K formula?

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

Original poster: "Peter Lawrence by way of Terry Fritz <teslalist-at-qwest-dot-net>" <Peter.Lawrence-at-Sun.COM>


Is there a formula for the K (coupling coeff) given that I know the two
resonant frequences that the combined primary plus secondary have.

Here are some example data I collected last weekend,

204.8 KHz primary and secondary resonant frequency, when measured appart.
Then when together at various secondary heights I get:

at 0" 	193.42  and  216.10  KHz resonances,  22.8 Hz appart
	
at .5" 	194.72  and  214.86  KHz resonances,  20.1 Hz appart

at 1" 	195.83  and  213.81  KHz resonances,  18 Hz appart

at 1.5" 196.92  and  212.70  KHz resonances,  15.8 Hz appart


thanks,
-Pete Lawrence.