So the Wikipedia article on envelope detector is wrong? Or do you mean that yes resistance and capacitance are needed in addition to the diode or crystal, but usually the internal resistance of the wires and the capacitative reactance of the wires is enough?
show me the wiki link you referred to please.
you just need a diode to detect the AM radio signal. You would usually have a capacitor and inductor in parallel with each other in front of the diode to be your tuned circuit but they are not part of the actual audio detection. out of the diode you get audio to go to the crystal ( high impedance ) earpiece
Oh really, then it is impossible to connect your guitar amp to a speaker with a cable without a RF modulator. This is a false statement. So I don't think it is the case that audio frequencies can not be made into electromagnetic waves. Otherwise there would be no such thing as an electric guitar because the electric guitar pickups convert the sound waves on the strings into an alternating sinusoidal wave.
no you are incorrect.
The guitar pickup DOESNT pick up the sound waves from the vibrating string. The metal string moving in the magnetic field generats a current flowing in the picup coil
try a pickup on a classical nylon stringed guitar .... you wont get anything!!!
In addition, if RF near audio frequencies did not exist, then that would mean that 60Hz AC power transmission would be impossible so you would have no power for you computer allowing you to view this web page, unless you lived within half a mile from an Edison power plant and payed an arm and a leg for electric power, which Edison doesn't care that it can only go half a mile he only cares that you are paying him an arm and a leg for electric power.
none of that makes any sense and isnt the way power transmission happens .... it has nothing to do with it being 60 Hz or any other freq as a RF signal
dietermoreno ..... I wonder how old you are ? how much schooling in basic physics and electricity you have had ?
you have quite a few misconceptions in most of your statements that show that you really havent been taught correctly ot at all, or didnt understand what you were being taught.
but stick with it in here and read and learn, it will fill in a lot of gaps in your understanding