Blue links lead to the fully translated html versions of the page, purple links lead to pages whose start pages (as well as introductions and tables of contents at least) are already set up, green links lead to extern sites, grey means that no file is available yet).
/Notes in this color and between two / are from the operator of the German mirror site and translator/.
The wiring diagram of the "crystal radio" in which a 1N34 germanium diode is used instead of galena crystals. A prototype of this radio was tested and it works for AM long wave. A description of the above radio is contained in the book [6FE], pages 39 to 42, and its electrical diagram is shown there on page 41.
Descriptions in that book [6FE] report that the 1N34 germanium diode crystal radio shown above consists of the following components: (A) - an antenna from 80 to 100 feet long (i.e. 24 to 30 meters), (L) - 150 coils of emailed wire (in English, "enameled wire 24 ga. ") wound on a paper tube with a diameter of 2 inches (5 cm) and a length of 4 inches (10 cm), (E) - a well-functioning ground (e.g. metal sewer pipes), (C) - a 365 pF reed capacitor (from an old radio), (G) - a 1N34 germanium diode (note that it can NOT be a silicon diode), (C2) - a 0.005 micro F disk capacitor for 35 volts, (H) - high impedance headphones (at least 2000 Ohms). I have also heard the opinion that instead of headphones (H) you can use a speaker with a transformer - whose windings replace the inductors from the headphones. Unfortunately, so far, I have NOT been able to confirm this opinion on some crystal radio design that has been proven in operation.