Dual shure m75 owners manual

Page 1

Information on the pick-up cartridge in your automatic
turntable

M 75 Type D

This unit is equipped with the Shure M 75 Type D hi-ii stereo magnetic pickup
cartridge. The standard 0.6 mil diamond stylus permits tracking of stereo-and
LP records. For 78 RPM records a replacement stylus assembly Dual DN 321 ls

Technical data
Stylus:

DN 325 (SHURE N 71 M-B)
0.6 i 0.1 mil spherical

diamond stylus for micro-
groove and stereo records

Color coding beige
Recommended stylus

pressure: 2.5 g (2 - 3 gl
Frequency range: 20 c.p.s. to 20 k.c.p.s.
Output: > 0.8 mV/l chn/sec per

channel at l k.c.p.s.
Output difference

between channels: Maximum 2 dB at l k.c.o.s.

isolation
between channels: Minimum 20 dB at l k.c.p.s.
Compliance: Horizontal 20 x 10-6 cm/dyn

Vertical 20 x 106 cm/dyn

lntermodulation A! 2.5 g stylus pressure, 8 cm/sec

distortion (FlMl: velocity, < i %

Net weight: 5.5 p

End resistance: 47 kOhm

impedance: 5.5 kOhm at 1 k.c.p.s.
Ohmic resistance: 1.2 kOhm
inductance: 850 rnH

DN 321 (SHURE N 75 . Ell
Color coding: green

2.5 mil diamond stylus

for 78 rpm-records
Tracking pressure: 3 p

Special accessory:

Frequency response, Stereo and crosstalk damping, measured
wrth equalizer pre-ampliiier Dual TVV 47

Test record: DIN 41541irecording curve 3180 - 318 7 75 us)
Tracking pressure 2.5 g, record player: Dual 1229

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1000: Alans donor:

available as an optional accessory.

The snap-on mounting of this Dual pick-up
cartridge on the cartridge holder eliminates
fitment with screws, spacing rollers and nuts.
The snap-on mounting secures correct geome-
trical alignment oi the stylus tip.

Removal of pickvup cartridge

Remove complete pick-up head from the tone-
arm and remove slip-on connectors from con-
tact prongs oi cartridge. Hold the mounting
plate With one hand and pull down cartridge.
The snap-on mounting of the cartridge on the
Cartridge plate is shown in Fig. 3.

Changing the stylus

The stylus is subject to natural wear as a
result of playback. We recommend therefore
checking the diamond stylus of this pick-up
cartridge alter approximately 300 playing
hours. Your specialist dealer will be pleaSEd
to do this ior you free of charge. Worn or
damaged (splintered) styli will chisel the mo»
dulation out of the grooves and destroy your
records.

For replacement only use the original stylus
type stated above. lmitation styli will cause
perceptible loss in quality and increased re-
cord wear.

Please notice that the needle carrier with a
diamond stylus, due to size, is very sensitive
to shocks, vibrations or sudden impacts. In
order to have your stylus changed take the
complete cartridge (with stylus) and have it
done by your nearest authorized dealer.

Figure 4 shows the stylus assembly. To change
the needle, raise the needle protector and
remove in the direction as shown,

Pick-up cartridges With 1/2" standard titimg
dimensions can be fitted on the cartridge
holder with conventional screws, spacmg role
iers and nuts.