16. Balancing the Arm (Longitudinal)
1. If a detachable stylus guard is fitted to the cartridge it should be removed, thereafter
handling the arm with suitable caution.
The balance-weight is unlocked by releasing its central screw using the 3mm A/F ball-
ended wrench. A half turn anticlockwise is sufficient and for this purpose should not be
exceeded.
2. Check that the anti-skate control is set at zero. Position the arm so that it is clear of the
armrest and the cartridge is clear of the turntable. Move the control lever into the lowered
position. Balance the arm by rotating the leadscrew, using the 3mm A/F ball-ended
wrench. This moves the balance-weight backwards or forwards as required. Adjust until
the arm with the cartridge fitted is either level or slightly low at the front end when the
balance-weight is re-locked.
17. Vertical Tracking Force (VTF) Adjustment
1. For safety the lever of the lowering control should now be moved into the raised position.
The front face of the handle of the 3mm ball-ended wrench carries arrows and letters A-
B-C-D at quarter turn intervals.
To apply VTF, unlock the balance-weight one quarter turn only. Note the position of one
of the letters, after engaging the wrench with the leadscrew, and rotate in the direction of
the arrows. One full turn applies 0.5g or 0.125g for each letter. For example to apply 1.5g
VTF, three complete turns of the wrench will be required.
When reducing VTF by opposite rotation of the wrench, move the balance-weight slightly
further than required so that final adjustment is made in the forward direction thereby
taking up any backlash in the thread. Re-lock the balance-weight. Whilst the foregoing
procedure is sufficiently accurate for all normal purposes, VTF can be further checked
with a stylus force gauge if one is available.
18. Arm Height (VTA) Adjustment
1. Insert the VTA screw into the screwed bush at the further side of the arm between the lift
lower dashpot and the yoke assembly. Screw in clockwise and continue to rotate until
resistance is felt. Further rotation will increase the height of the tone-arm relative to the
base. To lower the tone-arm turn the VTA screw anticlockwise. Finger pressure on the
yokehead will then move the arm downwards until it stops on the screw, at which point
further movement in either direction can be made as needed.
2. Use an old but unwarped record for the following procedures in case of accidental
damage.
Place the arm about halfway across the record and move the control lever forward into the
playing position. Adjust the arm height until there is approximately 3mm (1/8”) clearance
between the underside of the tone-arm and the surface of the record at its circumference.
To Next Page
Loading...
Need help?
General
