Barretter (other)
Barretter may refer to: * Hot wire barretter, an early form of radio demodulator * Iron-hydrogen resistor or barretter, a hydrogen-filled glass bulb in which an iron wire is located * Liquid barretter, an alternative term for electrolytic detector See also * Baretta (other) * Bereta (other) * Beretta * Biretta The biretta ( la, biretum, birretum) is a square cap with three or four peaks or horns, sometimes surmounted by a tuft. Traditionally the three-peaked biretta is worn by Catholic clergy and some Anglican and Lutheran clergy. A four-peaked bire ...

Hot Wire Barretter
The hot-wire barretter was a demodulating detector, invented in 1902 by Reginald Fessenden, that found limited use in early radio receivers. In effect, it was a highly sensitive thermoresistor, which could demodulate amplitude-modulated signals, something that the coherer (the standard detector of the time) could not do. Tapan K. Sarkar, Robert Mailloux, Arthur A. Oliner, Magdalena Salazar-Palma, Dipak L. Sengupta, "History of Wireless", , January 2006, Wiley-IEEE Press, page 369. The first device used to demodulate amplitude modulated signals, it was later superseded by the electrolytic detector, also generally attributed to Fessenden. The barretter principle is still used as a detector for microwave radiation, similar to a bolometer. Description and construction Fessenden's 1902 patent describes the construction of the device. A fine platinum wire, about in diameter, is embedded in the middle of a silver tube having a diameter of about . This compound wire is then drawn unti ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

Electrolytic Detector
The electrolytic detector, or liquid barretter, was a type of detector (demodulator) used in early radio receivers. First used by Canadian radio researcher Reginald Fessenden in 1903, it was used until about 1913, after which it was superseded by crystal detectors and vacuum tube detectors such as the Fleming valve and Audion (triode). It was considered very sensitive and reliable compared to other detectors available at the time such as the magnetic detector and the coherer. It was one of the first rectifying detectors, able to receive AM (sound) transmissions. On December 24, 1906, US Naval ships with radio receivers equipped with Fessenden's electrolytic detectors received the first AM radio broadcast from Fessenden's Brant Rock, Massachusetts transmitter, consisting of a program of Christmas music. History Fessenden, more than any other person, is responsible for developing amplitude modulation (AM) radio transmission around 1900. While working to develop AM transmitte ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

Baretta (other)
''Baretta'' was an American detective television series that ran from 1975 to 1978. Baretta may also refer to: Places * Baretta, Punjab, or Bareta, an Indian municipality People * Baretta (surname), surname Other uses * Kramer Baretta, a guitar * USS ''Baretta'' (AN-41), a U.S. Navy ship * Baretta, members of the Rutaceae genus ''Helietta'' (flowering plants) * "Barrette" (song) by Nogizaka46, pronounced as in Japanese. See also * Barreta Island * Barretter (other) Barretter may refer to: * Hot wire barretter, an early form of radio demodulator * Iron-hydrogen resistor or barretter, a hydrogen-filled glass bulb in which an iron wire is located * Liquid barretter, an alternative term for electrolytic detector ... * Bereta (other) * Beretta (other) * Beretta (surname) {{Disambig ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

Bereta (other)
Bereta may refer to: * Joe Bereta of Barats and Bereta, American sketch comedy group * Georges Bereta, French football player See also * Baretta (other) * Barretter (other) * Beretta (other) * Biretta The biretta ( la, biretum, birretum) is a square cap with three or four peaks or horns, sometimes surmounted by a tuft. Traditionally the three-peaked biretta is worn by Catholic clergy and some Anglican and Lutheran clergy. A four-peaked bire ...

Beretta
Fabbrica d'Armi Pietro Beretta (; "Pietro Beretta Weapon Factory") is a privately held Italian firearms manufacturing company operating in several countries. Its firearms are used worldwide for a variety of civilian, law enforcement, and military purposes. Sporting arms account for three-quarters of sales; Beretta is also known for marketing shooting clothes and accessories. Founded in the 16th century, Beretta is the oldest active manufacturer of firearm components in the world. In 1526 its inaugural product was arquebus barrels; by all accounts Beretta-made barrels equipped the Venetian fleet at the Battle of Lepanto in 1571. Beretta has supplied weapons for every major European war since 1650. History Val Trompia, a northern Italian river valley in the Province of Brescia, Lombardy, has been mined for iron ore since the time of the Roman Empire. In the Middle Ages, Val Trompia was known for its ironworks; after the Renaissance it came to be a center for the manufacture ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]