Operational Amplifier Radio
Germanium diode radios generally do not perform well but they can be important for emergency communication because they need no power source. Usually, you can listen to a germanium radio only through an earphone, but we have added an operational amplifier to this project so that you can hear it through the speaker.
We are going to make an IC radio, using the dual operational amplifier as a two-power source, noninverting amplifier. This is the simplest way to use this IC.
When you complete the circuit, put up the antenna, connect it to the circuit, set the control to the central position, turn on the power.
Turn the tuning capacitor until you hear a station. To pick up weaker stations, try using the earphone in place of the speaker.