amateur radio 101

The Basic parts of a Radio

There are some basic parts to the radio that will be helpful to know:

  1. The Microphone
  2. The Transmitter and/or modulator
  3. The Reciever and/or demodulator
  4. The Speaker
  5. A Transceiver is a coverall name for a piece of equipment that does all of the above
  6. Further study material


     The Microphone is the part of the radio you speak into. This can typically be a desktop mic or a handheld mic or just an alotted area on the front of the handheld radio. The mircophone takes in your voice and using a membrane converts it to electronic pulses. These pulses are then sent to the transmitter. for more information try this link: Microphone

microphone on cord that you hold in your hand base station microphone with stand


     The Tranmitter is the part of the Radio system that takes input from the mircophone and adds it to a carrier wave through modulation (i.e. changing some property of the carrier wave in such a manner as to send information)and sends it to the antenna for more specifics please look here: TransmitterModulation


     The Reciever takes the signal from the antenna and seperates the signal or information (i.e. the modulation) from the carrier wave and then sends it to a speaker for more try here: Reciever   Demodulation


     A speaker is simply a piece of equipment that takes an electric signal and converts it into sound. this is typically done using some sort of membrane that is electrically charged. Speaker


      The Transceiver combines the functionality of the Transmitter and the Reciever into one piece of equipment.

The piece of equipment shown below (a Dr635 2meter/440) shows how the 4 parts can be combined into a single unit.

mobile radio from alinco the 635

Further information can be found in the following Books: