TW-Acustic Raven 10.5 User manual
- 3 -
User Guide
Dear customer,
thank you for choosing our TW Acustic Raven 10.5 tonearm.
The Raven 10.5 is a precision tonearm whose components are assembled
by hand in Germany. TW Acustic’s usual high level of workmanship and
outstanding sonic characteristics ensure that you will rediscover your valuab-
le vinyl collection.
To maximize the longevity and enjoyment of your Raven 10.5, we recom-
mend that you read this user guide carefully before mounting your tonearm
or setting up your cartridge.
Contents:
1. Raven 10.5 design philosophy
2. Important information
3. Description of parts and accessories
4. Mounting the Raven 10.5 on a turntable
5. Cartridge tting and adjustment
6. Connecting the tonearm cable
7. Troubleshooting
8. Technical specications
TW-ACUSTIC TONEARM RAVEN 10.5
- 2 -
- 3 -
User Guide
Dear customer,
thank you for choosing our TW Acustic Raven 10.5 tonearm.
The Raven 10.5 is a precision tonearm whose components are assembled
by hand in Germany. TW Acustic’s usual high level of workmanship and
outstanding sonic characteristics ensure that you will rediscover your valuab-
le vinyl collection.
To maximize the longevity and enjoyment of your Raven 10.5, we recom-
mend that you read this user guide carefully before mounting your tonearm
or setting up your cartridge.
Contents:
1. Raven 10.5 design philosophy
2. Important information
3. Description of parts and accessories
4. Mounting the Raven 10.5 on a turntable
5. Cartridge tting and adjustment
6. Connecting the tonearm cable
7. Troubleshooting
8. Technical specications
TW-ACUSTIC TONEARM RAVEN 10.5
- 2 -
- 4 -
Our experience, as well as the experiences of our customers worldwide,
of other manufacturers’ best tonearms, led us to the conclusion that a TW
Acustic tonearm should work with any current high end pick-up system and
should be adjustable in all the relevant parameters.
From the very beginning it was established that the concept would be a
straight, pivoted-type arm. The rigorously selected precision bearings are
ultra-precisely adjusted during the production process in order to eliminate
any interference in the pick-up process. Our chosen bearing type is funda-
mentally immune to the notorious stick and slip effect.
To keep effective mass to a minimum, the tonearm is predominantly construc-
ted from a special black-anodised aluminium alloy which intrinsically ensures
the necessary stiffness and torsional strength. The effective mass is approxi-
mately 14g, which allows partnering with the majority of currently available
MC and MM cartridges. This universal compatibility is further underlined
by the inclusion of two different polished stainless steel counterweights as
standard, allowing any cartridge with an operating weight of between 5g
and 20g to be perfectly counterbalanced.
Of course, thanks to its 4-hole ange mount, the Raven 10.5 can easily be
used with other manufacturers’ turntables. Tonearm height is adjustable with
the zero-oat VTA adjuster. This VTA adjuster, derived from that found on
our agship Raven Black Night turntable, allows adjustment of 10 mm on
the y. The headshell is not detachable, but nonetheless allows for azimuth
correction. This means that any cartridge system can be adjusted in every
parameter! The integral one-piece sonically optimised copper tonearm
cable (from the cartridge tags right through to the phono plugs) does the
rest, ensuring that the delicate signals arrive at your phono stage pure and
interference-free.
1. Raven 10.5 design philosophy
- 5 -
To set up the cartridge you will need the following additional tools that are
not included in the package: a small pair of combination or needle nose
pliers or a pair of tweezers and a stylus pressure gauge.
Always use the cueing device to lower the stylus onto the record.
Never loosen the four screws that hold the bearing cover in place. These
screws hold the bearings in position, which is carefully set by us during
assembly. Should these screws have been loosened for any reason, the arm
will have to be returned to us for readjustment.
Each tonearm is a precision instrument. Always avoid the use of excessive
force – when setting up the cartridge for example. The leverage will multiply
the force many times, which could lead to potential damage of the precision
bearing.
When mounting the tonearm always disconnect the tonearm cable phono
plugs from the preamplier’s phono inputs. Failure to do so could overdrive
the phono stage and could potentially damage your loudspeakers.
