8
Fig. 9c. Removing headshell Fig. 9d. Headshell’s fingerlift
Balancing of the tonearm:
Fix cartridge clips. Rotate the counterweight and aim for roughly zero balance.
The tonearm's centre of gravity is chosen to be around the height of vertical rotation, therefore
balancing the tonearm to zero is very difficult. Adjust it to be roughly balanced and increase
tracking force by counterweight rotation.
If the counterweight is too loose, hold the front part of the counterweight and rotate the rear part until
there is a tighter fit, or lock it into position on the threaded carrier. Opposite rotation will make the
counterweight looser. (Fig. 10)
Fig. 10. Counterweight
4. Tracking force
Set tracking force by using a balancing scale, which must be at record height. Rotate the
counterweight towards the tube. Rotation for one dots will change tracking force by approximately
0.15 g. Set the tracking force suggested by cartridge data.
Check that the cueing device is at the correct height (See Paragraph 9).
5. Tangential geometry set up
Put a record on the platter, cue cartridge, lift up cartridge from the record and adjust height of the arm
tower in such a way, that the central axis of the tube will be parallel to the record. If you cannot move
the arm tower down, check VTA screw. (See Paragraph 6 )
Using the protractor, adjust geometry at two null points. Rough guidance is given by the edges of the
cartridge body, but accurate adjustment is by observing whether the cantilever and lines are parallel
at the two null (zero) points or by special single null point protractors. ( Fig. 11)
See Appendix 1.