NONDK Crystal Radio Simple Electronic Circuit Board Assembly Can Receive Radio Signals Normally DIY Radio Kit

The key to the success of a crystal radio is to be to connect a very long antenna (preferably over 10 meters) and a good ground wire! A must-go for radio enthusiasts. Low-impedance headphones are fine. No headphones are provided. Bring your own headphones! This radio already has an impedance matching transformer, so you can use low-impedance headphones. The reception conditions in different places are also different. If you have the ability to , you can change the number of turns of the magnetic bar coil to receive more radio stations in a range.