Philips model AF829 turntable is front operated, direct control, and fully automated. Direct control is a new system combining the advantages of measuring the actual speed at the turntable and the well-known advantages of belt drive, in combination with the subchassis principle used in earlier Philips turntables. The major achievement, is that it brings the specifications to the level of direct drive, but without the inherent problems of direct drive. The speed of the turntable is continuously sensed by the tacho-generator and converted into a voltage, the output of which is fed into the control unit where this voltage is compared to a reference voltage. The resulting difference voltage is used as a control signal to adjust motor speed. Thus in this system all external influences are compensated, including changes in tracking force, different record weights, use of a dust bug, changes in environmental temperatures and relative humidity, mains voltage, and frequency fluctuations. Wow and Flutter : less than 0,025 (WRMS) Rumble: less than 73 dB (DIN B) Tracking Error: less than 0°9' /cm Dimensions (W x H x D): 450 x 141 x 365 mm Has signs of usage but is in overall good condition.