40 crystal radio diagram
This is an high impedance earplug- very sensitive. You can get these from Crystal Radio Society or from Antique Electronic Supply. If you are going to build the radio in diagram 2 you will need the variable capacitor- If you cannot find one in an old junk radio then you can purchase one from either of the two suppliers above. crystal receiver with maximum sensitivity. Circuit diagram 1 Circuit diagram of the crystal receiver, which we are going to design for maximum sensitivity at weak signals. This can be a detector circuit of a 2 circuit receiver. But also a receiver with loop antenna. RPrepresents the losses in coil L and tuner capacitor C1 Circuit diagram 2 from Berlin. Here is the diagram: In the "Strays" section of QST for July, 1944, another mention is made of the razor blade foxhole radio: According to Toivo Kujanpaa, a licensed ham op stationed on the Anzio Beachhead, several of the radio men there rigged up a field version of a "crystal" set usin...