/cite the variance?

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

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

Ok, quick fun for all you math whizzes: 
   
  I am going to wind a coil with the following specs: 

Coil Diam.     8.125" 
winding length     30.0" 
wire gauge    20 
assumed turns per inch   29 
Toroid   8.0" x 22.44" 

what is the  "LC"  resonant freq?   what is the 1/4 lambda freq? 
(if you wanna get picky,  a precise conversion factor for that is  F =
245892.764/wire length = F in kHz) 
Mike 

>
> Paul, Terry, et al, 
>
> Perhaps your modern view and Tesla's view are both right?  The arguments 
> being brought up in favor of an adjustment to quarter wave are based on 
> tightly wound coils with self-capacitance and tightly coupled inductance 
> between the wires. 
>
> If you'll look carefully at all the pictures in CSN, you will see that all 
> of Tesla's coils are space wound, thus eliminating the effects you're 
> mentioning.  Also, Tesla utilizes space winding on his large flat spiral 
> secondary.  This should be a significant consideration when discussing 
> quarter wave in relation to Tesla's work. 
>
> Dave