How to use the radio

Tuning is the tuning button, which is the knob for you to find the channel. MW is medium wave, SW is short wave, FM is frequency modulation, and MW, SW and FM should be switched by multi-position switch or electronic switch.

If you press "MW", the radio will receive medium wave, which is spread over a long distance. For example, CCTV and surrounding radio stations can receive it, but the sound quality is not very good. FM is FM broadcasting. It's close, but the sound quality is good. It can transmit stereo signals, such as city FM, traffic station, music station and so on.

The simpl radio is called a direct detector. However, the high-frequency radio signals obtained from the receiving antenna are generally weak and should not be sent directly to the detector. It is better to insert a high-frequency amplifier between the selection circuit and the detector to amplify the high-frequency signal. Even if a high-frequency amplifier is added, the detected output power is usually only a few milliwatts. It's ok to listen with headphones, but the speaker is too small. Therefore, an audio amplifier is added after the detected output to drive the speaker.