Never attempt a repair of the tonearm yourself as this will void the war-
ranty. Should problems occur that cannot be resolved by referring to the
troubleshooting guide in chapter 7 of this user guide, please immediately
contact your dealer, the authorized distributor for your country, or contact
TW Acustic Germany direct.
Avoid using any cleaning agents. Your tonearm should only be cleaned
using a soft, lint-free, lightly moistened cloth. Cleaning agents could potenti-
ally penetrate the delicate bearing and adversely affect its function.
2. Important information
- 4 -
Our experience, as well as the experiences of our customers worldwide,
of other manufacturers’ best tonearms, led us to the conclusion that a TW
Acustic tonearm should work with any current high end pick-up system and
should be adjustable in all the relevant parameters.
From the very beginning it was established that the concept would be a
straight, pivoted-type arm. The rigorously selected precision bearings are
ultra-precisely adjusted during the production process in order to eliminate
any interference in the pick-up process. Our chosen bearing type is funda-
mentally immune to the notorious stick and slip effect.
To keep effective mass to a minimum, the tonearm is predominantly construc-
ted from a special black-anodised aluminium alloy which intrinsically ensures
the necessary stiffness and torsional strength. The effective mass is approxi-
mately 14g, which allows partnering with the majority of currently available
MC and MM cartridges. This universal compatibility is further underlined
by the inclusion of two different polished stainless steel counterweights as
standard, allowing any cartridge with an operating weight of between 5g
and 20g to be perfectly counterbalanced.
Of course, thanks to its 4-hole ange mount, the Raven 10.5 can easily be
used with other manufacturers’ turntables. Tonearm height is adjustable with
the zero-oat VTA adjuster. This VTA adjuster, derived from that found on
our agship Raven Black Night turntable, allows adjustment of 10 mm on
the y. The headshell is not detachable, but nonetheless allows for azimuth
correction. This means that any cartridge system can be adjusted in every
parameter! The integral one-piece sonically optimised copper tonearm
cable (from the cartridge tags right through to the phono plugs) does the
rest, ensuring that the delicate signals arrive at your phono stage pure and
interference-free.
1. Raven 10.5 design philosophy
- 5 -
To set up the cartridge you will need the following additional tools that are
not included in the package: a small pair of combination or needle nose
pliers or a pair of tweezers and a stylus pressure gauge.
Always use the cueing device to lower the stylus onto the record.
Never loosen the four screws that hold the bearing cover in place. These
screws hold the bearings in position, which is carefully set by us during
assembly. Should these screws have been loosened for any reason, the arm
will have to be returned to us for readjustment.
Each tonearm is a precision instrument. Always avoid the use of excessive
force – when setting up the cartridge for example. The leverage will multiply
the force many times, which could lead to potential damage of the precision
bearing.
When mounting the tonearm always disconnect the tonearm cable phono
plugs from the preamplier’s phono inputs. Failure to do so could overdrive
the phono stage and could potentially damage your loudspeakers.
Never attempt a repair of the tonearm yourself as this will void the war-
ranty. Should problems occur that cannot be resolved by referring to the
troubleshooting guide in chapter 7 of this user guide, please immediately
contact your dealer, the authorized distributor for your country, or contact
TW Acustic Germany direct.
Avoid using any cleaning agents. Your tonearm should only be cleaned
using a soft, lint-free, lightly moistened cloth. Cleaning agents could potenti-
ally penetrate the delicate bearing and adversely affect its function.
2. Important information
3. Description of parts and accessories
- 7 -
4.1. Mounting on a
Raven BN, Raven AC, Raven One, Raven Two or Raven .5
NOTE: When turning the steel disc, you may notice four more Allen
screws. These hold the heightadjustable collar together. Under no
circustances should these be loosened, otherwise smooth operation of
the innitely adjustable VTA cannot be guaranteed.
4. Mounting the Raven 10.5 on a turntable
Use the optional base
with the interchangeable
inserts for the Raven
10.5 which are
available from us.
To connect the tonearm
collar with the base, turn
the uppermost, slightly
larger, steel disc with the
milled edge until you can
see right through the four
holes.
- 6 -
Tonearm mounting template
Base
Mounting holes
Insert
Tonearm alignment tool
Cleaning tissue
Allen keys
Tonearm
Tonearm collar
Counter weights
3. Description of parts and accessories
- 7 -
4.1. Mounting on a
Raven BN, Raven AC, Raven One, Raven Two or Raven .5
NOTE: When turning the steel disc, you may notice four more Allen
screws. These hold the heightadjustable collar together. Under no
circustances should these be loosened, otherwise smooth operation of
the innitely adjustable VTA cannot be guaranteed.
