Kuzma STOGI REF 313 110513 - Manual (Page 8)

4.0. Tonearm adjustments:
4.1. Adjustment of tracking force:
4.1.1. Balance scale:
Set up the cartridge tracking force with the balance scale, which must be at record height.
Rotate the counterweight towards the tube to increase tracking force.
4.1.2. Manually:
Balance tonearm to zero. Then the position of one dot should be noted and taken as zero, (any
dot will do, so choose the most easily visible). Then simply turn the counterweight
anticlockwise counting each dot that passes that position as an increased tracking force of
approximately 0.1gram. For example a tracking force of 1 gram will necessitate turning the
counterweight past 10 dots or two complete turns the counterweight.
4.1.3. Counterweight fixing:
The counterweight is secured by gently turning one of the three screws M3 with the Allen key
1.5mm. Do not, however fix securely at this stage until tangentional tonearm adjustments are
completed.
4.2. Adjustment of tangential geometry:
4.2.1. Tonearm height adjustment (rough Vertical Tracking Angle-VTA):
Note: Do not drop the tonearm in the armbase.
Put a record on the platter and adjust height of the tonearm’s VTA in such a way, that the
central axis of the tube will be parallel to the record. This is only a starting point for VTA.
Position the needle carefully in the normal playing position above the record with the lift still
“up”, to ascertain how low or high the arm is.
If tonearm is too low, then the tonearm must be raised by releasing the screw in the base while
holding the tonearm by the ‘C’ shape and lifting it up. Tighten VTA screw when the tonearm is
in position, though do not over tighten.
Repeat process until the arm is high enough to clear the record.
The needle should be in the groove. If not the tonearm is too high and should be lowered.
Note: Ensure the needle is properly in the groove; observe the cartridge body reflection on a
record surface. This is more easily seen if the stylus is in the middle grooves of the record side.
4.2.2. Tangential geometry adjustment:
Note: Do not adjust the cartridge by observing the body of the cartridge only. Observe the
cantilever.
Once the cartridge has been mounted, it is necessary to ensure that the cartridge is tangentional
to the record grooves in order to minimize tracking distortion during playing. As the cartridge
moves in an arc across the record, tracking distortion occurs and is minimized by the tonearm
geometry and the angle of the cartridge in the headshell.
With optimum tonearm geometry very low distortion levels (below 1 %) can be obtained across
the entire playing surface. Cartridges have zero distortion at two points on a record and these
8