VPI Industries JMW-9T Bedienungsanleitung PDF herunterladen (Seite 4)

 Move the counterweight until the arm has a very slight downward tracking force, just enough

to keep it from moving sideways on the platter or enough to keep it in the groove of the

record

 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. Move the

counterweight so a slight tracking force is applied and the stylus just sits on the record

surface.

 Rotate the counterweight as needed to bring the arm into correct lateral balance to set

azimuth. When the azimuth has been set, you can lightly tighten the setscrew located on the

top of the counterweight. To make this task easier make sure the arm tube is parallel to the

record surface. Lay a long thin rod (like a fireplace match or a mixing straw) behind the

cartridge mounting screws and use it as a guide for setting azimuth.

Long thin rod

90 degrees

Rotate

 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.

D. TRACKING FORCE:

 Tracking force is adjusted by moving the counterweight forward and back just a bit at a time.

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 9 Signature does not have a built-in tracking force gauge, but a Shure Stylus

Force Gauge is supplied with your unit. Following the gauge instructions set the tracking

force to the cartridge manufacturer recommendation plus 1/10 of a gram more. We

always recommend 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.

E. ANTI-SKATING:

1 2 3 4 5 6 7

Keine Kommentare

VPI Industries JMW-9T Bedienungsanleitung Seite 4