technology+timeline

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 On December 12, 1901 Marconi was putting up the first wireless transmitter. This transmitter was a 152.4 meter ( 500ft) and it was able to transmit 3,500 kilometers (2,200 mi) from St. Johns to Newfoundland. When Marconi first put the signal up people were very skeptical because the signal was very faint and they found it very hard to distinguish form the atmospheric noise. Marconi was feeling challenged so he decided to set up another test run in February,1902 from Great Britain the signals came from the Poldhu station. It produced signal up to 2,496 Kilometers (1,551 miles) and the audio reception up to 3,378 kilometers (2,099miles) it was the maximum distance that night. What he came up with is that radio signals travel much farther during the night. 



Valdemar Poulsen is an engineer who invented an arc converter as a generator to have a continues wave as radio signals in 1902. In the beginning of 1904 Poulsen used the arc for and experimental radio transmission receiving sites in Denmark and Great Britain. Poulsen invention of the arc transmitter was built upon the work of the English Engineer William Duddell. Duddell concluded that it was impossible to make the arcs signals at radio frequencies but in 1902 Poulsen succeeded in doing the by modifying the electrodes then placing the arc in pure hydrogen and then adding a transverse magnetic field.



n 1946 the first electronic numerical integrator and computer was made. It was the first Turning complete digital computer. It boasted speeds one thousand times faster than the electro machines. It took 15 years to complete rather than the 3 year plan. This was the first largest computer ever made back in the 1940’s.

In the 1960’s William P. Lear invented the eight track player. His eight track player had good audio and was easily adaptable to the home and the car. Lear’s eight track player had doubled the amount of music and was able to record a single tape cartridge. By the invention of the eight track player lear made an early mark for the car radio.

The first commercial lunch of the cellular telecoms was launched in Tokyo Japan in 1979. The system was launched in Denmark, Finland, Norway and Sweden. The first hand held cellular phone was launched in the US in 1983.

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