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The value for the Dual ULM 60 E is 7.8. it is recommended to
carry out tuning setting before inserting the counterbalance into
the tonearm. In this case, hold the stem with one hand and turn
the scale ring with the other.
Note
If you turn the damping selector in the range of the wedge-sha-
ped marking to stop position, the tuning anti-resonator is safe-
guarded against transport damage.
tt
Raker:
+H
tf
Cartridge mass
Mounting
hard-
Stylus
pressure
Manufac-
Total
turer
Shure
V 15 tt
65
18 | 83
V151V
63 | 1,8 | 8,1
M95 ED
65
18 | 83
Ortofon | SLI5Mkil
70/15
| 85
M20E
70
)15 | 85
55 | 1,2 | 6,7
Audio-
68 | 1,2 | 8,0
Technica
6,2
18 | 80
55
18 | 73
6,2
18
| 80
7,6 | 18 | 9,4
Balancing the tonearm
Precise tonearm balancing is important, above all for cartridges
with a low stylus pressure. The tonearm need only be balanced
once. However, it is recommended to check the tonearm balance
from time to time.
The tonearm is balanced if it remains in a horizontal position
when suspended freely and if it returns to this horizontal posi-
tion if pushed upwards or downwards.
The tonearm is first of all balanced approximately by shifting
the counterbalance with the stem in the tonearm tube and then
exactly balanced by turning the front knurled wheel on the
counterbalance (1):
1. With the tonearm still locked to the tonearm post, turn the
platter a few times by hand in clockwise direction.
2. Set the stylus pressure (3) and anti-skating (4) to 0'. Un-
lock the tonearm and swivel above the tonearm rest.
18
3. If the tonearm does not return to a horizontal position on
its own, release the locking screw (2) and shift the counter-
balance with the stem until you have an approximate balan-
ce. The stem of the counterbalance should then be locked
by tightening the locking screw.
4. Subsequently
balance the tonearm exactly by turning the
front knurled wheel on the counterbalance.
5. Set the stylus pressure and anti-skating.
Setting stylus pressure
Each cartridge requires a certain stylus pressure with which op-
timum reproduction is obtained. You will find this specification
for the fitted cartridge on the enclosed data sheet.
If the tonearm has been exactly balanced, the stylus pressure
necessary for the cartridge is set by turning the stylus pressure
scale (3). The stylus pressure can be continuously set within
the range from 2 to 20 mN (0.2 - 2 g}, whereby the digits on
the scale represent the following.
1
10 mN
1g
2 =
20mN
29
A graduation mark in the range from 2 - 15 mN is analogous to
this (0.2 - 1.5 g) 1 mN (0.1 g).
The unit works reliably from a stylus pressure of 2.5 mN (0.254)
onwards.
W>il>
Anti-skating
The skating force acting upon each tonearm leads to one-sided
wear and tear of the stylus and record and can cause distorted
reproduction.
In order to balance out the skating force, a counterforce exactly
defined with regards to size and direction must be applied. The
anti-skating device (4) of your HiFi record player fulfills this
requirement.
For stylus types usual or standardized nowadays, separate set-
ting scales are available in accordance with the printed symbols:
O Setting for spherical styli.
© Setting for biradial (elliptical) styli.
CD 4 setting for playing CD 4 records with CD 4 special cartrid-
ges.
Adjustment
of the anti-skating device should be carried out
synchronously to setting of the stylus pressure: turn the anti-
skating device to the digit of the scale concerned, which cor-
responds to the adjusted stylus pressure. For example, in the
case of 10 mN (1.0 g) stylus pressure also place the anti-skating
rotary button in position 1".
The skating force is reduced by approximately 30 % in the case
of "wet" playing (playing records moistened with liquid). In
this case, it is recommended to accordingly adapt the setting.
Pitch control
4
\
Each of the standardized speeds 33 1/3 and 45 rpm can be
varied with the pitch control.
;
'
If the pitch switch (21) is switched to ON, the pitch can be
varied
—
separately
for each speed —
within the range of
+ 5.5 % with the rotary controls (20) and (22).
Contrary to most quartz-controlled record players, in the case
of your Dual record player each preselected speed in the pitch
range is exactly quartz-exact and PLL controlled.
The optoelectronic analog indication (17) shows the percentage
deviation from the rated speed (Fig. 2).
If the pitch switch (21) is in OFF position, the speed corresponds
quartz-exactly to the set rated speed, independently
of how
the rotary controls (20) and (22) are set.
Quartz-exact luminous stroboscope
The precise stroboscope marking on the platter edge is flashed
at with a quartz-exact frequency via an LED luminous element
(14). In this way, the indication is neither dependent on the
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