Re: Calculating Cap RMS current

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

Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> 


The spark gap radio pioneers did it as follows:

I  =  Vrms * sqr (CN/2R)

          where:

         I = rms current in Amperes

         V = rms potential in Volts

         C = capacitance in Farads

         R = circuit resistance in Ohms

         N = spark frequency in pulses/sec


You can also use a Pearson current xmfr to measure it directly and display
it on a DSO.  Then, the above equation can be solved for effective circuit
resistance in Ohms --- usually an unknown.

If you don't have a Pearson and a DSO, try to befriend someone at the EE
labs at a large university.  They could help you measure it directly.


Dr. Resonance

 >
 >
 > At 11:59 AM 2/21/2004, you wrote:
 > >Is there a formula out there for calculating the tank cap rms current?
 > >Just wondering how java tc gets it's numbers for that. Also for the
 > >primary resistance to put in, is that from the (2pi)FL formula? I keep
 > >getting answers way bigger (like 10-20 or more) than the default 3 ohms.
 >
 >
 >