Shure M91ED-GS User Guide
222
HARTREY
AVE..
EVANSTON. IL.
60204
U.S.A.
MODEL
m-rRACK
M91
ED-GS
DATA SHEET
STEREO DYNETICO
PHONOGRAPH CARTRIDGE
HEAD ASSEMBLY
FOR GARRARD "SL" SERIES
AUTOMATIC TURNTABLES
Y4
-
TRACKING FROM
GRAMS (Except
the
1%
SL75B)
SPECIFICATIONS
FREQUENCY
RESPONSE:
OUTPUT VOLTAGE:
CHANNEL
SEPARATION
CHANNEL
BALANCE
l
NPUT IMPEDANCE:
INPUT
CAPACITANCE
INDUCTANCE:
D.C. RESISTANCE:
STYLUS MODEL
N9lED
TRACKING FORCE:
LIGHT TRACKING FORCE WITH HIGH TRACKABILITY:
ligl~tcl. the tracking force, the longer the life of the stylus and
1.cco1.d~. urovided the stvlus can follow the groove without
losing coritact. A cartrldne-trackinp urowerlv wrovCdes an accurate
t1ribr;ken flow of signals-from theurecofd gEohve to the amplifier.
Signals recorded at a
to track
trackability at light tracking forces.
TRACKABI LITY:
At a stylus force of 1 gram
(Higher stylus forces within specified range improve trackability.)
GENERAL:
sterw 1,210no cartridge rriounted in a Garrard pickup head. Tlie
Model M91ED-GS is designed specifically for Garrard "SL" Series
B automatic turntables (except
grams.
:
:
proper.ly. This stereo Dynetic cartridge provides high
This model is an improved high quality "Hi-Track"
From 20 to 20,000 Hz.
5.0 millivolts per channel at 1,000
at 5 cm/sec.
Nominally 25 db at 1,000
Within 2
Nominally 47,000 ohms (per channel). Can
be up to 70,000 ohms with almost inaudible
change in frequency response.
:
400-500 picofarads per channel including
tonearm wiring and amplifier input capacitance.
720 millihenries
630 ohms
Replacement : Grip Color-Yellow
ELLIPTICALLY SHAPED NUDE DIA-
MOND TIP
,0007 inch (17.8 microns) frontal radius
:)A
hlgher level (cm/sec.) are more difficult
1,000 Hz. - 33 cm/sec
10,000 Hz. - 19 cm/sec
db
of each other
,0002 inch
,0010 inch (25.4 microns) between points
to
400 Hz.
(5
microns) side contact radii
of contact with groove.
1%
grams
-
22 cm/sec
SL75B), tracking from
Hz.
Hz.
3/,
The
to 1%
INSTALLATlON
1.
Rclriove prcsrnt pickup head and insert Shure Model into
phono arm. Care must be taken in removal and
the pickup heads not to cause damage to the stylus. For
rr~axiniurri safety, leave the stylus guard on the cartridge
during
2
SUGGESTIONS FOR CLEANING YOUR STYLUS:
the stylus,
diuued
is-breferFed. -(WARNING: Commercial record or stvlus cleaning
solutions rrlav cause corrosion and vermanent stvius damaee.3
~--~
The alcohol "will remove any sludge' deposits wh'lch may hBve
coated the stylus tip. The brush bristles should be trimmed to
a length no
a
forward n~o\%ment from the rear (terminal end of the cartridge) to the front. NEVER brush or wipe the stylus from
front to back or side to
RECORD CLEANING:
immerse it in a solution of mild dishwashing liquid detergent
and lukewarm or cool water
lint-free cloth to work the
the grooves around for a thorough cleansing. Then, rinse with
clear, cool or lukewarm water (preferably distilled) and dry
with a lint-free cloth.
removal
Balance arm as per Garrard instructions and set stylus force
indicator to recommended tracking force A force greater
than thc indicated "maximum" should not be used.
linhtly in alcohol or alcohol-water solution; grain alcohol
or insertion of pickup head.
use a camel's-hair brush (No. 2 size or smaller)
lonper than
1%
inch. ALWAYS brush the stylus with
slde
An effective way to clean a record is to
(wreferablv distilled water). Use a
ml'xture into the grooves, following
inscrting of
To clean
EASY STYLUS REPLACEMENT
Grasp molded housing of stylus
between
withdraw stylus by pulling forward
out of cartridge. Grasp replacement
stvlus between thumb and
and insert into stylus socket. press
stylus into socket until molded housing of the stylus mates with the
cartridge case. Care must be taken
not to-allow the finger to slip off
the molded housing of the stylus
resulting in damage to the stylus
tip or shank.
SPECIAL NOTE:
tridges
performance standards of your cartridge, be certain that any replacement stylus you buy bears the following certification on the
package: "This
by Shure Brothers Inc."
DEGRADE VE PERFORMANCE OF YOUR CARTRIDGE. ALI,
GENUINE DYNETIC" STYLI ARE MANUFACTURED
SHURE BROTHERS INC.
GUARANTEE:
to be free from electrical and mechanical defects for a period of
one year from the date of purchase. Please retain proof of
purchase date. This guarantee includes all parts and labor.
This guarantee does not include stylus wear.
SHIPPING INSTRUCTIONS:
return it prepaid to the factory. If outside the United States.
return the unit to your dealer or authorized Shure Service Center
for repair. The unit will be returned to you prepaid.
PATENT NOTICE:
one or more of the following
3,077,522, and 3,463,889.
thumband forefinger. Gently
forefin~er
STYLUS
1s the most critical component. To maintain the original
AVOID INFERIOR IMITATIONS. THEY
Tlie Dynetic stylus assembly used in these car-
Stereo Dynetic stylus is precision manufactured
This Shure product is guaranteed in normal use
Carefully repack the unit
Cartridge and stylus manufactured under
U. S. Patents 3,055,988, 3,077,521,
REPLACEMENT
WILL SERIOUS1,Y
BY
and
Copyright 1972, Shure Brothers Inc. Printed in
27A922 (LB)
U.S.A.
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