regarding set up and care. To help newcomers to this
area we have published the following notes. These
guidelines are of a general nature - we publish them only
to be of help and although widely accepted they are not
formally authoritative - we cannot accept liability if you
choose to use them and neither do we encourage the time
consuming occupation of answering queries surrounding
the procedures outlined - these are best referred to the
manufacturer of your specific Hi-Fi cartridge.
For those new or inexperienced to fitting Hi-Fi cartridges
we would state that this is NOT difficult and much of the
detail and perfectionism outlined below is for those who
like to experiment. We ourselves do not normally check
azimuth, or vary tracking forces from the manufacturers
recommendations - neither would we worry if the arm
was up to 1mm away from the recommended distance
from the spindle - although all these details are audible
they are generally of a relatively low order, however
tracking force and VTA in particular are worth fine
tuning should you feel anything is lacking. f things
seem complicated we would encourage you not to be put
off as it all becomes clear once you get started.
Before fine tuning the set up as described below you
should allow the cartridge to “run in” properly - at least
40 hours for some cartridges.
Importance of set up
Hi-Fi cartridges travel like a bobsleigh through the
grooves of a record only a few thousandths of an inch
wide. You hear groove displacements of the order of a
few millionths of an inch. (That’s like splitting a hair
into one thousand pieces.) Every movement or vibration
at this level can be heard enormously amplified through
your speakers. For this reason it's good to set up the
turntable and arm correctly so that the audio cartridge
can do it’s job properly.
For example a turntable significantly out of level can
produce side forces on the pickup cartridge tip that will
wear it more on one side than the other as well as have a
slightly degrading effect on the wear of your records.
Levelness
When a turntable goes out of level, the platter bearing
performance and the arm’s dynamics, specifically anti-
skate, are negatively affected. So be sure your turntable
platter and tonearm mounting board are level - use a
spirit level.
f the platter is out of level, first adjust the surface that
the deck stands on. The suspension (in the case of a
suspended sub-chassis design) may also need levelling if
it's subsided over time.
f the arm board is not level (which means the arm pivot
is not vertical), either return it to your dealer for repair or
re-level it yourself by shimming between the mounting
board and it’s support.
Cartridge alignment
Alignment for Hi-Fi cartridges needs to be
optimised in three different planes. The final
authority should always be your ears and preferably
over an extended period of listening.
Bear in mind that each record is cut slightly
differently so optimise for an overall balance of
good sound over a wide range of records.
The three alignment planes are as follows. (Please
note that it's the stylus, not the cartridge that is
being aligned.)
Lateral tracking angle
Viewed from above, the Hi-Fi cartridges arcing
movement across the record must maintain the
stylus in the same relation to the groove as that of
the cutting stylus’s straight-line tracking; this is
Lateral Tracking Angle, or Tangency. Apart from
linear tracking arms this is always a matter of the
best compromise.
Azimuth
Viewed from head on, the stylus must be
perpendicular in the groove so as not to favour one
groove wall, and therefore one channel, over the
other wall/channel; this is Azimuth.
Vertical tracking angle (VTA)
Viewed from the side, the stylus must sit correctly
in the groove, at the same angle as the original
cutter; this is Vertical Tracking/Stylus Rake Angle.
This alignment must be set by ear, even more than
is the case with the other adjustments.
Note that because record thickness varies, set the
VTA on the most commonly used thickness of
record.
Cartridge alignment tools
Tools required are an alignment gauge, a ruler, a
tracking force gauge, a FLAT record, a screwdriver
or Allen keys of the right size (usually 2mm), a
good light may also be helpful. Small needle-nose
pliers and a magnifying glass all help. A good “test
record” such as the Hi Fi News test record is
useful.
Bear in mind that the most severe “tracking ability”
tests are hopelessly unrealistic and nothing tracks
properly on them.
Treat the arm with care as some parts are fragile. To
this end ensure that tightening of any bolts is
carried out gently and without causing undue strain.
Tonearm wiring
Tonearm wiring uses a standard colour code for
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