T
treez
Guest
Hello,
I made a crystal radio {no batteries, just a ferrite rod antenna, adjustable air dielectric capacitor, and a switching diode (for demodulation) and a crystal microphone.}
I put the earpiece in my ear and heard nothing, it did not work. Then I connected the ground of the circuit to earth ground ( which I got from a mains plug socket) ....and it then worked well.
Why was this?
Why does electromagnetic noise choose to flow away to earth?
If i had been on an aeroplane, (obviously with no earth conection), then to what would i have had to connect it to get it to work?
I made a crystal radio {no batteries, just a ferrite rod antenna, adjustable air dielectric capacitor, and a switching diode (for demodulation) and a crystal microphone.}
I put the earpiece in my ear and heard nothing, it did not work. Then I connected the ground of the circuit to earth ground ( which I got from a mains plug socket) ....and it then worked well.
Why was this?
Why does electromagnetic noise choose to flow away to earth?
If i had been on an aeroplane, (obviously with no earth conection), then to what would i have had to connect it to get it to work?