TC Secondary Turns

Subject:  TC Secondary Turns
  Date:   Mon, 9 Jun 1997 03:56:40 +0000
  From:   "John H. Couture" <couturejh-at-worldnet.att-dot-net>
    To:   Tesla List <tesla-at-pupman-dot-com>

>Date: Sat, 07 Jun 1997 23:23:04
>To: Tesla List <tesls-at-pupman-dot-com>
>From: "John H. Couture" <couturejh-at-worldnet.att-dot-net>
>Subject: TC Secondary Turns
> To All -
> It looks like Tesla coilers have gone full circle when it comes to the
number of TC secondary turns. Several years ago the recommended number
sec turns was about 400, then it went up to 1000, now it is back to 400
> Of course the reason 1000 turns were being used is because 400 turns of
enameled magnet wire were used by newcommers and secondaries were being
destroyed when going to higher powers. However, 1000 turns does not
to be optimun because some coilers are now doing better with about 400
but with more insulation for the higher powers. 
> The question now arises as to how should the secondary be designed for a
certain input power to the TC to give optimun spark length? Assuming
about 400 turns is optimun for all sizes of coils what should the wire
and insulation be? Also what size should the secondary radius be to give
secondary inductance and mutual inductance for producing the optimun
length? This optimun spark length may be equal to or greater than with
>  There are a few TC computer programs that give recommendations including
the JHCTES computer program. The programs use either empirical data or
programmer's guesstimates. There are no standards for estimating the
secondary voltage or the rating of wire insulation for Tesla coil work.
Agreement will have to be reached amongst coilers for these parameters
before any further progress can be made for designing Tesla coils.
>  All comments are welcomed.
>  John Couture