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During World War II, Germany developed a hand-crank 500 kHz rescue radio, the "Notsender" (emergency transmitter) NS2. It used two vacuum tubes and was crystal-controlled. The radio case curved inward in the middle so that a user seated in an inflatable life boat could hold it stationary, between the thighs, while the generator handle was turned.
Voyager Pro KA600 Hand Crank Emergency Radio. This is the most advanced model from Kaito’s Voyager line, and can be used as a daily radio as well as an emergency backup. Power options include an ...
In present Freeplay radios and other products, clockwork mechanisms storing energy in a mainspring have now been replaced by small batteries charged by cheaper hand-crank generators. [9] Freeplay Energy produces a variety of consumer devices in addition to radios, including flashlights, lanterns, mobile phone chargers, and foot-powered generators.
Some emergency radios can also be powered by an attached solar panel. One element that separates some emergency radios from other types of radios, is the ability to broadcast alerts from the Emergency Alert System, even when the radio sound is turned off. This is especially useful in areas where sudden storms, tornadoes, tsunamis or other fast ...
(a) To develop the use of personal radio services as an additional source of communications for emergencies, disasters, and as an emergency aid to individuals; [1] (b) To establish 24-hour volunteer monitoring of emergency calls, particularly over officially designated emergency frequencies, from personal radio service operators, and report such calls to appropriate emergency authorities; [1]
Oscilloscope OL-1 from 1954, the company's first with a relatively small 3-inch CRT which allowed for a highly competitive price of US$ 29.50 (equivalent to $345 in 2024) for the DIY kit. [1] Heathkit is the brand name of kits and other electronic products produced and marketed by the Heath Company.
Other ways of achieving the same function are clockwork radio, hand crank radio and solar radio, especially for the Royal Flying Doctor Service and School of the Air. [5] [citation needed] As part of an energy harvesting electronics system, some batteryless radios render electricity to storage by means of storage capacitors.
Crank powered flashlights often have radios and other features. One popular feature is a 5-volt USB charging port for recharging cell phones when an outlet is not available. The quality and long-term reliability of these devices vary over a wide range, from high-reliability mil-spec emergency equipment down to one-time-use non-repairable ...
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