The three American Physicist, John Bardeen, William Shockley, and Walter Brattain invented the transistor in 1947 when India got the independence. Since then this modern electronic device has modified into various new devices. For instance, after the innovation of transistor, CD walkman and CD players were invented. And with the passage of time these music players have seen lots of development in their quality of sound and the network connection on which they works.
Transistors works on transmission of signals by modulation of electromagnetic waves that are being provided by radio transmitted stations. All India Radio is one such example that provides this service in India through their different channels such as, Frequency Modulation (FM), and Amplitude Modulation (AM). As close as you get to the radio transmitter, as clear you would catch the signals. These radio and transistors have antenna on it that catches the signal. But, after the launch of walkman, transistors became outdated players.
Today, we have thousand of Multinational Corporations who are manufacturing top class walkman and CD players. But still, the trend of radio has not yet changed as still in our automobiles and home we usually depend on the radio for entertainment. Walkman needs cassette and CD's to play music, but transistor doesn't need any such thing.
Radio is an offshoot of Information and broadcasting services. Radio and transistor is not only an object of entertainment but also it provides information and news of what all is happening around the world. On internet you can search international radio channels.
Sony, Panasonic, and Phillips, etc., are a few names but there are thousands of companies that are in business of walkman and music player manufacturing. In the leisure time, plugging Headphones and listening music is one favorite pass time. If you want to know more about radio or walkman, as how exactly it works and what all key point one should consider while buying a new transistor, there is a lot of information is available on internet.
If you are interested to sell or purchase online product, then also there are a lots of online classified websites are available on internet. http://www.freeads.in is one such online classified websites, which deals in sell and purchase of second hand products. So, if you want to buy a used transistor or walkman or if you have any used walkman which you want to sell www.freeads.in is one best platform that connects the seller and buyer in a hassle free way!