4. Mounting the Raven 10.5 on a turntable
Use the optional base
with the interchangeable
inserts for the Raven
10.5 which are
available from us.
To connect the tonearm
collar with the base, turn
the uppermost, slightly
larger, steel disc with the
milled edge until you can
see right through the four
holes.
- 6 -
Tonearm mounting template
Base
Mounting holes
Insert
Tonearm alignment tool
Cleaning tissue
Allen keys
Tonearm
Tonearm collar
Counter weights
- 8 -
Insert the four provided Allen screws through these holes and mount
the collar to the base using the Allen key provided. Ensure that the
grub screw that holds the tonearm in its collar remains in a position
that you can easily access later. We would recommend that the tone-
arm collar should be aligned such that this grub screw points to the
right, away from the turntable.
Align your Raven’s swiveling tonearm base using the supplied moun-
ting template, ensuring that the distance between the tonearm collar
and platter bearing matches that shown on the template. This is the
only way to ensure the correct cartridge set-up
- 9 -
4.2. Mounting on a 3rd party turntable
Should you wish to use the Raven 10.5 on a non-TW Acustic turn-
table, provide your turntable’s manufacturer with the measurements
(attached) of the collar including details of all drilled holes. He should
then be able to supply a suitable base for the Raven 10.5.
Should you wish to machine your own base using the supplied tem-
plate, please ensure that every measurement precisely matches our
template’s measurements, otherwise you may have problems with
mounting, and moreover, the geometrically correct adjustment of your
cartridge.
As long as the tonearm collar is mounted at the correct distance from
the platter bearing shaft, adjusting the tonearm will be exactly the
same as it would be if the arm were mounted on a TW Acustic turnta-
ble.
First ensure that the VTA set screw on the side does not protrude into
the collar shaft, as this will lead to a slight tilting or wedging of the
arm pillar as it is inserted. The VTA ne adjustment should initially be
set such that there is an approximately equal amount of free space
above and below the grubscrew. This is achieved by turning the
milled-edged VTA adjustment disc. Now feed the arm (tonearm cable
rst) into the collar from above. As you do so, orient the boom that
holds the arm lift mechanism such that it points directly forward. This
ensures that when the arm is in its rest position, the armtube is sufci-
ently far enough away from the platter to minimize the risk of cart-
ridge damage when changing records.
Grub screw
- 8 -
Insert the four provided Allen screws through these holes and mount
the collar to the base using the Allen key provided. Ensure that the
grub screw that holds the tonearm in its collar remains in a position
that you can easily access later. We would recommend that the tone-
arm collar should be aligned such that this grub screw points to the
right, away from the turntable.
Align your Raven’s swiveling tonearm base using the supplied moun-
ting template, ensuring that the distance between the tonearm collar
and platter bearing matches that shown on the template. This is the
only way to ensure the correct cartridge set-up
- 9 -
4.2. Mounting on a 3rd party turntable
Should you wish to use the Raven 10.5 on a non-TW Acustic turn-
table, provide your turntable’s manufacturer with the measurements
(attached) of the collar including details of all drilled holes. He should
then be able to supply a suitable base for the Raven 10.5.
Should you wish to machine your own base using the supplied tem-
plate, please ensure that every measurement precisely matches our
template’s measurements, otherwise you may have problems with
mounting, and moreover, the geometrically correct adjustment of your
cartridge.
As long as the tonearm collar is mounted at the correct distance from
the platter bearing shaft, adjusting the tonearm will be exactly the
same as it would be if the arm were mounted on a TW Acustic turnta-
ble.
First ensure that the VTA set screw on the side does not protrude into
the collar shaft, as this will lead to a slight tilting or wedging of the
arm pillar as it is inserted. The VTA ne adjustment should initially be
set such that there is an approximately equal amount of free space
above and below the grubscrew. This is achieved by turning the
milled-edged VTA adjustment disc. Now feed the arm (tonearm cable
rst) into the collar from above. As you do so, orient the boom that
holds the arm lift mechanism such that it points directly forward. This
ensures that when the arm is in its rest position, the armtube is sufci-
ently far enough away from the platter to minimize the risk of cart-
ridge damage when changing records.
