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going to the high side when it comes to tracking force. High frequency vibrations can
cause a light-tracking cartridge to cause more damage to the grooves than running a
cartridge at a heavy setting. Make sure the damping fluid is not installed when setting
this force.
Next, the lateral balance or azimuth must be set. Because the phono cartridge is
offset, there is an unbalancing force that tilts the arm to one side. For the cartridge to
properly track the record groove, the stylus must be ninety degrees to the record
surface. Rotate the counterweight so a slight tracking force is applied and the stylus
just sits on the record surface.
At the bottom of the arm tube (upper) bearing housing is a ring with one flat section.
Rotate this ring (see figure below) as needed to bring the arm into correct lateral
balance. When the azimuth has been set, you can lightly tighten the set screw located
on the side of the ring. To make this task easier make sure the armtube is parallel to
the record surface.
90 degrees
AZIMUTH BALANCE RING
TIP! The arm will tilt away from the flat portion of the ring. Turn the flat towards
the side of the arm that is hanging down.
Unlike other unipivot arms, the JMW’s lateral balance weight does not hang off to the
side of the arm. Instead, its position around the bottom of the upper bearing housing
places the weight below the pivot point. This increases mass below the pivot and
increases arm stability.
AllegroSound.com
Содержание JMW 10
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