Bang Olufsen Beogram 8000 Linear Tracking Turntable

Bang Olufsen Beogram 8000 Linear Tracking Turntable. Microprocessor controlled. Tangential Platter Drive - a form of direct drive that uses a "linear motor" technology to give smooth, silent and controllable power to the turntable. In simple terms, the motor coils placed a magnetic field at a tangent to a metal drum under the platter. This had the effect of pulling the drum through the coils in a manner that was smooth and free of cogging and stepping effects. By sensing the rotating speed of the platter with an encoding ring fitted to the turntable shaft, the microcomputer could be included in a closed loop system, permanently ensuring perfect speed accuracy utilizing the precision of the microcomputers quartz crystal. Electronic Speed control in 0.05 rpm steps. To slow the platter, an electronic brake was fitted that used the driving coils to bring the platter to a swift halt. The braking force was applied progressively to give smooth results and the overall effect was similar to that observed when a conventional belt-drive turntable is switched off. The microprocessor controls the tonearm, and eliminate end of album drift. The delicate MMC 20 CL Cartridge was handled by the a moving coil actuator (like a miniature loudspeaker) that could be accurately positioned and moved under microprocessor control. Using this, the force with which the stylus came into contact with the record was set by programming, not by arbitrary mechanical constants or the viscosity of fluids.