NMSAT :: Networked Music & SoundArt Timeline

1915 __ Amateur radio
Harold H. Beverage (1893-1993)
Comment : This is in this context that the early experimenters interested in amateur radio ventured. But at that time their activity was not oriented to personal communications with other stations, or very few. In fact these "amateurs" concentrated on technical development, either in the interest of pure science through universities or personal interests, or more often, for the simple curiosity to share the first steps of this new "high tech" medium. But not everybody could experiment this new technology. Everybody didn't go to school yet and learnt to read, and thus very few people were able to understood how these systems worked. Most experimenters were thus pioneer stations. Among them name Harold H. Beverage, the famous inventor of the (very long) longwire of the same name (Beverage Antenna) that we see here at left operating his amateur radio station in 1915, probably at the University of Maine. Harold H. Beverage, alias "BEV" at work, probably in his ham shack at University of Maine, in 1915. After the publishing of various designs for wireless equipment in magazines, many experimenters built their own radio transmitter and receiver. The modest installation emitted at short distances, a few tens of kilometers, and were not disturbed by interference yet, contrarily to their professional colleagues. At that time, where radio communications were not regulated yet, we estimate the number of "major" amateur stations capable of communicating over 15 km at 600, while "minor" stations emitting in a 1-3 km range probably to about 3000, maybe more. In parallel, by 1910 they were 488 merchant vessels and yachts active on wireless in the USA, some tens in european countries, and a handful in Russia, Brazil and Cuba. These people worked on 300-600 meters (1000-500 Kc) with a power ranging from 350 watts (most) to 2 kW using a relatively small Marconi antenna. Due to the spark gap their emissions were broadband and these professionals created already at that time much, much QRM. (Thierry Lombry, “The History of Amateur Radio”)
Urls : http://www.astrosurf.com/luxorion/qsl-ham-history3.htm (last visited )

No comment for this page

Leave a comment