V. Antiskating adjustment

The friction of the stylus in the moving record groove produces a force which may be resolved into a component Fr pulling lonngitudinally on the tonne arm and a component Fs pressing perpendicularly on the inner groove wall (Figure 11).

Fs is designated as the skating force; it can lift the stylus out of the groove and send it skating across the record surface toward the center of the turntable.

To counteract this tendency, an additional weight on the THORENS TP 11 MkIII Tone Arm applies an antiskating force directed outward.

The required antiskating force is indicated in Figure 12 and Table I.

If the record surface is entirely covered by a film of liquid (for liquid groove cleaning), the required antiskating force is reduced. The column in Table 1 labeled "liquid" consider this condition.

The figures of Table I are applicable for both spherical and elliptical styli for tracking forces of up to 2.5 grams. For elliptical styli, tracking forces greater than 2.5 grams should be avoided to prevent excessive record wear.

If distortion should occur even though the stylus force recommended by the cartridge manufacturer has been set (with corresponding antiskating force), a corrective adjustment is necessary.

To determine the proper antiskating setting, select a good stereo recording containing loud, fortissimo passages near the end of the recordd.

• If distortion is clearly audible in both channels, increase the trackig force by small amounts until the distortion ceases or diminishes to a minimum in one channel.
• Set the antiskating force to a low position (e.g., 0.5) and observe the effect. Gradually increase the antiskating setting until the distortion ceases in both channels.

If the distortion moves to the other channel, the antiskating force is too high and must be reduced.