The above picture shows the basic stages of the commercial transmitter, its blocks/stages and how they are connected with each other. I would like to describe each of these block independently so it could help the beginners see the big picture and thus better understand how transmitters are designed. So lets start! The information that you are about to read is brought to us by: http://www.electronics-diy.com " Audio Source Also referred to as Audio Frequency (AF) which usually is around 20Hz-20KHz. This can be either CD player, computer, tape, microphone or just about a...