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In Europe, 12 volt plugs and sockets are not specially regulated and do not require approvals for the CE mark. [citation needed] The male plug is sometimes used to feed power into a vehicle to recharge its battery because it usually has no regulatory circuitry between the outlet and the car battery. For instance, portable solar battery ...
Land mobile radio systems are widely used by the military. Separate bands in the radio spectrum are reserved for their use. This includes portions of the 30-50 MHz band, and the entire 100-100, 100-100.8, and 540-2400 MHz bands, plus shared use of the 170- 170 MHz band.
In so-called dry magnets, coolers are used so that no cryoliquid is needed at all or for the recondensation of the evaporated helium. Also the combination of cryocoolers with 3 He- 4 He dilution refrigerators [ 23 ] for the temperature region down to 2 mK is attractive since in this way the whole temperature range from room temperature to 2 mK ...
Digital audio radio service (DARS) is any type of digital radio program service.In the United States it is the official FCC term for digital radio services.. The most popular type of DARS in the U.S. and Canada is SDARS (Satellite Digital Audio Radio Service), used by Sirius Satellite Radio and XM Satellite Radio.
Canada tested DAB services in the L-Band, in five major cities: Toronto, Montreal, Vancouver, Windsor, and Ottawa in 1999. [61] This covered a third of the population. [61] The unique requirements for DAB receivers to work inside Canada led to slow consumer uptake due to high receiver prices and reduced availability of L-Band DAB receivers. [61]
As part of a rebrand in 2015, a new Bush Classic range was also launched consisting of vintage style DAB radios as well as fridge freezers. [27] The Classic range also led to wooden cased radios and turntables. [28] In 2024, the first Bush TVs with Freely were released. [29] Bush iD, a former branding used until 2008 for certain products
Over the next several years antenna regulations were relaxed, with antenna length increasing to 1.65 meters (5'5") and centre- or top-loading of the main radiating element permitted. On 1 September 1987 the UK added the usual 40 frequencies (26.965–27.405 MHz) used worldwide, for a total of 80 channels at 27 MHz; antenna regulations were ...
This and the 1912 RMS Titanic rescue brought the field of marine radio to public consciousness, and marine radio operators were regarded as heroes. By 1920, the US had a string of 12 coastal stations stretched along the Atlantic seaboard from Bar Harbor, Maine to Cape May, New Jersey. [2] The first marine radio transmitters used the longwave bands