Turntable Product

Overview

A turntable plays music cut into the spiral groove of a vinyl record. The record turns at a steady speed while a diamond stylus rides the groove; the wall-to-wall wiggles of that groove are a mechanical copy of the original waveform, and the cartridge turns them back into an electrical signal. This is a belt-drive deck, where a soft belt links the motor to the platter so that motor vibration never reaches the record.

Everything is built on the Plinth & Chassis, a heavy damped chassis on adjustable feet that isolate the deck from footfall and shelf resonance. The Platter Assembly spins on a precision main bearing, driven by the Drive System. Reading the groove is the job of the Tonearm Assembly and the Phono Cartridge it carries, and the tiny signal they produce is raised to usable level by the onboard Phono Preamp Board before it leaves through the RCA outputs.

How it works

The Drive System uses a low-torque synchronous motor whose speed is locked to its drive frequency. A stepped Motor Pulley and an elastomer belt turn the heavy platter; moving the belt between the two pulley diameters selects 33⅓ rpm for albums or 45 rpm for singles. The platter's mass acts as a flywheel, smoothing out the small speed errors that show up as wow and flutter, while the belt's compliance filters out motor noise that would otherwise become audible rumble.

The platter rides on a Spindle Shaft in an inverted bearing, turning in a close-tolerance sleeve on a single thrust point, and a Slip Mat couples the record to the platter. Above it, the balanced Tonearm Assembly lets the cartridge float across the record on near-frictionless pivot bearings. The Counterweight sets how hard the stylus presses into the groove, an anti-skate spring cancels the inward pull that would otherwise load one groove wall, and a damped cueing lift lowers the arm gently onto the lead-in.

Inside the Phono Cartridge, the diamond stylus sits on a thin cantilever that carries two small magnets. As the stylus traces the groove, those magnets move inside fixed coils and induce a stereo voltage of only a few millivolts. That signal is far too small and too bass-light to use directly, so the Phono Preamp Board amplifies it and applies the RIAA equalisation curve that was used in reverse when the record was cut, restoring flat response and feeding line-level stereo outputs along with a ground terminal that drains hum.