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Technics SL-3 Servo Drive Automatic Turntable System - $150 (Riverview)
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The arm uses a linear tracking arm that linearly moves the record board.
By means of an optical sensor arm deflection angle detection mechanism near the needle tip and microcomputer control, the tracking error angle is within ± 0.1 ° and the inside force is almost 0, achieving excellent running performance.
In addition, the arm bearing structure is a 4-point support gimbal suspension system with a pivot and ball bearing, and a dynamic balance system in which the center of gravity is aligned with the center of the arm rotation axis, realizing stable trace running without precise horizontal adjustment or needle pressure adjustment.