Dual 1009 F User manual

OWNER’S MANUAL
DUAL 1009 F
AUTO/PROFESSIONAL
TURNTABLE

OPER ATING Needless to say, we are delighted that you have chosen the Dual 1009F.
Now, like most new owners, you are probably eager to get set up and
i N STR U Cri Oo N Ss play your first record. This won’t take long, but it is important that you
read the installation instructions carefully (on the inside of this
flap). We also suggest you familiarize yourself with the 1009F’s many
operating features as described on the following pages. Each of them is
a typical example of Dual’s advanced technology. Pleasant listening!
Master Operating Switch
This one feather-
touch slide switch
controls all operat-
ing functions, in
both single play and
changer operation,
as described below.
For automatic start,
you move it past
STOP to START: For automatic stop, move it to
stop, To start the platter rotating without putting
the tonearm into cycle, move to MANUAL after lift-
ing tonearm frdm resting post and moving it
toward the center.
Preparations for Play
Select the correct speed and record indexing size
for the record to be played, then insert either the
short spindle (for single play) or the Elevator-
Action spindle (for changer operation).
Single Play
1. Automatic Start:
move the slide
switch to START.
2. Automatic Start with
Cue-Control. First
move Cue-Control
to position ‘W, then
move slide switch to sTaRT. (This provides an
even more gradual tonearm descent, as sometimes
preferred for ultra high compliance cartridges.)
3. Manual Start (on rotating record):
a. Lift tonearm
and move switch to
MANUAL. (This can
easily be done with
one hand as shown.)
b. Place tonearm
on record.
4, Manual Start (on motionless record):
a. Place tonearm on record.
b. Move switch to MANUAL.
5. Cue-Control Start (on rotating record):
a. Move Cue-Control to position W.
b. Place tonearm over lead-in groove (or over
any other groove).
c. Move switch to MANUAL.
d. Flick Cue-Control to position W.
6. Cue-Control Start (on motionless record):
Same as 5, but reverse steps d and c.
7. To stop play: (tonearm returns to rest, motor shuts
off)
Push to stop.
8. To interrupt play and replay from beginning:
Push gently to stop, pause, then continue to
START.
9. To interrupt play: (when play is to be resumed
where interrupted).
Move Cue-Control to position W.
10. To resume play:
Flick Cue-Control to position W.
NotE: at the end of play, the tonearm will return
to its resting post and the entire machine will shut
off automatically.
Automatic Changer Operation
Insert the changer co es
spindle by placing i
the key at its base
into the slot of the
shaft. Then turn the
spindle clockwise
until it stops. Up to
ten records can be
placed on the
spindle.
All the functions for single play, as described
above,
are
exactly
the
same
in
changer
operation,
plus these additional functions:
1. To reject a record during play and change to the next
record on the spindle:
Push gently to stop, pause, then continue to
START.
2. To skip the next record on the spindle:
Push to stop. After that record drops, push to
START and the next record will drop.
Note: Any record already on the platter, can be
replayed either automatically or manually, just as
with the single play spindle. If there are any rec-
ords on top of the one you wish to replay, simply
lift them back onto the platform or off the spindle.
(The 3-pronged platform will retract into the spin-
dle as the records slip past.) No need to remove
the spindle itself.
Jamproof Tonearm
During either single play or changer operation,
the tonearm can be lifted from the record, moved
and placed down again either by hand or by the
Cue-Control. The tonearm may even be restrained
during cycling without causing any malfunction . . .
thanks to its foolproof slip-clutch.
Open flap for
Installation
Instructions

INSTALLATION
INSTRUCTIONS
Installation on Base or Mounting Board*
Required dimensions: 12%" width; 1142“
depth (including 1” for rear overhang of
tonearm). 642” height above base, 3”
below.
These ingeniously designed mounting screws make
it possible to install and remove your Dual from
either base or mounting board entirely from the
top. There’s no need to fumble underneath or to
take anything apart.
1. Position the chassis over the base so that the
three cupped spring-mounted footings will fit into
their cut-outs. (The notch on the base for the rear
top/mount spring screw will then be at the upper
left.) Tilt both mounting screws to let them slip
past the notches as you lower the chassis. (Fig. 5A)
2. Turn each screw clockwise until it is firmly
seated into the top of the chassis. (Fig. 5B) That’s
all there is to it. To remove the Dual, simply re-
verse the above procedure.
