Features
@
Top/mount spring screw
@
Adjustment
for
tonearm
cueing
height
@
Adiustment knob
lor
tonearm
balance
@
Direct-dial tracking
lorce
adjustmenl
@
Speed selector
@
Auto/manual cueing
system
@
Tonearm
rest
@
Tonearm
lock
@
Cartridge
@
Tonearm
lilt
@
Adapter
for
large-hole records
Operating instructions
With
the
Dual 420
all
microgroove
and
siereo
records can be
played.
With
the
push button
set
next
the
neces-
sary
turntable speed
on
33
or 45
rpm.
Now
place
the
record
on the
turntable
platter
and
release
the
tonearm.
The
Dual
is
now
ready
for
play.
Fig.
6
1.
Operation
The
movement
of
the tonearm toward
the
record
will
start the platter
rotating.
To
lower down over
the
lead-in
groove
or the
desiqld position
on the
record,
a
light
touch
on
the cueing
lever
is
all
that's
necessary
and
will
bring
it
to
the
position
!
.
gy
this
means
the
cueing
control
will
lower and
the
needle
sets
down perfect
with
absolute accuracy
on
the
record.
The height
of the
stylus over
the
record
in position
V
can
be
varied
over
a
t/t"
range by
turning
adjustment screw
@.
2. To interrupt
play
Move
cueing lever
to
position
V
.
6
Fig.
7
3. To
resume play
Move
cueing
lever
to position
!
.
(n
tignt
touch
is all
that's
necessary.)
4.
Switcfi off
When
the
record
has
finished playing,
the
record
player
turns
off
automatically
at
the
same
time the
tonearm
lifts
itself
off
from
the
record
and
the
cueing
lever
goes
into
position
V
Please
set
the
tonearm back
on the
tonearm rest.
We
recommend
that
after
using
the
record
player,
the
tonearm should
be
locked
(Fis.
6).
Changing the
Pick-uP
cartridge
To take out the
pick-up
cartridge,
unlock
the
tonearm
and hold
it
with
the
left
hand.
With
the right
hand thomb,
pull
down
the
pick-up
cartridge
until
it
snaps
out.
Mounting the pick-up cartridge,
Hold
the
pick-up cartridge
between
the
thomb and
the
index
finger
of the
right
hand
and
slanting
it
inside
the
pick-up
head so
that the
guide bar
of the
pick-up
cartridge sets
into
the wide
cut-out.
Balancing the tonearm
1.
With
the cartridge mounted
in the tone-
arm
head,
turn the
tracking
force dial
to
"0".
2.
Loosen
the
set-screw
of
the
tonearm
counterbalance,
and
move
the
tonearm
iust to the
inside
of the
resting
post.
3.
Flick
the
cueing lever
to
position
V.
A
light
touch
is
all
that's
necessary.
4.
Turning the knob counterclockwise
rai-
ses the
tonearm
head;
turning it
clockwise
lowers the tonearm. The tonearm is
accu-
rately balanced
when
the tonearm
returns
to
this position
by
itself
when
it
is
lightly
tapped.
Fig.
9
Precise balancing of the tonearm is
espe-
cially
important
with
cartridges
specified
lor
low tracking
forces.
The
tonearm needs
to
be
balanced
only
once
unless
a
cartridge
of a
different
weight is
substituted.
Applying tracking force
With the
tonearm balanced
at
"0",
apply
tracking
force by turning
the
calibrated
dial to
the desired
number.
The Dual
pro-
vides
for
applying tracking
force
in a
con-
tinuing
range
from
0 to
5,5 grams.
For
the correct
stylus
force, follow
the
instruc-
tions
provided with the cartridge.
Fig.
I
Fig.
10