Kuzma STOGI REF 90630 - Manual (Page 11)

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4.4.2. Fine Azimuth adjustment:
Note: See appendix 2.
The easiest way is to use an appropriate program with a test record and PC.
It can also be done using an oscilloscope with a test record or by using good records in
a good system and listening to the sound. Cartridges with fine profiles (VDH,
Microline etc.) are more sensitive to this adjustment. On the other hand cheaper
cartridges are not made so well, so making fine adjustment is also useful.
Start listening with the tube in zero position, ie. with the marking lines aligned.
Listen to the sound-stage, the focus and the stability of the instruments. Release the
two locking screws and rotate the Allen key so that tube rotates for approximately the
width of the mark. Listen and then rotate tube for a similar amount in the opposite
direction and again listen. Adjust the arm to the position in which the best sound was
obtained. In this position make further adjustments by turning the Allen key for a
quarter turn in one direction, listening and then turning a quarter turn in the other
direction and listening.
Continue this process making ever decreasing adjustments, 1/8 of a turn, then 1/16
and so on. When optimum results are obtained fix the locking screws.
Note: During fine adjustment only gently fix locking screws during listening.
The adjustment screw is highly sensitive and the smallest pressure on the Allen key
will alter the azimuth and sound.
Do not attempt any adjustment when the locking mechanism is locked. Although no
damage can be done.
Significantly improved sound can be obtained by paying attention to azimuth
adjustment prior to final VTA adjustment.
To make azimuth adjustments, release the two screws locking the mechanism at the
centre top of the main tonearm tube, with Allen key 2mm. Under the main tube is a
tiny rod with a hexagonal screw. Insert the Allen key 2mm into the screw (it may feel
loose), rotate it slightly and it will alter the azimuth. (Fig.1)
Rotating it back will bring azimuth to its previous position. Changes can be seen by
misalignment of the white lines on the top of the centre of the tube. Even 15 degrees
rotation of the Allen key will make a significant difference.
4.5. Bias adjustment:
Note: see Appendix 3.
The bias should be adjusted according to the tracking force. Using Allen key 1.5mm,
until the position of the weight is equivalent to your chosen tracking force. Lock
screw when in position.