Grub screw
- 10 -
When carrying out a rough preadjustment of the VTA, attention should
be paid to the distance between the tonearm base and the top
surface of the platter. If you are using a Raven turntable, the distance
between the black-anodised underside of the arm lift boom and the
stainless steel collar should be between 4 and 6 mm.
- 11 -
During cartridge mounting the counterweight should not be attached. It is
also advisable to raise the cueing lever and to keep the stylus cover tted.
The arm cable should not be connected to the phono stage.
NOTE: It is especially advisable when tting a cartridge to avoid any use of
excessive force. ‘Fingertight’ is more than sufcient for securing a cartridge
to a headshell!
5.1. Adjusting the arm lift assembly
When setting up your cartridge, you may notice that the tonearm
either doesn’t sink low enough (the stylus fails to make contact with
the record surface), or that, despite the cueing arm being in its highest
position, the tonearm does not lift. In either case you should adjust the
height of the arm lift assembly and, if appropriate, the orientation of
the lift platform.
To adjust the height of the arm lift mechanism, loosen the lateral set
screw in the arm lift boom and set the height to suit your particular
turntable. When the cueing lever is in the ‘down’ position, there
should be approximately 1 mm free space between the armtube and
the lift platform.
Potentially, you may also have to adjust the position of the cushioned
lift platform. To do this, use the correct size Allen key to loosen the
Allen screw (visible from above) and rotate the lift platform. The end
of the lift platform should be approximately 1–2 mm away from the
bearing housing when the tonearm is in the rest position. Only in this
way can you be sure that the arm can still be raised when the arm
is in the runout groove (or further). Following successful adjustment,
retighten all screws “nger tight”.
5. Setting up a cartridge on the Raven 10.5
Grub screw
Distance 4-6mm
- 10 -
When carrying out a rough preadjustment of the VTA, attention should
be paid to the distance between the tonearm base and the top
surface of the platter. If you are using a Raven turntable, the distance
between the black-anodised underside of the arm lift boom and the
stainless steel collar should be between 4 and 6 mm.
- 11 -
During cartridge mounting the counterweight should not be attached. It is
also advisable to raise the cueing lever and to keep the stylus cover tted.
The arm cable should not be connected to the phono stage.
NOTE: It is especially advisable when tting a cartridge to avoid any use of
excessive force. ‘Fingertight’ is more than sufcient for securing a cartridge
to a headshell!
5.1. Adjusting the arm lift assembly
When setting up your cartridge, you may notice that the tonearm
either doesn’t sink low enough (the stylus fails to make contact with
the record surface), or that, despite the cueing arm being in its highest
position, the tonearm does not lift. In either case you should adjust the
height of the arm lift assembly and, if appropriate, the orientation of
the lift platform.
To adjust the height of the arm lift mechanism, loosen the lateral set
screw in the arm lift boom and set the height to suit your particular
turntable. When the cueing lever is in the ‘down’ position, there
should be approximately 1 mm free space between the armtube and
the lift platform.
Potentially, you may also have to adjust the position of the cushioned
lift platform. To do this, use the correct size Allen key to loosen the
Allen screw (visible from above) and rotate the lift platform. The end
of the lift platform should be approximately 1–2 mm away from the
bearing housing when the tonearm is in the rest position. Only in this
way can you be sure that the arm can still be raised when the arm
is in the runout groove (or further). Following successful adjustment,
retighten all screws “nger tight”.
5. Setting up a cartridge on the Raven 10.5
Grub screw
Distance 4-6mm
- 12 - - 13 -
Be careful not to pull the cable ends too far out of the armtube.
Finally, afx the cartridge body to the headshell using the screws
supplied with your cartridge.
NOTE: Please ensure that you use the clear plastic shims that came
with your cartridge. Failure to do so may damage the anodized layer
on the headshell, which could make setting up of other cartridges
difcult in future.
Initially the screws that hold the cartridge in the headshell should
only be done up gently, such that the cartridge can be moved in the
headshell without much force being applied.
