radiotelegraph station
11Telegraphy — (from the Greek words (τηλε) = far and (γραφειν) = write) is the long distance transmission of written messages without physical transport of letters. Radiotelegraphy or wireless telegraphy transmits messages using radio. Telegraphy includes… …
12radio — /ray dee oh /, n., pl. radios, adj., v., radioed, radioing. n. 1. wireless telegraphy or telephony: speeches broadcast by radio. 2. an apparatus for receiving or transmitting radio broadcasts. 3. a message transmitted by radio. adj. 4. pertaining …
13Invention of radio — Great Radio Controversy redirects here. For the album by the band Tesla, see The Great Radio Controversy. Contents 1 Physics of wireless signalling 2 Theory of electromagnetism …
14Pirate 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… …
15Guglielmo Marconi — Born 25 April 1874(1874 04 25) Palazzo Marescalchi, Bologna …
16Orcadas Base — Orcadas Antarctic Station Location map for Orcadas Base Coordinates …
17Shortwave — radio operates between the frequencies of 3,000 kHz (3.000 MHz) and 30,000 kHz (30.000 MHz) [ Tomislav Stimac, [http://www.vlf.it/frequency/bands.html Definition of frequency bands (VLF, ELF... etc.)] . IK1QFK Home Page (vlf.it).] and came to be… …
18Shortwave radio — Shortwave can also refer to a shortwave trough meteorology. A solid state, analog shortwave receiver Shortwave radio refers to the upper MF (medium frequency) and all of the HF (high frequency) portion of the radio spectrum, between… …
19Letterfrack — 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 …
20Morse code abbreviations — differ from prosigns for Morse Code in that they observe normal interletter spacing; that is, they are not run together the way prosigns are. From 1845 until well into the second half of the 20th century, commercial telegraphic code books were… …
