MadSci Network: Physics

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

Date: Mon Aug 8 16:45:01 2005
Posted By: Douglas Eaton, Staff, Engineering, Varian Medical Systems
Area of science: Physics
ID: 1122575967.Ph

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.

Hope this answers your question.

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