The Radio and how it works

by Forrest Keel

Radio is a form of communication in which intelligence is transmitted without wires from one point to another by means of electromagnetic waves. Early forms of communication over great distances were the telephone and the telegraph. They required wires between the sender and receiver. Radio, on the other hand, requires no such physical connection. It relies on the radiation of energy from a transmitting antenna in the form of radio waves. These radio waves, traveling at the speed of light (300,000 km/sec; 186,000 mi/sec), carry the information. When the waves arrive at a receiving antenna, a small electrical voltage is produced. After this voltage has been suitably amplified, the original information contained in the radio waves is retrieved and presented in an understandable form. This form may be sound from a loudspeaker, a picture on a television, or a printed page from a teletype machine. In this book we will talk about the history of the radio, operations and components.

10 pages, Kindle Edition

Published September 17, 2016

Reviews

[Carol Brown · Rating 5 out of 5]

Simple yet informative

Loved this. I am a ham radio operator but my brain has a hard time grasping the theory. Unlike my husband who was a tech for about 50 years. This was a simple and informative explanation of the hobby that I love and that fascinates me.