To Transport the Dual Without Demounting
1. Loosen both top/mount spring screws, depress
the chassis against the base, then continue to turn
each screw counter-clockwise until it stops. The
chassis will then be locked firmly against the base.
(Fig. 5C)
2. To avoid possible damage to the platter bearings
in transit, insert the plastic wedges (supplied in the
accessory bag) between the platter and chassis.
Position the wedges at equal distances for maxi-
mum support. Or you can remove.the platter from
the chassis (See below).
With the chassis now on its base, slowly and gently
lower the platter onto the shaft.
The oiled felt plug in the center hole will lubricate
the shaft as it is forced out, and it may then be
discarded.
The platter can be secured to the chassis if de-
sired, by the spring-clip. Use the special accessory
cone (supplied in hardware bag) to press the
spring-clip
down.
As
shown
in
fig.
25,
a
coin
makes
this
easy.
(The
same
cone
is
used
to
re-
move the spring-clip as shown in fig. 26.)
Finally, insert the decorative round disc under
each of the three lips on the mat.
Mounting the Cartridge*
Note:
Any
cartridge
weighing
between
1
and
8
grams
and
meeting
standard
U.S.
mounting
specifications
can
be
used
with
the
Dual
1009F.
For
cartridges
weighing
up
to
13
grams,
order
special
counterbalance
shaft
12L-U118.
1. Release the cartridge holder from the tonearm
head by pressing the tonearm lift a short turn to
the rear. Be ready to catch the holder, as it will
drop right into your hand (Fig. 10).
2. The special gauge supplied
with your Dual, when snapped
onto the holder as shown in
fig. 9, will indicate the correct
stylus depth for the cartridge
when mounted. (Be sure the
ridges on the inside of the
gauge walls fit into the cor-
responding tracks on the side of the cartridge
holder.)
When the cartridge is mounted at the correct
depth, the tip of the stylus will protrude slightly
into the notch of the gauge. (Use the necessary
spacers and screws provided in the accessory bag.)
3. The specially tapered wedge, also supplied, is
for use when you intend to play single records
either exclusively or primarily. (Fig. 8) This wedge
provides the optimum 15° vertical tracking angle
when one record is on the platter. (However, even
without the wedge, the vertical tracking angle will
still be well within standard industry tolerances
for single record play.)
4, Remove the gauge when actually mounting the
cartridge, then snap it on again — carefully — to
check stylus overhang. When viewed from the top
(Fig. 9. ), the stylus should be centered within the
notch of the gauge.
5. Finally, tighten screws, making sure cartridge
is positioned straight. Note dotted line in fig.9.
6. Connect each lead
on the cartridge holder
to its corresponding
pin on the cartridge.
Each lead is color-
coded as shown in
fig. 10.

7. Attach the cartridge
holder by placing it
against the tonearm
head as shown in Fig.
11, lift it up and lock it
by pressing the tone-
arm lift forward.
fi)
Balancing the Tonearm *
1. With the tonearm locked and the stylus force
scale set at 0, screw the shaft of the tonearm coun-
terbalance onto the rear of the tonearm.
2. Lock the tonearm on its post, push the operat-
ing slide switch to START, then rotate the platter
by hand two or three times to be sure the switch
is in “neutral” (Fig. 1).
3. Unlock the tonearm, lift it off the rest post, and
rotate the counterbalance until the tonearm is per-
fectly balanced. To raise the tonearm head, rotate
the counterbalance clockwise .. . and vice versa.
The tonearm will be perfectly balanced when
edges A on the tonearm head and B on the resting
post line up as shown in Fig. 12.
As a further confirma-
tion of perfect tonearm
balance, let the tone-
arm float freely, then
tap the chassis from
the top. The tonearm
should remain hori-
zontal, even while the
chassis vibrates. Perfect
tonearm balance is, of
course, especially im-
portant with extremely lightweight tracking.
()
Note: the counterbalance has been pre-set at a mid-
Position on its threads. If at any time in the future, you
find it too close to either end of the shaft, simply rotate
it in the opposite direction for a few turns, Then resume
with instruction 1.
Applying Stylus Force
Once the tonearm is balanced at zero, you simply
dial ‘the stylus force. The number on the direct-
reading dial 11] is accurate to within 0.1 gram.
The instructions accompanying your cartridge will
give you the range of minimum and maximum
tracking forces its manufacturer suggests.
As the tonearm of the Dual 1009F can track flaw-
lessly as low as % gram, the only limitations on
tracking are those imposed by the cartridge itself.
