Re: Bang size and break-rate

-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Thursday, June 10, 1999 1:57 AM
Subject: Re: Bang size and break-rate

>Original Poster: Finn Hammer <f-hammer-at-post5.tele.dk>
---------------------------  big snip

>It is my impression, from my own experience, and from looking at
>numerous sites, that the first coil that a person builds is made to meet
>the "many primary turns" criteria, the next, and bigger coil is
>frequently not. Many of the big coils have 4-5 turns primarys, Bill
>Wysoc`s model 14 has only 2. (ok!, it`s a maggie, but still...)
>So, is there some mechanism inherent in really big coils that allow for
>these low primary turns counts, or are the newcomers making a lot of
>primary turns in vain, for the sake of a (perhaps) outdated tradition.


  As mentioned before on this List the magnetic flux linking the primary
coil to the secondary coil is a function of current times turns normally
called "ampere turns". You can reduce the turns without affecting the flux
linkages if the primary current is increased. The problem is that coilers do
not make the primary wiring large enough for the increased current. A
computer program should take this into account. The JHCTES program
recommends a wire size (in square inches) to make this adjustment.

  John Couture


>If not, I would feel tempted to push for 30 kV in my next design, for
>low C, high L, even though I alresdy have experienced some of the
>problems of insulating to 20 kV in my present tank circuit.
>Cheers, Finn