radiotelegraph
41Thief River Falls, Minnesota — Infobox Settlement official name = Thief River Falls, Minnesota settlement type = City nickname = motto = imagesize = image caption = image imagesize = image caption = image mapsize = 250px map caption = Location of Thief River Falls, Minnesota… …
42Radio broadcasting — Long wave radio broadcasting station, Motala, Sweden …
43Pirate radio — For other uses, see Pirate Radio (disambiguation). Pirate radio is illegal or unregulated radio transmission. The term is most commonly used to describe illegal broadcasting for entertainment or political purposes, but is also sometimes used for… …
44RX — was the common telegraph abbreviation for receive , later used in CW. It should not be confused with Rx, used for prescriptions. It is also the IATA airline designator of Aviaexpress...ee also* TX, the common telegraph abbreviation for transmit… …
45CQ (call) — CQ is a code used by wireless operators, particularly those communicating in Morse code, but also by voice operators, to make a general call (called a CQ call ). Transmitting the letters CQ on a particular radio frequency is an invitation for any …
46Signal Corps (United States Army) — U.S. Army Signal Corps Coat of Arms Active 3 March 1863 – Present Country …
47Orcadas Base — Orcadas Antarctic Station Location map for Orcadas Base Coordinates …
48Letterfrack — Infobox Irish Place name = Letterfrack gaeilge = Leitir Fraic crest motto = map pin coords = left: 38px; top: 28px north coord = 53.55 | west coord = 9.95 | irish grid = L697591 area = | elevation = 81 m province = Connacht county = County Galway …
4910-meter band — The 10 meter band is a portion of the shortwave radio spectrum allocated to amateur radio use. The band consists of frequencies stretching from 28.000 MHz to 29.700 MHz.HistoryThe 10 meter band was created by the… …
50Aircraft registration — A Van s Aircraft RV 7 displaying registration G KELS. The G prefix denotes a civil aircraft registered in the United Kingdom An aircraft registration is a unique alphanumeric string that identifies a civil aircraft, in similar fashion to a… …