That is why you can use any cartridge you prefer,
including those with ultra-high compliance styli
not ordinarily recommended for use in automatic
tonearms.
Applying Tracking-Balance Control
The Dual 1009F is designed to provide continu-
ously variable Tracking-Balance Control. (See
page 6 for full explanation. )
To apply Tracking-Balance Control for the track-
ing force you have set for your cartridge, simply
rotate the Tracking-Balance dial §AJ to the same
number as on the stylus force dial.
Connection to Amplifier
(or other audio equipment)
«The red phono cable is for the left channel, the
yellow cable for the right channel. Connect to your
amplifier or other audio equipment according to
their instructions.
Connection to Power Supply
AC voltage and line frequency (cycle) require-
ments are indicated on both the outside of the car-
ton and on top of the chassis beneath the turntable
platter. Check before connecting to power supply.
Note to servicemen: The Dual can be set for either 110
VAC or 220 VAC. It can also be used with line frequency
of either 50 or 60 cycles. The 60 cycle pulley is Part Number
12X-U 20; the 50 cycle pulley is Part Number 12X-U 14.
Power Control for Amplifier Shut-Off
Your Dual 1009F is equipped with a unique pro-
*Instructions for installing on base, mounting cartridge and balancing tonearm apply for Duals purchased as
separate components. If your Dual is already mounted within a console, these installation procedures have already
been made for you. However, reading these three sections will help familiarize you with the unit.
vision for controlling the power to the amplifier, so
that the entire system can be switched on and off
automatically. by the turntable. To take advantage
of this special feature (which handles up to 3 amps),
consult your Dual dealer or a qualified serviceman,
in accordance with UL requirements.
Adjustment for Lead-In Groove
The Dual’s tonearm has been carefully set at the
factory to set down accurately in the lead-in groove
during automatic start. However, the dimensions
of some cartridges may cause the stylus to set
down either too far in or too far out. In such cases,
the necessary adjustment can be made quite simply
as follows:
1. Move record-size selector switch to 7” position.
This will expose the adjustment screw through
the opening in the chassis near the tonearm post.
2. If the stylus had touched down outside the lead-
in grooves, turn the screw clockwise (very slightly).
If the stylus had touched down on the recorded
grooves, turn the screw counter-clockwise.
(Although it is most convenient to use a 7” record,
any size record can be used to make and check the
adjustment, as once the tonearm has been cor-
rectly set for one size record, it will be correct for
all. Just be sure to set the size selector switch back
for the record size you're using if you don’t have
a7” record.)
Servicing
if your Dual 1009F ever requires servicing,
either take it to your Dual audio dealer, or ask
him for the address of the nearest Authorized
Dual Service Station. Be sure that authentic Dual
parts are used whenever replacement is neces-
sary. Always ship the Dual in its original packag-
ing, or if it has been discarded, write for special
shipping instructions.

Tonearm Pause 5
Ledge Adjustment for
Tonearm Indexing
Tonearm
Rest
(not
visible
Post
in
photo)
Auto/ Manual 8 |
Cue-Control Tonearm
Lock
Record Size
Selector
Master
2
|
7
|
Operating Tonearm Lift
Switch
and
Cartridge
Pitch
37
Holder
Lock
Control
Top/Mount 3 |
Spring Screw
Cartridge
Holder
Counterbalance
Shaft
Direct Dia!
Stylus Force
Adjust
Tonearm
Counterbalance
Speed
Selector
Tracking-Balance
Control
DUAL 1009F
AUTO/PROFESSIONAL
15
16
TURNTABLE
Spindle
single
Ply
pring
Sere
Spindle
Spring
Screw

DUAL 1009F
PRECISION DESIGN
AND ENGINEERING FEATURES
CONTINUOUSLY
VARIABLE,
DIRECT-DIAL
TRACKING-BALANCE
CONTROL™ CAnti-Skating)
What You Should Know About Skating
Skating refers to the side-thrust imparted to the
stylus from the offset angle of the tonearm head
and the friction between the stylus and the rotat-
ing record.
This causes the stylus to “skate” toward the center
of the record, thus causing increased force against
the inner groove and correspondingly less force
against the outer groove. This results in distortion,
increased wear on the inner groove and uneven
wear on the stylus itself.
