NSS began transmitting in September, 1918 using 500 kilowatt Poulson Arc transmitters.
2.
These generated radio waves by a high voltage Poulsen arc transmitters, which were used into the 1920s.
3.
In arc transmitters up to 70 kW, the key typically shorted out a few turns in the antenna coil.
4.
In 1916 the transmitter was upgraded ( by the Navy ) to a Poulsen arc transmitter and vacuum tube receiver.
5.
In 1902, the station Ushant TSF is established with a radio operator, receiver with coherer, and an arc transmitter.
6.
Sarnoff used H . J . Round's hydrogen arc transmitter to demonstrate the broadcast of music from the New York Wanamaker station.
7.
"' 1902 "'- The Poulson Arc transmitter is created converts direct current electricity into radio frequency alternating current.
8.
Soon afterwards, the Batavia announced that a huge arc transmitter station, using Telefunken arc equipment, was under installation at Malabar, near Bandoeng.
9.
Poulsen developed an arc converter in 1908, referred to as the " Poulsen Arc Transmitter ", which was widely used in radio before the advent of vacuum tube technology.
10.
By this time, however, arc transmitters were becoming obsolete, and valve or vacuum tube transmitters were soon afterwards installed at this same location on the island of Java.
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