From Rega's
RB-300 Instruction Manual:
Cartridge tracking force adjustment
1. Ensure that the tracking force adjustment knob is set to the zero position.
2. With the cartridge permanently fitted in the correct position adjust the main balance weight so that the arm is “floating” with the stylus just 1mm clear of a record. (This adjustment should be made with the anti-skating knob to zero. Note: Even at zero there will be some small residual anti-skating force. Therefore it may also be necessary to gently touch the arm bearing carrier to stop the arm moving out- wards).
3. Rotate the tracking force adjustment knob to the required tracking force. If in doubt it is usually advisable to use a tracking force that corresponds with the upper limits of the cartridge manufacturer’s range.
Anti - Skating (bias) adjustment
Set the bias adjustment knob to the same number as the tracking force. Note: This is not critical and a figure of 1-1.5g will normally be suitable for moving magnet cartridges and 1.5-2g for most moving coil cartridges.
NOTES: (From me regarding the numbered points above)
Cartridge tracking force adjustments
1. The tracking force adjustment knob is the calibrated black dial that is positioned on the RH side of the arm carrier/pivot.
2. Let's assume that the cartridge is permanently fitted in the correct position for now. The main balance weight out back isn't threaded, however, turning it whilst pushing or pulling slightly works well enough for fine tuning. If the arm leans downward too much up front, the weight needs to go back further. Too high up front and the weight need go forward a smidge.
3. Dial in 1.6g on the tracking force knob for the Reson.
Anti - Skating (bias) adjustment
The bias adjustment knob is the small round button positioned just aft of the arm rest cradle on the arm rest outrigger platform beneath the tonearm tube. This is what must be set to zero whilst balancing the tonearm, as per Rega's step 2 above.