Skating is actually not a serious problem with
ordinary tonearms, as their bearing friction in the
pivot is generally high enough to cancel out or
minimize the tendency to skate. Of course, bearing
friction high enough to prevent skating is also high
enough to compromise tracking performance at
the ultra-lightweight forces now made possible by
today’s finest high compliance cartridges.
Actual Forces Present at Stylus Point
(13) K — theoretical force against Sk — skating force
tonearm bearing if head = 4 _ angle of offset
were not angled head
Z — direction of force against
tonearm bearing because
of angled head
tonearm
bearing
The amount of skating force is directly measur-
able, and amounts to about 12% of tracking force.
Fig. 13 illustrates the physical principle behind
skating and the forces that cause it.
A tonearm with 2 gram tracking force will thus
have a potential skating force of .24 grams. We
say potential, since, as noted above, if a tonearm’s
bearing friction is above .24 gram, it won't skate.
The bearing friction of the Dual 1009F tonearm,
on the other hand, is lower than 0.04 gram. Thus,
Tracking-Balance Control of the same high order
of precision—and with continuously variable con-
trol—was one of the major goals and achievements
of the 1009F’s design.
Applying Tracking-Balance Control
Just as you set stylus force on the Dual with a
continuously variable direct-reading dial, so do you
set Tracking-Balance Control for that same force
(Fig. 14).
Tracking-Balance Control for Stylus Radii (in mils)
As shown by the bold-face numerals in the chart,
Tracking-Balance Control is calibrated for the
most commonly used round stylus radius (0.6 mil).
This calibration is also sufficiently accurate for
other stylus radii as well.
What’s more, for the perfectionist who wishes to
take the fullest possible advantage of the precision
Tracking-Balance Control now made possible, the
other columns indicate the adjustment to be made
for other radii from 0.4 mil to 0.8 mil, as well
as the elliptical stylus (0.2 mil x 0.9 mil).
This means that for the first time you can actually
balance stylus force on both walls of the stereo
groove!
All this is one more example of how Dual assures
you of the best possible performance from any
cartridge/stylus combination.

ft) .
4
Direction of = ;
Skating Force a e
a
4 Tracking-Balance
Direction of Control
Skating Force
These illustrations show how Tracking-Balance
Control is applied within the tonearm system of
the Dual 1009F. (A) No Tracking-Balance Con-
trol applied. (B) Tracking-Balance Control applied
by special non-fatiguing spring. Tonearm in rest
position. (C) Tonearm now in extreme center posi-
tion. Though spring is extended, Tracking-Balance
Control remains constant through the entire area
of tonearm travel, due to angle which correspond-
ingly reduces pull of the spring.
AUTO/MANUAL
CUE-CONTROL"™
Precise Stylus-to-Groove Cueing
With the Auto/Manual Cue-Control, still another
measure of flexibility and precision has been added
to the unrestricted automatic and manual play that
has long been available in all Dual automatic turn-
tables.
The Cue-Control makes it possible to pre-position
the stylus over any groove and then lower it more
smoothly and gently than would be possible by
hand.
You can also play to any point, interrupt with the
Cue-Control, and resume play where you left off.
A close look at the stylus as it descends will show
how the vertical piston action of the Cue-Control
mechanism lowers the tonearm with no side-shift
whatever, regardless of portion of the record being
played.
You will also notice how the silicon damping slows
the descent of the tonearm . . . a far more gentle
descent than would ever be possible by hand.
Using the Cue-Control
The Cue-Control has two positions: YW to lift
the tonearm, and ‘W for lowering it. (Fig. 16)
To lower the tonearm to any groove, you need
give only the lightest flick to the Cue-Control. The
descent of the tonearm is immediately taken over
by silicon damping and a piston action. Lowering
speed is 0.5 cm/second, and is unaffected by tem-
perature or humidity changes.
To raise the tonearm, on the other hand, you do
control the rate of ascent by the speed with which
you move the Cue-Control from position VW to
position W,
With Automatic Start Too!
The Cue-Control can also be used together with
automatic start for a slower-than-normal rate of
descent, as may be desired with ultra-high compli-
ance styli. Once the cycling action has placed the
tonearm over the lead-in groove and it begins to
descend, then Cue-Control takes over. The Cue-
Control itself is automatically shifted to position
XW, where it is ready to raise the tonearm at any
time during play.
Cue-Control is shown at position W, with tone-
arm supported by piston (A). When Cue-Control
is shifted to position WW, the piston is released
and permits tonearm to slowly lower to record.
