Hi
I have been trying to make a simple radio circuit. I don't think there is a schematic on the web I haven't seen now...but this is the one I am trying to get working now and here is the page explaining it.
Whatever I do, nothing happens. I don't hear anything at all in my crystal earphone.
I have tried with a coil I wound myself (100 turns of magnet wire on a ferrite core) and some coils from old radios, plus a coil I bought from Rapid.
I've also tried with a number of different capacitors, all bought from Rapid. Like the coil I bought from them, the datasheet is completely unfathomable.
So that leaves me not really sure how to connect the capacitor (one with 3 leads, one with 6) or the coil (mine has two leads, the others all have 4)
The thing is - I'm not sure what I SHOULD be hearing when it 'works'. Even if there is no station nearby, or the tank circuit is the wrong frequency, should I not still hear at least some static like on a normal radio? At least that would be something. At the moment there's just nothing at all.
And does anyone by any chance have an image they could show me of how to connect up the capacitor and the coil? It looks like there is two windings, but I don't get what they are..
Sorry this is such a vague post, but I've read literally 40 different instructions, and watched all sorts of videos...but it never shows the connections clearly enough for me to translate to the components I have...
I have been trying to make a simple radio circuit. I don't think there is a schematic on the web I haven't seen now...but this is the one I am trying to get working now and here is the page explaining it.
Whatever I do, nothing happens. I don't hear anything at all in my crystal earphone.
I have tried with a coil I wound myself (100 turns of magnet wire on a ferrite core) and some coils from old radios, plus a coil I bought from Rapid.
I've also tried with a number of different capacitors, all bought from Rapid. Like the coil I bought from them, the datasheet is completely unfathomable.
So that leaves me not really sure how to connect the capacitor (one with 3 leads, one with 6) or the coil (mine has two leads, the others all have 4)
The thing is - I'm not sure what I SHOULD be hearing when it 'works'. Even if there is no station nearby, or the tank circuit is the wrong frequency, should I not still hear at least some static like on a normal radio? At least that would be something. At the moment there's just nothing at all.
And does anyone by any chance have an image they could show me of how to connect up the capacitor and the coil? It looks like there is two windings, but I don't get what they are..
Sorry this is such a vague post, but I've read literally 40 different instructions, and watched all sorts of videos...but it never shows the connections clearly enough for me to translate to the components I have...