Re: Desktop Bipolar Coil

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

Original poster: "Malcolm Watts by way of Terry Fritz <teslalist-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>

Hi John (Freau),

On 2 Jul 2003, at 2:11, Tesla list wrote:

<snip>

 > >Random sparks can be turned into constant length sparks by using the
 > >controlled spark method. The output then becomes a constant energy output
 > >that can give a coiler an overall efficiency for his coil that makes sense.
 > >This appears to be the only option for the coiler at present.
 >
 >
 > How do you know that the controlled output spark length truly
 > represents the energy in the spark?  I believe it does not.  One could
 > have short sparks with high energy in the spark, and one could also
 > have long sparks with low energy in the spark.  This may depend
 > of toroid sizes, breakrates, and other factors perhaps.
 >
 > John

Hear hear! Single shot spark length has a very low dependence on
energy and a very high dependence on voltage (in repetitive
operation, those dependencies change considerably). You can easily
see this for yourself by changing the output voltage of the coil by
using different topload capacitances while maintaining the same
primary energy.

Malcolm