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This sentence is is completely wrong. "More important for the future, the coherer could not detect AM (radio) transmissions".
It is true that the coherer was originally used to simply ring a bell in the presence of RF Energy. However experimenters soon learnt that the basic Coherer could also be used as a Detector when placed in series with headphones.
Marconi's notes on his original Transatlantic transmission showed that his simple un-tuned receiver consisted of a long-wire held aloft by a kite, with a Marconi Coherer in series with a earpiece.
With this he could hear the AM Spark transmissions from England. (incredibly the same paragraph even mentions this!)
And it's important to note that the first Coherer (along with other Detectors) was developed by David Edward Hughes. see /info/en/?search=David_Edward_Hughes.
This was long before Branly and Lodge.
Gutta Percha ( talk) 13:16, 27 August 2019 (UTC)
Today's version of this does not explain how the decoherer works to enable the coherer to distinguish a dot from a dash. (Note the coherer latches up at the beginning of both.) John ( talk) 16:44, 26 February 2010 (UTC)
"The metal balls will cling together, or cohere..." What? How does that make any sense? How do metal balls or filings CLING together under the presence of Electromagnetic Fields or even short bursts? I think this needs more elaboration, perhaps a major edit/revision. BuildersHutGames ( talk) 01:35, 31 October 2023 (UTC)
![]() | This article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||
|
This sentence is is completely wrong. "More important for the future, the coherer could not detect AM (radio) transmissions".
It is true that the coherer was originally used to simply ring a bell in the presence of RF Energy. However experimenters soon learnt that the basic Coherer could also be used as a Detector when placed in series with headphones.
Marconi's notes on his original Transatlantic transmission showed that his simple un-tuned receiver consisted of a long-wire held aloft by a kite, with a Marconi Coherer in series with a earpiece.
With this he could hear the AM Spark transmissions from England. (incredibly the same paragraph even mentions this!)
And it's important to note that the first Coherer (along with other Detectors) was developed by David Edward Hughes. see /info/en/?search=David_Edward_Hughes.
This was long before Branly and Lodge.
Gutta Percha ( talk) 13:16, 27 August 2019 (UTC)
Today's version of this does not explain how the decoherer works to enable the coherer to distinguish a dot from a dash. (Note the coherer latches up at the beginning of both.) John ( talk) 16:44, 26 February 2010 (UTC)
"The metal balls will cling together, or cohere..." What? How does that make any sense? How do metal balls or filings CLING together under the presence of Electromagnetic Fields or even short bursts? I think this needs more elaboration, perhaps a major edit/revision. BuildersHutGames ( talk) 01:35, 31 October 2023 (UTC)