View single post by a19971828
 Posted: Nov 9th, 2011 03:58 PM
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a19971828

 

Joined: Nov 2nd, 2011
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 Ohhhh , well , is perfect ! , spark , you are a very wise person about this items , i am very glad to find a person like you , i send all my congratulations , this is the answer i was waiting , so , the ambient noise is a mixture of brown noise and white noise , great . But , if you say , is recomended a 4.7mh , i understand it , because the self resonant formula is :
F = 1/2*3.1416*L*C , when the L is the self inductance , and the C is the parasitic capacitance between turns of wire . If L is more High , the F is lower . But , i made calculations , and , the 0.5mh produce a F between 300-350 khz , and , this is out of medium wave band . Is it not correct , (0.5mh) , why raudive used 0.5 mh design ?