Res cap size charge

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

Original poster: "Luke" <Bluu-at-cox-dot-net> 

I know it is not recommended to use a resonant size cap and that is not my 
intent.

Using ohms law for the impedance of an NST of 15KV 60mA gives 250k ohms
Using the capacitive reactance formula there the capacitance at 60Hz is 
0.0106mfd

Using 250k ohms and 0.0106mfd the RC time constant would be 2.65ms
Since the time to charge a cap is ¼ of the wave the time for cap charging 
at 60Hz is 4.17ms.
This works out to the cap going through 1.57 RC time constants for each 
charge cycle.
This is about 75% charged and 75% of 15KV is 11.2KV.

So using a resonant sized cap will give max voltage of 75% (11.2KV in this 
case).

Does this mean setting the spark gap (static) to fire at 11.2KV would give 
the same voltage to the system as if the gap were set to fire at 15kv? 
Since the 15kv from the NST would fire the gap but only 11.2KV would 
discharge from the cap into the primary.

I know that the amount of energy is not the same as the amount of 
voltage.  Energy is will be related to joules which is dependent on both 
voltage and cap size.  I am only talking about the amount of voltage 
present not the amount of energy.

Luke Galyan
Bluu-at-cox-dot-net