5.3. Adjusting tracking force
Now attach the correct counterweight for your cartridge to the threa-
ded end of the armtube. Included are three counterweights of diffe-
ring weights. See the documentation that came with your cartridge
for the cartridge weight. Add approximately 1 g for the xing screws
and choose the correct counterweight with the help of the following
table:
[Figure 10:] Counterweight, with arrows indicating direction of redu-
cing/increasing tracking force.
Counterweight Cartridge weight
small Approx. 4 – 10 g
medium Approx. 8 – 14 g
large Approx. 12 – 20 g
Colour Connection
red Right channel, signal
green (or black) Right channel, ground
white Left channel, signal
blue Left channel, ground
Check/adjust correct height and angle
Grub screw
5.2. Fitting and connecting the cartridge to the headshell
First connect the headshell wires that come out of the front of the
tonearm to the relevant cartridge pins. It is preferable to use a pair of
tweezers or combination/needle nose pliers. The plug marked with a
black heatshrink sleeve is the green connection (right channel ground).
The international colour coding scheme is as follows:
- 12 - - 13 -
Be careful not to pull the cable ends too far out of the armtube.
Finally, afx the cartridge body to the headshell using the screws
supplied with your cartridge.
NOTE: Please ensure that you use the clear plastic shims that came
with your cartridge. Failure to do so may damage the anodized layer
on the headshell, which could make setting up of other cartridges
difcult in future.
Initially the screws that hold the cartridge in the headshell should
only be done up gently, such that the cartridge can be moved in the
headshell without much force being applied.
5.3. Adjusting tracking force
Now attach the correct counterweight for your cartridge to the threa-
ded end of the armtube. Included are three counterweights of diffe-
ring weights. See the documentation that came with your cartridge
for the cartridge weight. Add approximately 1 g for the xing screws
and choose the correct counterweight with the help of the following
table:
[Figure 10:] Counterweight, with arrows indicating direction of redu-
cing/increasing tracking force.
Counterweight Cartridge weight
small Approx. 4 – 10 g
medium Approx. 8 – 14 g
large Approx. 12 – 20 g
Colour Connection
red Right channel, signal
green (or black) Right channel, ground
white Left channel, signal
blue Left channel, ground
Check/adjust correct height and angle
Grub screw
5.2. Fitting and connecting the cartridge to the headshell
First connect the headshell wires that come out of the front of the
tonearm to the relevant cartridge pins. It is preferable to use a pair of
tweezers or combination/needle nose pliers. The plug marked with a
black heatshrink sleeve is the green connection (right channel ground).
The international colour coding scheme is as follows:
- 14 -
NOTE: As it is preferable for the pick-up process (especially with war-
ped records) that the moving mass is kept to a minimum, if in doubt it
is advisable to use the heavier counterweight, which in turn lies closer
to the bearing pivot, reducing its moment of inertia thereby reducing
the effect on the pick-up process.
Screw the counterweight approximately half way on to the armtube
thread and carefully (!) measure the tracking force with a stylus pres-
sure gauge. If the tracking force is too high according to the cartridge
manufacturer’s recommendation, turn the counterweight so that it
moves further toward the end of the armtube thread. If the tracking
force is found to be too low, move the counterweight nearer to the
Raven 10.5’s pivot bearing. Thanks to the ne thread, the tracking
force can be very accurately adjusted.
NOTE: Most manufacturers specify a tracking weight range for their
cartridges. Particularly for new, not yet run-in cartridges, it is advisab-
le to use the maximum recommended tracking force. Once the cart-
ridge is run in, or in generally warm climates/long periods of warm
weather, the tracking force can be reduced by 1–2 mN (approx.
0.1–0.2 g).
5.4. Cartridge alignment (overhang and offset angle)
Lay the supplied alignment gauge template on the platter. Pivot the
tonearm and cartridge to the inner point ‘L’ (Loefgren B null point) and
gently lower the stylus onto exactly this point. When viewed from
above, the front edge of the cartridge housing should run parallel to
the line on the alignment gauge. If it does not, slide the cartridge in
the headshell slots until it runs parallel to the line shown on the gauge.
- 15 -
Once the cartridge is parallel to line at the inner null point, check
the adjustment at the outer null point. If the tonearm is mounted at the
correct distance from the platter bearing, no more adjustment should
be necessary and the cartridge is perfectly aligned.
