Re: JavaTC and Coil Design

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

Original poster: Bart Anderson <classi6-at-classictesla-dot-com> 

Hi Gregory,

The recommended wire size is simply a calc based on the 6 skin depth 
approximation, and if the bare wire diameter remains unchanged, then you'll 
see this figure change from run to run as the frequency changes with turns. 
It's not a critical value to be too concerned with. Should you be off by 
several gauges, then the secondary losses will be higher, but only if the 
wire is much thinner than recommended. It's just a recommendation, sort of 
like a derating to ensure RF losses are minimized, and in the overall 
scheme of things, secondary losses are small in comparison to other areas 
of the system, so it's not a big concern.

For the normal frequency range of TC's, just stay within 3 or 4 awg sizes.

Take care,
Bart

Tesla list wrote:

>Original poster: G <bog-at-cinci.rr-dot-com>
>Hello All,
>
>I have been running some numbers on JavaTC for a new coil design, and have 
>run into a slight problem. I am having trouble satisfying a secondary 
>winding ratio of 4.5:1 or 5:1 with Malcom's recommendation of a wire 6 
>skin depths thick, and with John Freau's recommendation of 1200-1500 
>turns. Does anyone have thoughts on which of these are most critical to 
>satisfy?
>
>Thanks,
>Gregory