WebDec 11, 2024 · Here's an example of a portable AM crystal radio that uses a short telescopic as a loaded ¼ λ antenna. The calculator showed a loading coil inductance of 9 mH, with the distance from the feed point taken as 0 and the wire diameter as 2 mm. Two available 4.7 mH moulded inductors were series-connected for the purpose. WebDOSTOV CR-1 Crystal Radio. Long version. 22.00 Moscow time. Medium waves. Ground on the left, antenna on the right. Welcome!
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WebJun 3, 2024 · It began when I ran across an interesting description of Heathkit’s legendary CR-1, a double-tuned good performer and very much sought-after by collectors as well as by users. The article described one homebrewer’s attempt to duplicate the receiver and to learn more about the detector and antenna tuning ferrite-loaded coil's secrets. WebRadios That Work For Free is the featured book. Coil Forms. Coil forms for building your crystal set, or multiband radio. Detectors. Peebles Originals offers a galena or pyrite detector stand for making a crystal radio as they did in the beginning. Headphones, Piezo Elements, Earphones. Piezo headphones for your crystal set dx adventures. Kits how do you bake turkey wings in the oven
High Performance Crystal Radios - Rabjohn
http://www.crystalaudio.com/ WebJun 21, 2024 · Any crystal radio worth building should have good sensitivity. That means that you should be able to hear even relatively distant and weak stations. Of course, crystal radios have no amplification and depend … WebAug 30, 2024 · Traditional crystal sets used sensitive high impedance headphones, typically several thousand Ohms, which are hard to obtain now. A crystal earpiece can be used, or a sensitive pair of walkman style … how do you bake with silicone bakeware