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| Posted: Nov 6th, 2011 05:43 PM |
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a19971828
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Hi joe , very thanks for your answer , but , is not a precise answer . You say , noise ambient signal , what is it ? , the raudive diode , is , the same , like a radio galena circuit . The galena radio´s circuit is the same , but , added a capacitor to select the stations . If we consider , raudive´s diode dont have this capacitor , it means , the radio is selected in only one frecuency , this frecuency , is the self-resonance coil frecuency. It would be know by a dip meter , or making a calculation of the inductance , and the parasitic capacitance of coil . But , in the most areas , there are strong radio frecuencies , so , the diode will receive this stations , because , is a radio , primitive radio . The weak select capacity of this instrument , allow any station who is near , or strong , could be captured and listen in record or speaker . So , How can i make to receive only the "noise ambient signal" whithout stations ? . Many could think , whith a faraday cage , but , the problem is , the station is captured by the anthena , not by the circuit . Another question , how do you know the original idea of raudive´s diode ? , This idea is written in "breakthrough" book ? . In this video , you can see a radio galena , and circuit , is the same like raudive´s diode , only differente by the selection capacitor . http://www.youtube.com/watch?v=ZsqxrxVR6pk&feature=related
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