Talk:Wireless telegraphy

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Comments[edit]

what are the effects of telegraphy on society???

Hertz was not early 1800s: should this be someone else, or is it just a too-loose use of 'early', i.e. Hertz was earlier than Tesla?


Most webpages I found about Lindsay were just proud claims made for a local man without any support. The one I added tends to debunk Lindsay's electric light work as likely repeating dead-end efforts others made 25 years earlier, and has references. Yes, a wire glows when you pass a lot of amperage through it . Volta demonstrated that around 1800. If you crank up the amperage to get a bright light, it burns out in a few minutes. I have not yet found a webpage which does a careful analysis of his wireless work, but at this point it sounds like a case of boosterism which needs some supporting documentation. This is not to say he was not exceptionally intelligent and creative to have been experimenting with electricity at all in the 1830's.Edison 05:47, 24 June 2006 (UTC)

This page "An Introduction to the Mysteries of Ground Radio" by Gerry Vassilatos http://www.borderlands.com/newstuff/research/ground-myst.htm has alot of people that should be included here. I don't care about the mystic or occultic knowledge it mentions, but the people are real and their activities are true. BTW, somneone might want to put the Beverage patent @ that page in Beverage wikipage too. 204.56.7.1 17:29, 26 June 2006 (UTC)

This article might be better if it was recast as a subset of the Telegraphy article. The subject of this article is mainly the early technologies of radio telegraphy, not the its applications or modern history, for example. Albany45 15:12, 14 February 2007 (UTC)

Remove expert needed banner?[edit]

Being knowledgeable in the subject, I plan to remove the 'expert needed' banner. I think the article is better than a start article and would invite anyone to provide criticism of why it is deficient or suggestions on what is expected of this article. In my opinion, signaling through dirt and signaling through water were not mainstream topics of wireless telegraphy, they were almost irrelevant to wireless telegraphy. The mainstream was electromagnetic wave signaling, the birth of radio, and with it, the birth of electronics. It is not clear we can get into that very deeply because it is so well covered in other articles. Maybe some expect too much of this subject? Comments? John (talk) 04:58, 15 December 2007 (UTC)

Ferdinand Braun[edit]

Spider90us (talk) 00:48, 22 February 2008 (UTC)Shouldn't anyone mention anything about Braun's contribution to wireless telegraphy

I agree that Karl Ferdinand Braun's invention of the "cat's whisker" point contact diode was very important in the early progress of wireless telegraphy, and even worked as a detector for early voice transmission. The Wikipedia article has some references you might use to add an appropriate mention of Braun in this article. Fortunately, Wikipedia is the "encyclopedia anyone can edit," so feel free to add something about Braun. Edison (talk) 00:56, 22 February 2008 (UTC)

The last sentences in the section on Calzecchi-Onesti are not grammatically correct and don't make sense. AKsoldat 24 March 2011 — Preceding unsigned comment added by Aksoldat (talkcontribs) 16:47, 24 March 2011 (UTC)

Copy-editing needed[edit]

Wow, right now, this is a dog's breakfast. Little organization, disjointed chronology, stuff that doesn't make sense.

E.g., "He also proposed that intelligence — transmitted without wires — transmission through the Earth and to establish the physical mechanism of such a circuit": WTF???

I did some copy-editing, but I didn't know enough about the subject to "be bold."

Somebody who both (1) writes grammatical English and (2) knows something about electricity and its application to wireless telegraphy is desperately needed.VaneWimsey (talk) 07:15, 4 September 2012 (UTC)

Period 1838-1897[edit]

The lead paragraph makes two questionable assertions.

Wireless telegraphy dates as far back as Faraday in the early 19th century, when it was discovered that radio waves could be used to send telegraph messages.

Radio waves weren't discovered until long after Faraday died. Michael Faraday and Joseph Henry discovered magnetic induction around the same time (1831). The use of magnetic induction to send telegraph messages wasn't demonstrated until the 1880s.

After James Clerk Maxwell had predicted the existence of electromagnetic waves, and had shown that their speed of propagation is identical with that of light, it required, in reality, very little to demonstrate by experiment the existence of such waves.

This is way off. A number of prominent investigators spent years trying to prove Maxwell's theory. Helmholtz challenged Hertz to come up with the proof, but at first Hertz could not think of any experiments. It was only after Hertz noticed he was able to produce effects that could not be explained by magnetic induction that he suspected he was dealing with radiating electromagnetic waves. Hertz was working with very primitive technology and proving Maxwell's theory required very clever and careful work. He had to show that it wasn't already known effects such as magnetic induction, and then he had to show quite clearly the wave nature of the phenomenon. Claudeb (talk) 20:33, 28 August 2013 (UTC)

Trimmed back Tesla[edit]

This article contained a very WP:UNDUE section on Tesla that was mostly original research being primary sourced, including primary sourced images with no explanation. There is also a bit of a WP:POVPUSH going on with the insertion of the word "radio" many times in the section, Tesla did not agree that radio waves (Hertzian waves) were present so he would not be describing "radio". The Tesla Effect (Spark Gap Transmitter).png design drawing is not "Nikola Tesla's Spark-gap transmitter", its the authors demo of the the "Tesla Effect". Trimmed back to what can be referenced per the topic, Tesla's involvement in Wireless telegraphy. Fountains of Bryn Mawr (talk) 19:48, 26 November 2013 (UTC)

Actually most of this article is a duplicate of Invention of radio/History of radio and so goes off topic re: Wireless telegraphy, which took many forms besides radio. The Invention of radio/History of radio stuff should be trimmed way back. Fountains of Bryn Mawr (talk) 21:56, 3 September 2014 (UTC)

Off-Topic ---> too much Radio[edit]

Restating above, I propose trimming way back the Invention of radio/History of radio stuff. It just duplicates those articles and it is off topic, there were many types of "Wireless telegraphy" systems historically - one of them (radio based) was the most successful. Tesla's system would not even come under radio, it was a wholly different conduction system, but is a very on topic mention for this article. The section on "Electromagnetic wave (radio)" is wrong right off the bat re:"Wireless telegraphy dates as far back as Faraday". A large portion of these people were conducting science and then radio wave science: they were not developing or had little or no interest in Wireless telegraphy. It would help if more past or current non-radio "wireless telegraphy" systems could be mentioned in this article because an article that is just radio by another name should be deleted and redirected. Fountains of Bryn Mawr (talk) 19:47, 5 April 2015 (UTC)

I agree. I was just about to make pretty much the same comment on this page when I noticed your entry. I think the radio stuff should be limited to descriptions of how Morse code is transmitted and received, and the redundant history of the invention of radio replaced by a link to one of the many articles that already cover this; Radio, History of radio, Invention of radio. --ChetvornoTALK 19:21, 5 August 2015 (UTC)