I'm totally confused. I have built the following circuit with absolutely no result, not even a click. Even after reading through several other similar questions on the board I haven't debugged it.
I am using about 15 feet of wire for an antenna and the metal case of a circuit breaker for ground. I've tried using a 100uH coil from Radio Shack and a 15uH choke for the inductor. I've tried a variety of capacitors as well as an air variable 1.4 - 9.7 pF capacitor. From the LC calculators I've checked out I should have been able to get AM stations with the varicap/15uH choke combination. I have a glass type "switching" diode but I'm not absolutely sure it's germanium. I've used two different piezoelectric ceramic disks in place of the headphones. Right now I'm suspecting the piezo disks. Are they not high enough impedance for this to work, or is one of my other parts incorrect?