 A Baygen clockwork radio with crank in winding position Radio receivers were originally operated by battery. The term batteryless radio was initially used for the radio receivers which could be used directly by AC mains supply. It was invented by Edward S. Rogers, Sr. on April 8, 1925 in Canada who made world history when he and his two chief engineers built the world’s first all-electric radio. The unit operated with 5 Rogers AC Vacuum tube and the Rogers Battery-Eliminator Power Unit (power supply). This unit later becomes marketed for $120 [1] as "Type 120". Batteryless Radio were not introduced in the United States until May, 1926 and then in Europe in 1927.[2] This does not cite its references or sources. ...
Edward S. “Ted†Rogers, Sr. ...
In electronics, a vacuum tube or (outside North America) thermionic valve or just valve, is a device generally used to amplify, switch or otherwise modify, a signal by controlling the movement of electrons in an evacuated space. ...
World map showing Europe A satellite composite image of Europe Europe is one of the seven traditional continents of the Earth. ...
Crystal radio receivers are a very simple kind of batteryless radio receiver. They do not need a battery or power source, except for the power that they receive from radio waves using their long outdoor wire antenna. The crystal radio receiver (also known as a crystal set) was first built circa 1900 by Greenleaf Whittier Pickard, who used crystalline minerals to detect radio signals. ...
A Yagi-Uda beam antenna Short Wave Curtain Antenna (Moosbrunn, Austria) A building rooftop supporting numerous dish and sectored mobile telecommunications antennas (Doncaster, Victoria, Australia) An antenna or aerial is an arrangement of aerial electrical conductors designed to transmit or receive radio waves which is a class of electromagnetic waves. ...
Thermoelectricity was widely used in the remote parts of the Soviet Union from the 1920s to power radios. The equipment comprised some bi-metal rods, one end of which could be inserted into the fireplace to get hot with the other end left out in the cold. The 1920s was a decade sometimes referred to as the Jazz Age or the Roaring Twenties, usually applied to America. ...
thermocouple and Peltier_Seebeck effect. ...
Kerosene radio made in Moscow for use in rural areas, this all-wave radio is powered by the kerosene lamp hanging above it. A group of thermocouples is heated internally to 570 degrees by the flame. Fins cool the outside to about 90 degrees. The temperature differential generates enough current to operate the low-drain reciever.[3] Location Position of Moscow in Europe Government Country District Subdivision Russia Central Federal District Federal City Mayor Yuriy Luzhkov Geographical characteristics Area - City 1,081 km² Population - City (2005) - Density 10,415,400 8537. ...
It has been suggested that RP-1 be merged into this article or section. ...
In electronics, thermocouples are a widely used type of temperature sensor and can also be used as a means to convert thermal potential difference into electric potential difference. ...
Foot operated radio or Pedal radio were once used in Australia. Another way of achieving the same function is Clockwork radio, hand crank radio and solar radio[4]. The Pedal Radio (or Pedal Wireless) was developed by Alfred Traeger in 1929 as a way of providing radio communications to remote homesteads in the Australian outback. ...
A clockwork radio is a radio that is powered by clockwork wind-up mechanism driving an internal generator, rather than batteries or solar cells or mains electricity or thermoelectrics. ...
See also
Thermoelectricity is the conversion from temperature differentials to electricity or vice versa. ...
The Peltier–Seebeck effect, or thermoelectric effect, is the direct conversion of heat differentials to electric voltage and vice versa. ...
The thermopower, or thermoelectric power, or Seebeck coefficient of a material is a measure of the magnitude of an induced thermoelectric voltage in response to a temperature difference across that material. ...
Joules law (also known as Joule effect) is a physical law expressing the relationship between the heat generated by the current flowing through a conductor. ...
In thermal physics, heat transfer is the passage of thermal energy from a hot to a cold object. ...
Thermoelectric cooling uses the Peltier effect to create a heat flux between the junction of two different types of materials. ...
Pyroelectricity is the electrical potential created in certain materials when they are heated. ...
Thermionic emission (archaically known as the Edison effect) is the flow of electrons from a metal or metal oxide surface, caused by thermal vibrational energy overcoming the electrostatic forces holding electrons to the surface. ...
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