Shure STEREO DYNETIC M91ED Manual

222
HARTREY
AVE..
EVANSTON,
IL.
60204 U.S.A.
MICROPHONES AND ELECTRONIC COMPONENTS
I
"
"
- - - -
TWX:
910-231-0048
TELEX:
72.4381
THE PREMIER FAMILY OF STEREO SOUND REPRODUCERS
STEREO
D Y N E T I C @
M91ED
PHONOGRAPH CARTRIDGE
CARTRIDGE AND STYLI SPECIFICATIONS
toptional 78 rpm Stylus:
Set amplifier to "MONO" o r "A-kB."
*Output voltages given for stereo cut record. For M O N O cut record,
output voltage at both left channel and right channel cartridge terminals
w i l l be 71% of figures above.
**Tracking forces greater than maximum indicated should not be used.
NET WEIGHT: 5.8 grams
INDUCTANCE: 720 millihenries
DC RESISTANCE: 630 ohms
OPTIMUM LOAD: 47,000 ohms resistance in parallel with 400 to 500 pico-
farads total capacitance per channel. Load resistance can be up to 70,000
ohms with almost no audible change in frequency response. Total capaci-
tance includes both the tone arm wiring and amplifier input circuit.
FOUR-CHANNEL: This Stereo Dynetic@ cartridge is compatible with all
four-channel matrix systems.
MONOPHONIC OPERATION: Set function switch on amplifier to "MONO"
or "A+B." If amplifier is not equipped with this switch, connect left and
right channels in parallel.
CONNECTIONS (see Figure 1): Right "hot" lead (usually red) to "R," right
gtound (usually green) to "RG." Left "hot" lead (usually white) to "L," left
ground (usually blue) to "LC." If metal head is causing ground loop hum,
remove the ground tab. The metallic cartridge shield is disconnected from
the right channel ground by the removal of the ground tab.
CAUTION: D o not make solder
connection to cartridge terminals.
: % ' N NEL
STYLUS REPLACEMENT (see Fig-
ure 2): Grasp molded housing of
stylus and gently pull forward out
of cartridge. Insert replacement
~EGNEL
stylus into socket and press until
$;",",'iAL
housing mates with cartridge case.
MOUNTING r12.7 mm (1/2 in.)
mounting centers]:
Mounting screws are provided.
1. Remove stylus guard and stylus
(see Stylus Replacement).
2. Connect leads to cartridge (see
Figure 1).
3. Lay cartridge in shell and align
mounting holes on side of car-
tridge with holes or threads in
shell. Follow turntable manu-
facturer's instructions to mount
cartridge in tone arm or plug-in
shell.
4. Reinsert stylus (see Stylus Re-
placement). FIGURE 2
N91ED
5 X
l g p
(.OW2 X
.0007 in.)
Birad~al
(Elliptical)
N91-3t
64 microns
C.0025 in.)
Spher~cal
RECOMMENDED STYLUS CLEANING: Use
a
camel's hair brush (No. 2 size
or smaller), trimmed to approximately 6 mm (1/4 in.), dipped in alcohol or
an alcohol-distilled water solution. Commercial cleaning solutions may cause
stylus damage or corrosion. Always brush stylus from back to front; never
brush or wipe stylus from front to back or side to side.
TO PRESERVE STYLUS LIFE:
1. Follow turntable or tone arm instructions when adjust~ng antiskating
force.
2. D o not handle the tone arm while i t is in operation since this may
cause the arm to sweep across the record.
3. If i t is necessary to manually place the tone arm in the record groove
while turntable is rotating, release i t as soon as the stylus engages the
record groove.
4. Correct improper set-down adjustment or malfunction of the turntable
changing mechanism to prevent the stylus from striking the edge of the
turntable or record. Do not stack more records than turntable manufac-
turer recommends.
5. Take care to properly insert the stylus into the cartridge assembly and
the cartridge and shell assembly into the tone arm receptacle.
6. Use proper vertical tracking force setting for each cartridge.
7. D o not use badly warped, cracked or imperfect records.
8. When dusting the turntable protect the stylus with the stylus guard.
SPECIAL NOTE:
To maintain the original performance standards of your
cartridge, be certain that any replacement stylus you buy bears the follow-
ing certification on the package: "This Stereo Dynetic@ stylus is precision
manufactured by Shure Brothers Inc." AVOID INFERIOR IMITATIONS. THEY
WILL SERIOUSLY DEGRADE THE PERFORMANCE OF YOUR CARTRIDGE.
Yellow
Dark
Green
ALL GENUINE "DYNETICQ" STYLI ARE MANUFACTURED BY SHURE
BROTHERS INC. LOOK FOR THE NAME SHURE O N THE STYLUS GRIP.
For more information on your Shure stylus, write for booklet: "A Visit t o
. .
the Small World of a ~ t y l u s . "
FULL ONE-YEAR WARRANTY: Shure Brothers lncorporated ("Shure"),
222 Hartrey Avenue, Evanston, Illinois 60204, warrants to the owner of this
product that it w i l l be free, in normal use, of any defects in workmanship
and materials for a period of one year from date of purchase. You should
retain proof of date of purchase. Shure is not liable for any consequential
damages. If t h ~ s Shure product has any defects as described above, care-
fully repack the unit and return i t prepaid to:
Shure Brothers lncorporated
Attention: Serv~ce Department
1501 West Shure Drive
Arlington Heights, l l l i n o ~ s 60004
If you are not in the United States, return the unit to your dealer or
Authorized Service Center for repair. The unit will be repaired or replaced
and returned to you promptly, and i t it cannot be repaired or replaced,
you may elect to receive a refund. This warranty does not include stylus wear.
PATENT NOTICE: Cartridge and stylus manufactured under one or more
of the following U.S. patents: 3,055,988, 3,077.521, 3,077,522, and 3,463,889.
Copyright 1978, Shure Brothers Inc.
27A1246 (RE) Printed in U.S.A.
5.0 mV
6.2 mV
20 to
20,000
Hz
20 to
20,000
Hz
within
2 dB
-
25 dB
at
1 kHz
-
3/4
to
1
urams
; : !
orams
400 HZ
-
22 cm/sec
1,000 Hz
-
33 cm/sec
10,000 Hz
-
19 cm/sec
at 1 gram