Re: New Coil: From Scratch

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

Original poster: "Jason Petrou by way of Terry Fritz <twftesla-at-uswest-dot-net>" <jasonp-at-btinternet-dot-com>

> i know some people design their coils around the topload and some have
> other wyas, but i usually like to start with the secondary. im thinking of
> something like 8 to 12 inches in diameter. ive seen coils such as terry's
> 10 inche diameter that are wound 10 inches, and some longer. i had thought
> that the rule of diamter x 4 was pretty good but once again there are so
> many variences its hard to decide which kinds might be the most
> successful.

I design areound the secondary - it takes the longest to build! also piping
only comes in set sizes, etc.

> also primary design. the last coils i stuck with a flat primary. can
> someone list some advantages/disadvangtages of flat and cone shaped
> primaries?

There is a lot of debate about primary shapes. Some people insist that flat
archemidies spirals are the best, some people prefer the inverse conical
trpe and some people go for helical. Personally i go for the flat spiral
because it increases the distance from the topload and reduces the risk or
primary strikes or ground ring spikes.

Jason
"If it doesn't work, Increase the voltage!"