Dual 1218 Instrucciones De Manejo página 10

Technical notes
Cartridge {pick-up)
The lollowing instructions apply only
if
your
automatic turntable
was
purchased
without
a
cartridge
installed.
Fitment of
the cartridge
should
be
done by
an
authorized Dual
service
dealer,
with
the excep-
tion of
cartridges
with
Dual snap-in holder.
When
f
itting the cartridge, use
the
built-in
cartridge
holder
or
another cartridge
holder
(Dual
TK
14,
article No. 215
43O).
This model
will accept any cartridge weighing
from 1
to
12 grams
and having 112"
spaced
mounting
holes.
2.
Fasten
the cartridge
with
the
help
of
the
fitting
accessory
supplied
with
the
cartridge,
Be
sure
it is
located
correctly
(Fig.
12).
3,
The connections
on
the cartridge
holder
and cartridge are marked
(Fig.
13). Connect
the
leads
with the
appropriate
terminal pins
on the cartridge.
4.
Re-insert
the
cartridge
holder in the
tone-
arm
head
from
underneath,
and
secure it
kiy
moving the tonearm
grip forward.
Stylus
The
stylus
is
subject
to
wear during
use.
We
recommend
that
the
diamond stylus should
be
checked
after playing about 300
hours,
Your
authorized
dealer
will
be glad
to
check
your
stylus free
of
charge.
A
worn out or
damaged
stylus
chisels
the
mo-
dulations
in
the
grooves and
damages the
record.
Replace the
worn out
stylus
with
one
that exactly
meets
the
cartridge's
specifica-
tions. lmitations
will
result.in a
ioss in sound
quality
and
will
increase
the
damage
to your
records.
Please notice
that the
needle carrier
with
a
diamond stylus, due
to
size, is
very
sensitive
to
shocks,
vibrations
or
sudden impacts.
ln
order
to
have
your
stylus changed
take
the
complete cartridge
(with
stylus)
and
have
lt
done
by your
nearest
authorized
dealer.
Balancing the tonearm
The
tonearm
is
balanced,
first
by sliding the
counterbalance,
and
then
by
rotating
the
weight.
1.
Set
the stylus force dial to
zero.
2.
Unlock the tonearm, and
lift it
off
the
rest
Fig.
14
3. lf
the
tonearm does
not
come
to
rest
perfectly horizontal,
loosen set-screw
( F)
and slide
the counterbalance
(with
its
shaft)
until you
achieve
an approximate
balance.
Then
tighten
the set-screw again.
4,
You
can now get an exact
balance
by
turning the counterbalance.
The
tonearm
is
precisely
balanced when
edge
"A" of
the
tonearm head
and
edge
"8" of
the tonearm rest
are
at equal
height
(Fig.15) or
when the tonearm returns
by
itself
to a
horizontal position after
the
chassis is
tapped.
Precise balance is especially
important with
cartridges
that
require
a
low
stylus
force.
The
balancing
operation
need
be done only
once,
unless
you
install a
different
cartridge.
Fig.
15
During
the
balancing
of
the
tonearm
the
operating
switch must
be in its
neutral
position, so that
the tonearm is
disengaged
from the automatic
mechanism.
To
be sure,
lock the
tonearm
on the
rest post,
then
rotate the turntable by
hand, clockwise, until
the
operating lever
returns
to its
neutral
position.
Setting stylus force
Once
the
tonearm
is balanced, set
the
stylus
force
by
turning
the stylus force dial.
The
force is
continuously adjustable
from
zero
to
5.5 grams with
an accuracy
of
+
0. 1
gram.
The
unit
will
function
properly with
as
little
as
0.5 gram stylus force.
Fig.
16
Every cartridge has
an
optimum
tracking
force, which provides the
best
reproduction,
For the
best
figure
for your
cartridge, consult
the information provided with it.
For factory-installed
cartridges,
you will
find
all
necessary
details
in a
leaflet
that
accom-
panies
these instructions,
Too low a
stylus force produces
distortion
in
loud recorded
passages.
Too
high a stylus
force can
damage
the
stylus and
record.
Anti-skating
To
compensate
for
this
skating force
and
eliminate
its
effects,
a
very accurate
coun-
terforce
-
accurate
in both
magnitude
and
direction
-
must be applied
to
the
tonearm.
The
anit-skating system
of your unit
ful-
fil
ls
this requirement.
t
1
12 Fig
1. To
install
a
cartridge, remove
the
car-
tridge holder
from the tonearm
by
pres-
sing
the grh
toward
the
rear.
Hold
the
cartridge
hofder
or it will fall out
once
unlocked.
left channel "
L
I
left ground
GL
I
right ground GR
right
channel
Fig.
13
Fis.
1
1
10