How does the inductor and tuning capacitor together work in the AM Radio Reciever?How does it pick up the frequency I want? What is the principle behind it?
It makes a tuning circuit. Basically its a filter which you tune to let through a certain frequency. The inductor is fixed and the capacitor is variable, so moving the vanes on the capacitor changes the tuned frequency and as you move it the filter frequency changes and lets each frequency through in turn until you find the one you want.
One triode tube could be related to type a RF detector . Then build it as an common AM receiver that in the time of uncomplicated terms could be utilized interior 5 miles from AM station. This circuit demands to apply extreme impedance 10K ohms head set which isn't able to acquire nowaday. FM band radio on no account could be outfitted with one triode even 2.
Basically the inductor is a coil. When connected to a battery or some other power source in parallel it discharges, or shorts. On the other hand a capacitor stores electricity. In a tuning circuit, these two are connected parallel. So you can imagine the outcome. when power is supplied, capacitor stores the electricity while the stored electricity quickly gets discharged via the inductor. again the same process. This process happens again and again and the outcome is a signal of a fixed frequency. This frequency depends on the capacitor value and the inductance. So the frequency can be varied when one or both of these are varied. Thats where the tuning capacitor comes in. Hence now we can make a variable frequency. In the radio, the antena absorbs all signals from the space that it can absorb, so various frequencies are absorbed. We get a signal with all frequencies in it. Then a selected frequency is absorbed to a transistor. This selected frequency depends on the frequency I explained at first. After going through the transistor we get the desired radio frequency which we listen through the earphones. Hence by varieng the frequency I described first you get different chanels.
