Dual 430 - Page 12

This unit is equipped with the Dual stereo ceramic pick-up
cartridge CDS 650, which can be supplied ex factory with
one of the following styli:
DN 6: 2 x 0.6 mil sapphire needle
for microgroove and stereo records
DN 65: 0.6 mil diamond needle
for microgroove and stereo records
DN 66: 0.6 mil sapphire needle
for microgroove and stereo records
Stylus type (e. g. DN 6) is shown on needle holder.
To place the stylus request in playing position, turn needle
by 180°.
The snap-on mounting of this pick-up cartridge on the tonearm
eliminates all mounting hardware. The snap-on mounting secures
perfect geometrical alignment of the stylus tip.
Technical data
Recommended stylus
pressure: 459(4-59)
Frequency range: 20 c.p.s. to 16 k.c.p.s.
Minimum 65 mV / 1 cin/sec per
channel at 1 k.c.p.s.
(1 M 92/200 pF)
Output:
Output difference
between channels: Maximum 2 dB at 1 k.c.p.s.
Isolation between
channels: 20 dB at 2 k.c.p.s.
Horizontal 6 x 10-8 cm/dyn
Vertical 4,5 x 10-6 cm/dyn
Compliance:
AC resistance: per crystal element
approx. 160 kQ at 1.000 c.p.s.
Net weight: 3.89
CDS 650
Stereo frequency response, cut-off resistance 1 MY
200 pF, Measuring record DIN 45541, DG recording
curve = DIN 45 547, Stylus force 4 g., record player, Dual
1210, 0 dB = min 65 mV/crhs -1 at 45°, cutting angle =
206 €
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derived trom transmitted voltage
30
2 4 6810 2 4680 2 4680 2
Fig. 1
Additional information sheet for the operating manual
Dual 421
Dual 430
Changing the pick-up cartridge
To remove the complete pick-up cartridge
disengage the tonearm and hold in position
with the left hand. Take pick-up cartridge
between thumb and forefinger of the right
hand and with the thumb of the left hand
push the catch on the tonearm head to the
rear (Fig. 2).
The pick-up cartridge is released from the
mounting plate by pressing downwards to
the rear (Fig. 3).
Mounting the pick-up cartridge
To insert in the mounting plate grip pick-up
cartridge between thumb and forefinger of
the right hand and place the guide bar on the
pick-up cartridge in the wide recess in the
mounting plate provided for the purpose.
With the pick-up cartridge in this position
push gently upwards to the rear until enga-
gement takes place (Fig. 3). |
Insert complete pick-up cartridge upwards in
the pick-up head with the contact pins
towards the tonearm tube and press upwards
at the front. The tonearm should be held
firmly in position this is done.
Changing the stylus
After having removed the pick-up cartridge,
turn the needle bearing by 90° as shown in
fig. 4. Now the needle can be changed
quite easily.
Insert the needle in the same position and
make sure that the needle holder is pro-
perly seated in the cut-outs of the cartridge.
Stylus
The stylus is subject to wear during use. We
recommend that the sapphire stylus should
be checked after playing about 30 hours
and a diamond stylus should be checked
after playing about 300 hours. Your authori-
zed dealer will be glad to check your styius
free of charge.
A worn out or damaged stylus chisels the
modulations in the grooves and damages the
record. Replace the worn out stylus with
one that exactly meets the cartridge’s speci-
fications, Imitations will result in a loss in
sound quality and will increase the damage
to your records,
Please notice that the stylus carrier with a
sapphire or diamond stylus, due to size, is
very sensitive to shocks, vibrations or sudden
impacts. To have your stylus changed take
the complete cartridge (with stylus) and
have it done by your nearest authorized
dealer.
Fig. 3
Fig. 4