Re: toroid size

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

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <FutureT-at-aol-dot-com>

Greg,

My old research coil secondary was 4" dia x 23" tall, and the 
spark length was limited to about 60" at 120 bps.  As I went
over 60", I started to get racing sparks.  At 240 bps, I would
have been able to get longer sparks, maybe 80" or so.  Using
the 6" dia secondary, I was able to get a couple more inches
of spark length before the racing sparks began.
Based on this as a proportional comparison, you may be reaching 
the limit for spark length for your secondary for 200 bps.
I can't prove that things will scale up linearly, but they may
(or close to linearly anyway).

Some other folks may have coils of a similar height to yours,
with a simlar toroid size and may be getting long sparks at 
200 bps which would disprove what I say above?  

Cheers,
John


>
> John,
>
> The coil is 1m tall with nearly 1000 turns of 18AWG.
>
>
> Cheers,
>
> Greg.
>