When the radio wave turned on the coherer, the DC current from the battery flowed through the electromagnet, pulling the arm over to give the coherer a tap.
42.
When the radio wave turned on the coherer, the DC current from the battery flowed through the electromagnet, pulling the arm over to give the coherer a tap.
43.
On May 7, 1895 he presented a paper on a wireless lightning detector he had built that worked via using a coherer to detect radio noise from lightning strikes.
44.
The carbon rod and two carbon blocks, which he would refer to as a " coherer " in 1899 is also similar to devices known as crystal radio detectors.
45.
On this day, Popov performed a public demonstration of transmission and reception of radio waves used for communication at the Russian Physical and Chemical Society, using his coherer.
46.
During his transatlantic radio communication experiments in December 1902 Marconi found the coherer to be too unreliable and insensitive for detecting the very weak radio signals from long distance transmissions.
47.
Marconi's 1896 coherer receiver, at the Oxford Museum of the History of Science, UK . The coherer is on right, with the decoherer mechanism behind it.
48.
Marconi's 1896 coherer receiver, at the Oxford Museum of the History of Science, UK . The coherer is on right, with the decoherer mechanism behind it.
49.
The coherer used in practical receivers was a glass tube, sometimes evacuated, which was about half filled with sharply cut metal filings, often part silver and part nickel.
50.
As late as 1955, a Japanese radio-controlled toy bus used a spark transmitter and coherer receiver; the spark was visible behind a sheet of blue transparent plastic.