5.5. VTA adjustment
Lay an LP of normal weight vinyl on the platter and lower the stylus
onto the record as far inward as possible. The straight line laser-et-
ched onto the armtube should run parallel to the surface of the record.
If necessary this can also be checked with a set square. Should the
line not run parallel to the record surface, adjust the tonearm height
(VTA) by turning the milled-edge steel VTA adjuster disc until the line
and the record surface are parallel. This may be done during play-
back ‘on-the-y’.
NOTE: Some cartridges require a setting which is not parallel to the
armtube due to cantilever angle. In this case, the correct position can
be determined by ear. Often, a set-up with the end of the tonearm
higher than the headshell causes the high frequencies to be accentu-
ated, resulting in a bright, fatiguing presentation. In contrast, setting
the VTA too low will cause the low frequencies to be accentuated,
resulting in a boomy, sluggish presentation. When top end and bass
reproduction appear tonally balanced (locking-in the sound) you have
found the right position.
parallel milled-edge steel disc
- 14 -
NOTE: As it is preferable for the pick-up process (especially with war-
ped records) that the moving mass is kept to a minimum, if in doubt it
is advisable to use the heavier counterweight, which in turn lies closer
to the bearing pivot, reducing its moment of inertia thereby reducing
the effect on the pick-up process.
Screw the counterweight approximately half way on to the armtube
thread and carefully (!) measure the tracking force with a stylus pres-
sure gauge. If the tracking force is too high according to the cartridge
manufacturer’s recommendation, turn the counterweight so that it
moves further toward the end of the armtube thread. If the tracking
force is found to be too low, move the counterweight nearer to the
Raven 10.5’s pivot bearing. Thanks to the ne thread, the tracking
force can be very accurately adjusted.
NOTE: Most manufacturers specify a tracking weight range for their
cartridges. Particularly for new, not yet run-in cartridges, it is advisab-
le to use the maximum recommended tracking force. Once the cart-
ridge is run in, or in generally warm climates/long periods of warm
weather, the tracking force can be reduced by 1–2 mN (approx.
0.1–0.2 g).
5.4. Cartridge alignment (overhang and offset angle)
Lay the supplied alignment gauge template on the platter. Pivot the
tonearm and cartridge to the inner point ‘L’ (Loefgren B null point) and
gently lower the stylus onto exactly this point. When viewed from
above, the front edge of the cartridge housing should run parallel to
the line on the alignment gauge. If it does not, slide the cartridge in
the headshell slots until it runs parallel to the line shown on the gauge.
- 15 -
Once the cartridge is parallel to line at the inner null point, check
the adjustment at the outer null point. If the tonearm is mounted at the
correct distance from the platter bearing, no more adjustment should
be necessary and the cartridge is perfectly aligned.
5.5. VTA adjustment
Lay an LP of normal weight vinyl on the platter and lower the stylus
onto the record as far inward as possible. The straight line laser-et-
ched onto the armtube should run parallel to the surface of the record.
If necessary this can also be checked with a set square. Should the
line not run parallel to the record surface, adjust the tonearm height
(VTA) by turning the milled-edge steel VTA adjuster disc until the line
and the record surface are parallel. This may be done during play-
back ‘on-the-y’.
NOTE: Some cartridges require a setting which is not parallel to the
armtube due to cantilever angle. In this case, the correct position can
be determined by ear. Often, a set-up with the end of the tonearm
higher than the headshell causes the high frequencies to be accentu-
ated, resulting in a bright, fatiguing presentation. In contrast, setting
the VTA too low will cause the low frequencies to be accentuated,
resulting in a boomy, sluggish presentation. When top end and bass
reproduction appear tonally balanced (locking-in the sound) you have
found the right position.
parallel milled-edge steel disc
- 16 -
5.6. Anti-skate adjustment
On the Raven 10.5 the anti-skate is achieved magnetically (and there-
fore mechanically contactless). The closer the magnet in the anti-skate
adjustment screw is to the bearing assembly, the greater the anti-
skating force. If the magnet is ush with its holder, anti-skating force
is practically zero. With the adjustment screw halfway in, the normal
force of 1.5 g is applied. When screwed all the way in, a force of
approximately 2.5 g is achieved.
