Telephone dating radio
Accounts of flags, mirrors and smoke signals appear in early history. By 1837 the system is improved and was demonstrated using 'lightning wires' and 'Morse code,' an electronic alphabet that could carry messages. A line was constructed between Baltimore and Washington and the first message, sent on May 24,1844, was 'What hath God wrought!
Greek runner Pheidippides, Athenian courier is sent to Sparta to request help when the Persians landed at Marathon - runs 150 miles in two days. Early discoveries of Electricty and Magnetism can be found in the annals of history, names such as Gilbert, Von Guericke, Volta, Oersted, Wheatstone, Cooke, Faraday, Ampere, Ohm, Davy, all contribute to the ultimate development of wireless. Early Pioneers and Inventors include, Maxwell, Marconi, Loomis, Edison, Henry, Hertz, Feddersen, Von Bezold, Hughes, Stokes, Tesla, Henry, Bell, Preece, Hertz, Branly, Dodge, Braun, Lodge, and Popoff all lay the foundation of wireless Samuel F. ' the two coasts of the United States were linked by telegraph.
The Leece-Neville "flux-cutter" alternator was marketed at the end of the war as a solution to the issue, allowing high current output even at idle.
In 1934, the American Bosch company supplied extra large generators to deal with this extra load.
In the Iliad, Homer tells of a chain of beacon fires prearranged to signal the return of Agamemnon's fleet to Mycenae and, thus, gave Clytemnestra and Aegisthus time to arrange the assassination of Agamemnon.
Persian Army employs a relay system where soldiers positioned on hilltops shout and relay military messages 30 times faster than by runner.
Raycraft, Nevada's "Father of Wireless" ~ ~ Amateur Wireless Operation in Nevada ~ ~ America's First Radio Tour ~ ~ Nevada's Earliest Radio Broadcast Stations ~ was a 1922 promotional trek to expose the rural West to the possibilities of RADIO. All non-credited photos and all text on this webpage are property of Henry Rogers/Western Historic Radio Museum and are subject to copyright laws. Mackay is best known in Nevada as one of the "Big Four" of the Comstock, the mining district located in Virginia City, Nevada.
The tour began in Detroit and finished in Los Angeles, however the participants were particularly impressed with Nevada and spent three days in Austin, Nevada. Written permission (e-mail) is required for the use of any of our photos or any of our text on any other websites or for any other purpose. Mackay was an immigrant youth that worked his way west and then came to Virginia City in 1859.
There is a link provided to the 1909 ME Wireless Contest article (from Google Books) in the "M. The slider uses a spring-loaded ball contact against the windings.The single earphone headset is from the Kellogg Company and Dodd has this headset on in the 1909 photo.Also visible in the 1909 photo is a bias adjusting resistance, probably for an Electrolytic detector, a detector switch, an air inductor, a telephone microphone and another earphone. The transmitter uses two spark coils, a homemade condenser made from glass photo plates and a homemade helix.Inevitably, there will be "holes" in data coverage in any project like this, and I do not have enough information, manuals or examples of equipment to make this page an absolutely complete reference.For example, I do not have photos or detailed descriptions of the motorcycle and mobile equipment made by GE prior to 1940, other than that below, so while mentioned here, it is not covered in any detail.
