Re: How does Heinrich Hertz measure the frequency of elctromagnetic waves generated from th spark gap?

Hello Abdullah,

The frequency of the transmitted signal is 

f = 1/( 2 * pi * sqrt(L * C ) )

where L is the inductance of the loop antenna and C is the capacitance of 
the condensor.  If L = 2 uH and C = 1.28 pF then the resultant frequency 
would be 3 MHz.

The following web site shows a nice example and explaination of the Hertz 
spark gap oscillator.
 http://www.fas.harvard.edu/~scdiroff/lds/Elect
ricityMagnetism/HertzResonator/HertzResonator.html



Hope this answers your question.