At this point, the tonearm is completely disen-
gaged from the Cue-Control.

DUAL 100SF
PRECISION DESIGN
AND ENGINEERING FEATURES
DYNAMICALLY
BALANCED
TONEARM
WITH
DIRECT-DIAL
STYLUS
FORCE
ADJUST
Flawless Tracking as Low as 1/2 Gram
Not all so-called “dynamically balanced” tonearms
actually measure up to that important qualifica-
tion, as dynamic balance requires that the tone-
arm’s integral mass remain balanced at all times
when tracking.
This tonearm main-
tains its true dy-
namic balance in
all planes because
tracking force is ap-
plied at the pivot
point by along, mul-
tiple-coiled main-
spring (Fig. 18A).
The weight of the
tonearm itself re-
mains in constant
balance.
Friction-Free Pivots
The Dual 1009F’s tonearm pivot is virtually
friction-free (less than 0.04 gram) in both vertical
and horizontal planes. For its vertical movement,
the tonearm is pivoted on two hardened steel
points, each supported by precision ball bearings.
(Fig.
18)
In
the
horizontal
movement,
double
ball
bearing units are used. (Fig. 18C)
Direct-Dial Stylus Force
Tracking force is applied with the same order of
precision as used in balancing the tonearm. The
continuously variable adjustment (from 0 grams
up) is also essential with ultra-lightweight track-
ing. The readings on the dial (Fig.19) are accurate
to within 0.1 gram.
“At-Home” Demonstration of Tonearm
Balance,
Tracking
and
Low
Bearing
Friction
Among
the
final
“torture”
tests
that
each
Dual
1009F
must
pass
at
the
factory
are
some
which
you
can
easily
duplicate
at
home.
We
believe
that
you
will
find
them
both
interesting
and
impressive
demonstrations
of
the
precision
tracking
possible
with
this
truly
remarkable
instrument.
Featherlight Tripping
The
tripping
action
is
accomplished
by
a
light-
weight
glider
which
rides
freely
on
a
ball
bearing
toward
the
center
as
the
tonearm
approaches
the
run-out
grooves.
When
the
stylus
reaches
these
grooves,
the
glider
is
brought
into
featherlight
con-
tact
with
the
free-suspension
trip
switch,
and
the
automatic
trip
immediately
takes
over.
Less
than
0.4
gram
force
is
sufficient
to
activate
the
switch.
Tripping at /2 Gram
If
you
have
a
high
compliance
cartridge
and
a
new
record
with
smooth
run-out
grooves
you
can
witness
the
phenomenon
of
a
tonearm
actually
tripping
at
%
gram!
Just
set
the
stylus
force
scale
accordingly,
and
place
the
tonearm
on
the
rec-
ord
near
the
center,
just
outside
the
run-out
groove.
Then
press
the
slide
switch
to
MANUAL
and
watch
the
effortless
tripping
performance,

Tripping at “Zero”
Try this also. With the stylus force scale set at 0,
allow the tonearm to float over the record in mid-
air. Push to MANUAL to rotate the record, then blow
gently on the tonearm from the side . . . just enough
to ease it toward the center.(Fig.20) As your breath
alone moves the tonearm, it will again trip and then
float gently back. (Because it is set at 0 tracking
force, the tonearm will not descend to its resting
post. So be sure to restore the normal tracking
force for your cartridge.)
Tonearm Balance
With a 12” 33-rpm record on the platter and the
stylus force set at 1 gram, prop the Dual up as
shown in Fig. 21* at any angle up to 60°. When
you push to START, the tonearm will index and
track flawlessly, as a demonstration of its perfect
balance in all planes. (While tracking, the Dual
can be tilted even further to almost 90°.)
Vertical and Horizontal Movement
Now, without tilting the Dual itself, place a ciga-
rette or short pencil between the record and
platter to simulate the effect of a badly warped
record. Again, the tonearm will track flawlessly,
this time as a demonstration of the low friction in
the vertical pivot.
*You can actually tilt the Dual from any side except the
right, as the free action of the trip switch would then cause
it to be activated at about 20° tilt. Needless to say, the Dual
requires no leveling.
Finally, for the “piece de resistance,” test for low
friction in the horizontal pivot. To do this, place
a large-hole 7” record on the platter, but off center.
(Fig. 22) Place the tonearm on the lead-in groove
and push to MANUAL. The sight of the tonearm
swaying back and forth while tracking is indeed
startling.
