Showing posts from February, 2020

Importance of Listening Radio

Radio  waves were first recognized b y German physicist Heinrich Hertz in 1886. The first hands-on  radio  transmitters were developed about 1895-6 by Italian Guglielmo Marconi, and  radio  inaugurated to be recycled commercially around 1900. What was the radio first used for? In the 1920s,  radio was first used to conduct pictures visible as television.  In early 1930s, Sngle Sideband (SSB) and frequency modulation (FM) existed invented by inexpert  radio  operators. By 1940, they were well-known commercial modes. What are the types of Radio? 1: One way Radio: It is very simple radio. It receives communications form the control center. Example: Race tracks.                              2: Two way Radio: It transmit and receives the signals simultaneously. 3: Fixed Mount Radio:   It is an unusual device with a receiver and an internal multi-channel antenna. 4: Portable Radio:  This radio can be easily installed and move from one p