I want to make a crystal radio to listen to frequencies outside of AM band(below 540KHz and above 1700KHz), asking this on reddit I was told, I need to add more turns to the coil and use a larger variable capacitor. Even if I assemble this, I don't have a suitable earphone to listen to the music.
So my problem now is to either amply the signal or create an earphone with high impedance, I'm unable to buy such an earphone and they are not sold where I live.
Is there a way I can amplify the output or create high impedance earphones by modifying already available earphones? Or can I just connect the output of the crystal radio into a any speaker with 3.5mm input?
So my problem now is to either amply the signal or create an earphone with high impedance, I'm unable to buy such an earphone and they are not sold where I live.
Is there a way I can amplify the output or create high impedance earphones by modifying already available earphones? Or can I just connect the output of the crystal radio into a any speaker with 3.5mm input?