ACOUSTIC FEEDBACK
ELIMINATED
The only vibrations induced upon the stylus should
be those originating
from the recorded
grooves. Any others,
such as those present
in the speakers, must
be isolated from the
stylus, or it will repeat-
edly transmit those
spurious signals
throughout the system
— as “acoustic feed-
back.”
Dual has taken extra-
ordinary care in elimi-
nating anything that would tend to induce acoustic
feedback, For example, the spring-mounted foot-
ings (Fig. 23) are internally cushioned with rubber
between spring and caps. Further, the springs them-
selves are “soft,” because the feathertouch side-to-
side action of the operating slide switches-do not
require stiff vertical resistance.
The tonearm counterbalance is also rubber-isolated
from its shaft, as you will notice when handling it.
And the motor, of course, is thoroughly insulated
against both shock and vibration. These are some
of the “inside” reasons why you will find Dual
automatic turntables in the highest quality single-
cabinet consoles that can reproduce the full fre-
quency response range without concern for acoustic
feedback.
POWERFUL, CONSTANT SPEED
CONTINUOUS-POLE™ MOTOR
‘oF,
Of entirely new design, the Dual’s powerful and
utterly quiet Continuous-Pole™ high torque motor
effortlessly brings the heavy turntable to full speed
virtually instantaneously. The rotor is dynamically
balanced in both planes. Together with the evenly
and precisely distributed poles, this eliminates at
the source, one of the major sources of rumble and
assures speed constancy.

DUAL 100SF
PRECISION DESIGN
AND ENGINEERING FEATURES
All three speeds are accurate within 0.1%, with one
to ten records. Further, voltage variations can ex-
ceed + 10% with no effect on speed whatever!
Thus the Continuous-Pole motor combines the ad-
vantages of the induction and synchronous motors.
PITCH-CONTROL™
Each of the three standard speeds ( 33, 45, 78
rpm) can be varied over a 6% range with the ver-
nier Pitch-Control(™), This opportunity to change
pitch by more than a half note is especially valu-
able to serious music listeners, students, those re-
cording onto tape, and every perfectionist.
Wherever you set the Pitch-Control, speed will
remain absolutely constant. ( You can check it your-
self with the strobe disc supplied.)
How the Pitch-Control Works
This has been achieved by a simple and foolproof
method that does not change or affect motor speed
or power in any way. The motor drive pulley (A)
has three precisely tapered sections, one for each
speed, as shown in Fig. 26. The idler wheel (B)
is positioned at one of these sections by the speed
selector switch, [J Then the idler wheel is raised
and lowered along the section by the Pitch-Control
BJ. The motor drive pulley and the idler wheel
disengage automatically after play, thus prevent-
ing any possibility of flat spots developing on
the idler.
ELEVATOR ACTION’ CHANGER
SPINDLE
The Elevator-Action changer spindle, which holds
up to ten records offers another exclusive Dual fea-
ture that protects your records against any possible
damage such as may occur from the use of pusher
arm mechanisms or offset spindles.
Fig. 27 illustrates the four steps of the Elevator-
Action. First, the entire stack rests upon a three-
pronged platform (a). When the slide switch is
pushed to sTaRT, the weight of the entire stack is
lifted off the bottom record (b), which is then re-
leased to descend to the turntable (c). The stack
now lowers (d) to await the next change cycle.
This method is foolproof with all records that con-
form to the international standards of the record
Dual Gebriider Steidinger, St.Georgen/Schwarzwald
industry as to the size and concentricity of the
center hole. (On rare occasions when a record does
not drop properly, it is most likely due to excess
label paper extending into the record hole, which
should be clean.)
Power Control for Amplifier Shut-off
Your Dual 1009F is equipped with a unique pro-
vision for controlling the power to the amplifier,
so that the entire system can be switched on and
off automatically by the turntable. To take ad-
vantage of this special feature (which handles up
to 3 amps), consult your Dual dealer or a qualified
serviceman, in accordance with UL requirements.
When used with a receiver, we suggest an external
on-off switch be included, so that the tuner section
can be used without operating the turntable.
Servicing
If your Dual 1009F ever requires servicing,
either take it to your Dual audio dealer, or ask
him for the address of the nearest Authorized
Dual Service Station. Be sure that authentic Dual
parts are used whenever replacement is neces-
sary. Always ship the Dual in its original packag-
ing, or if it has been discarded, write for special
shipping instructions.
12X - D4 Printed in Germany