dream of radio is what will happen?
the simplest radio called direct detection machine. But high frequency radio signals from the receiving antenna is generally very weak, it's not reasonable to put it directly to the detector. The best circuit between the detector and insert a high frequency amplifier, the high frequency signal amplification.
even if the high frequency amplifier has been increased, detection of the output power is usually only a few milliwatts, listening with headphones can also, but want to use the speaker is too small, so the increase after the detector output audio amplifier to drive the speaker.
so, dream of the radio signal?
dream of is the radio broadcast, sound, be careful, you will be fooled; At work, be careful when you are jealous, and you will feel helpless.
dreamed that the radio be careful man dreamed of the radio signal
& have spent