As skating force, which tends to draw the tonearm/cartridge towards
the centre of the record, is dependent on so many factors (such as
tracking force, stylus prole, offset angle, displacement in the groove
- 17 -
etc), and varies continuously across the surface of the record, it is
difcult to combat fully and can only be approximately compensated
for. We recommend the following tried and tested method:
Start by setting the anti-skate to a medium position (screw halfway
in), put a record with a long runout area on the platter and lower the
stylus onto a smooth, unmodulated area near the label. If the anti-
skate is correct, the diamond will stay in the unmodulated area until
it is ‘caught’ by the runout groove. If there is insufcient anti-skate, the
arm will move rapidly towards the label; too much and the arm will
be pulled outward.
When you have found the right position, you can satisfy yourself that
it is right by ear. Well-controlled female vocals should appear well-
dened and appear to come from precisely in the middle of the
soundstage. Too much anti-skate will make the voice appear to move
to the right, too little and the voice will wander to the left.
5.7. Azimuth adjustment
- adjustable range +
The Raven 10.5 allows the user to
adjust the cartridge azimuth so that
the stylus is exactly perpendicular
to the record surface. This is achie-
ved by slightly loosening the Allen
screw that clamps the headshell to
the armtube. The headshell can then
be gently rotated until the azimuth
is correct. Finally, gently tighten the
Allen screw to secure the headshell
in position, being careful to avoid
the use of excessive force.
parallel
- 16 -
5.6. Anti-skate adjustment
On the Raven 10.5 the anti-skate is achieved magnetically (and there-
fore mechanically contactless). The closer the magnet in the anti-skate
adjustment screw is to the bearing assembly, the greater the anti-
skating force. If the magnet is ush with its holder, anti-skating force
is practically zero. With the adjustment screw halfway in, the normal
force of 1.5 g is applied. When screwed all the way in, a force of
approximately 2.5 g is achieved.
As skating force, which tends to draw the tonearm/cartridge towards
the centre of the record, is dependent on so many factors (such as
tracking force, stylus prole, offset angle, displacement in the groove
- 17 -
etc), and varies continuously across the surface of the record, it is
difcult to combat fully and can only be approximately compensated
for. We recommend the following tried and tested method:
Start by setting the anti-skate to a medium position (screw halfway
in), put a record with a long runout area on the platter and lower the
stylus onto a smooth, unmodulated area near the label. If the anti-
skate is correct, the diamond will stay in the unmodulated area until
it is ‘caught’ by the runout groove. If there is insufcient anti-skate, the
arm will move rapidly towards the label; too much and the arm will
be pulled outward.
When you have found the right position, you can satisfy yourself that
it is right by ear. Well-controlled female vocals should appear well-
dened and appear to come from precisely in the middle of the
soundstage. Too much anti-skate will make the voice appear to move
to the right, too little and the voice will wander to the left.
5.7. Azimuth adjustment
- adjustable range +
The Raven 10.5 allows the user to
adjust the cartridge azimuth so that
the stylus is exactly perpendicular
to the record surface. This is achie-
ved by slightly loosening the Allen
screw that clamps the headshell to
the armtube. The headshell can then
be gently rotated until the azimuth
is correct. Finally, gently tighten the
Allen screw to secure the headshell
in position, being careful to avoid
the use of excessive force.
parallel
- 18 -
Finally, connect the tonearm cable to your phono stage or the phono
inputs of your amplier. The red mark indicates the right channel, the
black, left. Don’t forget to connect the earth lead to the relevant con-
nector on your amplier. Now sit back and enjoy the music!
No sound is heard
Check that the cartridge is connected to the tonearm (chapter 5.2);
also check that the tonearm lead is connected to your amplier (chap-
ter 6). Where relevant, check all other connections (e.g. from the
amplier to the speakers) Is everything switched on?
Left and right channels are inverted
Check that the cartridge is correctly connected to the tonearm in
accordance with the colour coding (see chapter 5.2); also check that
the tonearm lead is connected to your amplier the right way round
(chapter 6).
There is an annoying hum behind the music.
Check that the earth lead is connected to your amp/preamp.
Soundstaging is vague, there is no focus and bass reproduction is poor.
(Out of phase).
Check the connections at the headshell to see whether the red and green or
the white and blue connections are reversed.
The tonearm cannot be raised at the end of the record.
Adjust the arm lift assembly in accordance with chapter 5.1.
The stylus does not reach the record despite the cueing lever being in the
down’ position.
