rotatable beam antenna

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• HRS antenna — HRS type antennas are more or less the standard antenna used for long distance high power shortwave broadcasting (> 1000 km). Contents 1 History of HRS design 2 Nomenclature 3 A versatile antenna type …   Wikipedia

• HRS type antennas — are more or less the standard antenna used for long distance high power shortwave broadcasting (> 1000 km). History of HRS design HRS antennas were discovered during the 1920s, and as such were not originally intended for voice and music… …   Wikipedia

• MESSENGER — This article is about the NASA space mission. For other uses, see Messenger. MESSENGER Artist s rendering of MESSENGER orbiting Mercury. Operator NASA / APL Major contractors APL …   Wikipedia

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• Direction finding — (DF) refers to the establishment of the direction from which a received signal was transmitted. This can refer to radio or other forms of wireless communication. By combining the direction information from two or more suitably spaced receivers… …   Wikipedia

• New Horizons — For other uses, see New Horizons (disambiguation). New Horizons Operator NASA Major contractors Applied Physics Laboratory (APL) Southwest Research Institute (SwRI) …   Wikipedia

• Radio Netherlands Worldwide — (RNW, short for Radio Nederland Wereldomroep in Dutch) is a public radio and television network based in Hilversum, producing and transmitting programmes for international audiences outside the Netherlands. Radio Netherlands Worldwide has also… …   Wikipedia

• Shortwave — 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… …   Wikipedia

• Shortwave 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… …   Wikipedia

• T-34 variants — Infobox Weapon name= T 34 variants caption= T 34 family portrait, 1941 (BT 8, A 20, T 34 Models 1940 and 1941) origin= Soviet Union type= Medium tank is vehicle= yes is UK= yes service= 1940–96 production date= 1940–56 number= about 84,070The T… …   Wikipedia