Re: New Coil Design

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

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

Hi Ben, 
        This limitation is actually a recommendation based on rule of thumb. 
Short coils tend to have an arcing to ground problem, while long skinny ones 
have a lower L/R ratio, and coupling becomes more problematic with 
excessively long coils. Actually, the L/R ratio is maximized when H=0.45D, 
but short coils have a very high Volt/turn ratio which increases dangers of 
arcing. 
1:3 to 1:5 is a good compromise and is aesthetically balanced, but NOT gospel. 

Matt D. 



In a message dated 9/5/01 9:50:25 PM Eastern Daylight Time, tesla-at-pupman-dot-com 
writes: 


>
>    John, 
>    I have recently heard that there is a limitation of secondary width to 
> height ranging form 1:3 through 1:5 . That would make the desingn you 
> suggested for the 2.5 inch diamtere by 17inch tall impossible. I wondered if 
> you looked over this fact or if it would work , regardless of the ratio? 
>     Ben 
>
>