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In a direct-drive turntable the motor is located directly under the center of the platter and is connected to the platter directly. It is a significant advancement over older belt-drive turntables for turntablism, since they have a slower start-up time and torque, and are prone to wear-and-tear and breakage, [5] as the belt would break from backspinning or scratching. [6]
Microwave signals are normally limited to the line of sight, so long-distance transmission using these signals requires a series of repeaters forming a microwave relay network. It is possible to use microwave signals in over-the-horizon communications using tropospheric scatter , but such systems are expensive and generally used only in ...
Turntablism as it is known today, however, did not surface until the advent of hip hop in the 1970s. Examples of turntable effects can also be found on popular records produced in the 1960s and 1970s. This was most prominent in Jamaican dub music of the 1960s, [6] among deejays in the Jamaican sound system culture.
A microwave oven does not pose this problem. Food and cookware taken out of a microwave oven are rarely much hotter than 100 °C (212 °F). Cookware used in a microwave oven is often much cooler than the food because the cookware is transparent to microwaves; the microwaves heat the food directly and the cookware is indirectly heated by the food.
Microwaves are non-ionizing radiation, which means that microwave photons do not contain sufficient energy to ionize molecules or break chemical bonds, or cause DNA damage, as ionizing radiation such as x-rays or ultraviolet can. [25] The word "radiation" refers to energy radiating from a source and not to radioactivity. The main effect of ...
Railway turntable, a device used at some railroad facilities to turn locomotives or other rolling stock around Car turntable , a motorized or manual device, usually installed in a driveway or on a garage floor, that rotates a motor vehicle to facilitate an easier or safer egress of the vehicle and/or eliminate backing up
Car on turntable in Louisville, Colorado. Car on turntable in Palm Beach, Florida. A car turntable in Sudbury, Suffolk UK. Designed and made by David Le Versha. A car turntable or driveway turntable is a rotating platform designed for use by a car; they can be motorized or manually rotated and are usually installed in a driveway or in a garage ...
The output from a DJ mixer is typically plugged into a sound reinforcement system or a PA system at a dance, rave, nightclub or similar venue or event. The sound reinforcement system consists of power amplifiers which amplify the signal to the level that can drive speaker enclosures, which since the 1980s typically include both full-range speakers and subwoofers for the deep bass sounds.