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On Sun, 14 Nov 2010 19:59:44 -0600, "amdx" wrote:
Hi Guys, Assuming I have a tank circuit on a crystal radio with a Z at resonance of 1.5 megaohms. How would I make an antenna and extract maximum signal and keep the Z at 750,000 ohms. If don't think that's what I want to do, tell me that too. :-) MikeK Hi Mike, Try thinking backwards. How much current through your headphones/ear pieces do you need to hear the signal you want? (This is assuming you are not amplifying the signal, which if that's the case, what's the point in building a xtal set?). What is the impedance of your headphones/ear pieces? They will dictate the "loaded Q" of your tank circuit. 73's Richard Clark, KB7QHC |
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