Primary Control Field Coil Loaded (FCL) tonearm


Primary Control presents a new bearing technology –  the world’s first field coil loaded uni-pivot tonearm. This technique provides high torsional stability and a low moment of inertia for the tonearm. Bearing chatter, caused by energy transfer in the uni-pivot bearing, is eliminated.

In combination with the newly developed ultra low resonance armwand, the result is a finely detailed reproduction and a sonic performance unmatched by any other uni-pivot tonearm design.

Field coil loaded uni-pivot bearing
• Constant current regulator
• Torsional motion feedback control in real time
• No bearing chatter
• High torsional stability
• Non-friction magnetic anti-skating
• Ultra low resonance armwand

The position of the magnetic anti-skating device is adjustable and unlike many other anti-skating devices is not dependent on the mounting position of the tonearm.
The anti-skating force takes into account the dynamic character of the skating force over the radius of the record.

The field coil with it’s specially formed counter magnet plus the Constant Current Source (CCS) regulator provide the basis for the stabilised uni-pivot bearing.
The field coil also functions as a sensor for unwanted torsional movements. The CCS compensates for field variations in real time and keeps the magnetic field stable.

The CCS regulator provides the power for the field coil which keeps the current stable within the magnetic field in all situations.