American Radio Relay League

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• American Radio Relay League — infobox Organization name = American Radio Relay League image border = size = 100px caption = msize = mcaption = abbreviation = ARRL motto = The National Association for Amateur Radio …   Wikipedia

• American Radio Relay League — Die American Radio Relay League (ARRL) ist die nationale Vereinigung der Funkamateure in der USA, vergleichbar mit dem DARC in Deutschland. Gegründet wurde die ARRL im Mai 1914 von Hiram Percy Maxim. Momentan hat der Verein ca. 156.000 Mitglieder …   Deutsch Wikipedia

• Radio relay — Radio stations that cannot communicate directly due to distance, terrain or other difficulties sometimes use an intermediate radio relay station to relay the signals. Examples include airborne radio relay, microwave radio relay, and… …   Wikipedia

• Relay league — A relay league is a chain of message forwarding stations in a system of optical telegraphs, radio telegraph stations, or riding couriers.An interesting description of these early 19th century methods and its evolution into the electrical… …   Wikipedia

• Radio propagation — is a term used to explain how radio waves behave when they are transmitted, or are propagated from one point on the Earth to another. [ H. P. Westman et al, (ed), Reference Data for Radio Engineers, Fifth Edition , 1968, Howard W. Sams and Co.,… …   Wikipedia

• Radio Amateur Civil Emergency Service — infobox Organization name = Radio Amateur Civil Emergency Service image border = size = 169px caption = msize = mcaption = abbreviation = RACES motto = Emergency Communications Through Radio Amateur Operators formation = 1952 extinction = type =… …   Wikipedia

• Radio-amateur — Radioamateur Pour les articles homonymes, voir Radio. Le shack ou station d un opérateur radioamateur …   Wikipédia en Français

• Radio-amateurisme — Radioamateur Pour les articles homonymes, voir Radio. Le shack ou station d un opérateur radioamateur …   Wikipédia en Français

• Radio amateur — Radioamateur Pour les articles homonymes, voir Radio. Le shack ou station d un opérateur radioamateur …   Wikipédia en Français

• Radio Society of Great Britain — infobox Organization name = Radio Society of Great Britain image border = size = 63px caption = msize = 200px mcaption = Lambda House, the RSGB headquarters in Potters Bar prior to their move to Bedford in April 2008 abbreviation = RSGB motto =… …   Wikipedia

• Radio propagation beacon — A radio propagation beacon is a radio beacon, whose purpose is the investigation of the propagation of radio signals. Most radio propagation beacons use amateur radio frequencies. They can be found on HF, VHF, UHF, and microwave frequencies.… …   Wikipedia