Adjust the arm lift assembly in accordance with chapter 5.1.
6. Connecting the tonearm cable
7. Troubleshooting guide
8. Technical specications
- 19 -
NOTE: The following problems can often occur as a result of poorly
pressed or damaged records and do not necessarily indicate a mal-
function of the tonearm. They may also indicate a damaged or worn
cartridge.
Slight distortion audible across the entire LP
Check tracking force is correct for your cartridge
Noticeable levels of distortion, particularly towards the centre (label)
Check the cartridge alignment (chapter 5 et seq.)
Distortion on the left channel in loud passages
Excessive anti-skating force – reduce (chapter 5.6)
Distortion on the right channel in loud passages
Insufcient anti-skating force – increase (chapter 5.6)
Effective length 267 mm (approx. 10.5 inch)
Mounting distance
Mounting aperture
Mounting hole dimensions
251.2 mm
45.5 mm
51 mm 4 x 90° 3.2 mm or M3 thread
Overhang 15.8 mm
Offset angle 20.5 °
Geometry Loefgren B drawn on IEC radii
Null points 70 mm (inner), 117 mm (outer)
Effective mass approx. 14 g
Tonearm weight
Tonearm weight including VTA base
500 g
1 kg
- 18 -
Finally, connect the tonearm cable to your phono stage or the phono
inputs of your amplier. The red mark indicates the right channel, the
black, left. Don’t forget to connect the earth lead to the relevant con-
nector on your amplier. Now sit back and enjoy the music!
No sound is heard
Check that the cartridge is connected to the tonearm (chapter 5.2);
also check that the tonearm lead is connected to your amplier (chap-
ter 6). Where relevant, check all other connections (e.g. from the
amplier to the speakers) Is everything switched on?
Left and right channels are inverted
Check that the cartridge is correctly connected to the tonearm in
accordance with the colour coding (see chapter 5.2); also check that
the tonearm lead is connected to your amplier the right way round
(chapter 6).
There is an annoying hum behind the music.
Check that the earth lead is connected to your amp/preamp.
Soundstaging is vague, there is no focus and bass reproduction is poor.
(Out of phase).
Check the connections at the headshell to see whether the red and green or
the white and blue connections are reversed.
The tonearm cannot be raised at the end of the record.
Adjust the arm lift assembly in accordance with chapter 5.1.
The stylus does not reach the record despite the cueing lever being in the
down’ position.
Adjust the arm lift assembly in accordance with chapter 5.1.
6. Connecting the tonearm cable
7. Troubleshooting guide
8. Technical specications
- 19 -
NOTE: The following problems can often occur as a result of poorly
pressed or damaged records and do not necessarily indicate a mal-
function of the tonearm. They may also indicate a damaged or worn
cartridge.
Slight distortion audible across the entire LP
Check tracking force is correct for your cartridge
Noticeable levels of distortion, particularly towards the centre (label)
Check the cartridge alignment (chapter 5 et seq.)
Distortion on the left channel in loud passages
Excessive anti-skating force – reduce (chapter 5.6)
Distortion on the right channel in loud passages
Insufcient anti-skating force – increase (chapter 5.6)
Effective length 267 mm (approx. 10.5 inch)
Mounting distance
Mounting aperture
Mounting hole dimensions
251.2 mm
45.5 mm
51 mm 4 x 90° 3.2 mm or M3 thread
Overhang 15.8 mm
Offset angle 20.5 °
Geometry Loefgren B drawn on IEC radii
Null points 70 mm (inner), 117 mm (outer)
Effective mass approx. 14 g
Tonearm weight
Tonearm weight including VTA base
500 g
1 kg
www.tw-acustic.de
Precision Made in Germany
Harkortstraße 62 f .D-44652 Herne
Telefon 02325/ 668484 2 .Fax 02325/668483
email: [email protected]
web: www.tw-acustic.com
Table of contents
Popular Turntable manuals by other brands
Acoustic Signature
Acoustic Signature INVICTUS jr instruction manual
Pioneer
Pioneer PL-05 Service manual
Marley
Marley EM-JT002 quick start guide
Rotel
Rotel RP-5300 owner's manual
Pro-Ject Audio Systems
Pro-Ject Audio Systems Essential II/Phono USB Instructions for use
LinearX
LinearX LT360 Programming manual