Re: Designing BIG Secondary Coil ASPECT ratios

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

Original poster: "D.C. Cox by way of Terry Fritz <twftesla-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>


Well, you are free to build any aspect ratio you wish, howver,

a 4.5: 1 will provide the best results.  1,500 turns is a nice optimum for
design work.

A 3:1 with a large coil will invite more strikes to the strike rail,
primary, etc, and usually stress the coil more, shorter coil with long
discharges equals more stress.

A taller coil and you may not get the best shock-excited coupling from the
primary, ie, too low coeff. coupling factor.

Dr. Resonance




----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, September 07, 2002 9:22 AM
Subject: RE: Designing BIG Secondary Coil ASPECT ratios


> Original poster: "Mccauley, Daniel H by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <daniel.h.mccauley-at-lmco-dot-com>
>
>
>
>
>
> >>>>>>>>>>>>>>>> I've read a lot of places that 3:1 aspect ratio (H/D) was
> optimum for coils larger than 12"???
> Is this true, or generally not followed.
>
> Thanks
>
>
>
> Would suggest 18 to 24 in dia with a 4.5:1 height to dia. ratio.  36 x 8
in
> toroid or 48 x 12 in toroid made inexpensively from McMaster-Carr
flex-lock
> aluminum duct hose, p/n 55335K for the 12 in. dia.and 55335K26 for the 8
in.
> dia x 25 ft length ---both under $20.  Have a local "real good" local
welder
> weld the ends together and also weld a support cross brace.  Cover with
> strips of Al tape from Home Depot and you're ready to roll.
>
> Dr. Resonance
>
>
>
>