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push the connectors all the way on, as this could damage the cartridge. Always back
up the cartridge with your finger when pushing on the clips.
THE COUNTERWEIGHT:
The JMW tone arm comes with one large counterweight installed on the rear shaft of
the tonearm. For most cartridges you will only need this large weight. The rear shaft is
very finely threaded, and the counterweight mates to the thread by two rubber "O"
rings.
For now, position the large counterweight as close to the bearing housing as possible
(toward the front of the arm) but not touching the azimuth ring. The object here is to
balance the arm while keeping the counterweight as close to the bearing housing as
possible. This results in the least inertia for a given cartridge weight.
In some rare cases it may be necessary to use two counterweights together. Contact
your dealer if a second counterweight is needed.
BALANCING ARM: TRACKING FORCE AND AZIMUTH
Place the arm tube assembly on the lower bearing, taking care not to strain or damage
the 4-color wire and Lemo connector. Place the arm in its rest.
At the rear of the arm base assembly is the connector block. Plug the Lemo connector
into its receptacle on top of the block. Notice that the connector can plug in only one
way. Align the red dots on the arms plug with the red dot on the receptacle. Push
gently, do not force the plug.
Depending on the twist given to the wire when the plug was inserted into the box, the
arm will have a tendency to swing inward or outward when it is in neutral horizontal
balance. Later on, you will adjust the wire's twist to provide slight anti-skating
compensation.
Make sure the turntable is level. Refer to your turntables instructions and use a bubble
level to check level. In most cases, the best place to put the level is on the platter.
With a unipivot arm it is particularly important to level the turntable. This insures
that the damping fluid will not even come close to overflowing its well.
Tracking force is adjusted by moving the counterweight forward and back just a bit at a
time on its thread. At least initially, you will
be setting the tracking force twice. The first
time will be before the cartridge's overhang is set. After this is done, you will need to
double check the tracking force and adjust it as needed.
The JMW Memorial Tone Arm does not have a built-in tracking force gauge. You can
use any of the after market gauges available. Following the gauges instructions set the
tracking force to the cartridge manufacturers recommendation. We always recommend
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Summary of Contents for JMW 10
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