The Radio
When new inventions arrive, we forget about the old ones. Same has happened in case of Radio Technology. Scientists were attempting to send messages over distances without wires. They were exploring the possibility of using electromagnetic waves in order to communicate between two fixed points.
There is no single inventor of radio, it came from several international developments. The explorers of radio studied work of a British physicist James Clerk Maxwell, who published his theory of electromagnetic waves in 1873. German physicist Heinrich Rudolf Hertz first generated such waves electrically although the waves he had come up with were unable to travel large distances.
Italian electrician and inventor Guglielmo Marconi succeeded in developing both a suitable receiver and an improved spark oscillator, which was connected to an effective antenna to transmit radio waves over significant distances.
In 1896, Marconi transmitted signals for a distance greater than 1.6 km. Within a year of his first demonstration, he transmitted signals from shore to a ship at sea 29 km away. In 1901, he succeeded in sending a simple message across the Atlantic. This was wireless transmission of signals rather than wireless transmission of sound.
On Christmas Eve in 1906, an American, Reginald Fessenden, managed to transmit speech and music over several hundred miles out to sea. Over the next few years, other demonstrations followed in the United States, Britain, and Europe. The combination of continuous signals being sent out from transmitters and more sensitive receivers’ aid the technical basis for wider scale listening.
The first significant users of radio coastal, marine, army, and intelligence services were, however, content with this approach, both British and Germans were using radio to communicate to naval forces from the outset, and governments were commandeering all wireless stations, seemed to entrench this pattern. World War I also motivated technical research. In the interwar years, cinema and popular newspapers were already providing larger numbers of people with entertainment and information on a national scale. Individuals were being conceived in large numbers and this meant mass markets for all sorts of consumer goods.
On a standard radio, there are two bands you can switch to AM and FM. FM stands for frequency modulation, and AM stands for, amplitude modulation. The difference between the two bands is the way they are broadcasted. AM is being amplitude modulation the pitch of the radio waves are based on the amplitude of the wave. So, for example, if the amplitude is the higher, the pitch will be the higher. As for FM, as the waves aren’t based on the amplitude, they are based on the frequency of the waves. So, the more frequent the waves are, the higher the pitch of the sound will be.
A radio works by using an antenna, which intercepts part of the radio waves. A signal voltage across the coil induces a voltage in the coil, the frequency (AM, FM) is then chosen by the variable capacitor. The capacitor in the circuit is only tuned for AM. Then the frequency comes out of the capacitor and into the transistor, which you use to tune your radio to a station on that frequency.
In Goa we have various radio stations, some of the well known are 92.7 BIG FM,ALL INDIA RADIO.
92.7 Big FM is a national private FM radio station in India. It broadcasts primarily at 92.7 MHz from 58 stations across the country, reaching a potential audience of 450 million. It broadcasts a 24-hour schedule.
All India Radio (AIR), officially known since 1957 as Akashvani (“Voice from the Sky”), is the national public radio broadcaster of India and is a division of Prasar Bharti. It was established in 1936.[2] . Headquartered in the Akashvani Bhavan building in New Delhi, it houses the Drama Section, the FM Section, the National Service.
All India Radio is the largest radio network in the world, and one of the largest broadcasting organizations in the world in terms of the number of languages broadcast and the spectrum of socio-economic and cultural diversity it serves. AIR’s home service comprises 420 stations located across the country, reaching nearly 92% of the country’s area and 99.19% of the total population. AIR originates programming in 23 languages and 179 dialects.
I have been selected as the “BIG JUNIOR RADIO JOCKEY GOA” for 92.7 Big FM .
I have hosted shows with some of the prominent Radio Jockeys at 92.7 Big FM Goa.
I have also been a part of the Drama Section radio show broadcasted on ALL INDIA RADIO such as character of Bhumi in the Science drama named “ATOM AND THE UNIVERSE”
