Shure M81ECS Manual

222 HARTREY
AVE..
EVANSTON. IL. 60204
U.S.A.
@
AREA
CODE 312,328-9000 CABLE: SHUREMICRO
THE PREMIER FAMILY OF STEREO SOUND REPRODUCERS
M81ECS
STEREO DYNETIC@
m-TRACK
PHONOGRAPH CARTRIDGE
EASY-MOUNT
CARTRIDGE AND STYLI SPECIFICATIONS
N75EC
10 X 1B&
(.0004 X
,0007 in.)
Biradial
N75-3.1
64 microns
(.0025 in.)
spherical
I
iOptional 78 rpm Stylus:
Set amplifier to "MONO" or "A+B."
'Output voltages glven for stereo cut record. For M O N O cut record,
output voltage at both left channel and right channel cartridge term~nals
will be 71% of figures above.
**Tracking forces greater than maximum ind~cated should not be used.
NET WEIGHT:
6.6
grams
INDUCTANCE: 615 mill~henries
DC RESISTANCE: 7' 4 0 ohms
OPTIMUM LOAD: 47,000 ohms resistance in parallel with 400 to 500 pico-
iarads total capacitance per channel. Load resistance can be up to 70,000
ohms w ~ t h almost no audible change in frequency response. Total capaci-
tance includes both the tone arm wiring and amplifier input clrcuit.
FOUR-CHANNEL: This Stereo Dynetic@ cartridge is compatible with all
iour-channel matrix systems.
MONOPHONIC OPERATION: Set funct~on switch on amplifier to "MONO"
or "AS-B." If ampliiier 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 ground (usually green)
to "RG." Left "hot" lead (usually
white) to "L," left ground (usually
blue) to "LG." If metal head
IS
causing ground loop hum, remove
the ground tab. The metallic car-
tridge shield is disconnected from
the r ~ g h t channel ground by the
removal of the ground tab.
CAUTION: D o not make solder
connections
to cartridge terminals.
STYLUS REPLACEMENT (see Fig-
ure 2):
Grasp molded housing of
stylus and gently pull forward out
of cartridge. Insert replacement
stylus into socket and press until
housing mates with cartridge case.
"EASY-MOUNT" MOUNTING [12.7
mm (1/2 In.) mounting centen]:
Mounting screws are provided.
1 . Remove stylus guard and stylus
(see Stylus Replacement).
2. Remove cartridge from snap-in
bracket (see Figure 3).
3.
Attach bracket to tone arm
head or plug-in shell in ac- FIGURE 2
cordance with turntable manu-
facturer's instructions. General-
Brown
(Elliptical)
N75-3.1
64 microns
(.0025 in.)
ly, the top of the bracket
~ ~ H ~ E L D O F ~ A R T R I D ~ ~ M U S T B E P L A C E ~
should be flat against the top
y ~ ~ ~ : : ; r r : ~ P ~ ~ E : " C K ' N G
cArTR'""rw"
"OLE
OF
of the head or shell.
Dark
I
Green
4. connect leads to cartridge (see
Figure 1).
5 . Insert cartridee into s n a ~ - i n
9.3 mV
Dark
Green
bracket (see FYgure 3).
.
6. Retnsert stylus (see Stylus Re-
6.2 mV
" I o g o
iw
LLlFT HERE W i H THUMBNAIL FOR REMOVAL
OF ClRTRlDriC FROM BBnCKLT
20 to
20,000
Hz
6.2 mV
placement). FIQURE 3
RECOMMENDED STYLUS CLEANING: Use a camel's hair brush (No. 2 size
or smaller), trimmed to approx~mately 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 adjusting antlskating
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 it 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. D o 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
cartridee. be certain that anv re~lacement stvlus vou buv bears the fol-
20 to
,
.
l o w i n i iertification on the package: "This bynet'1c@ stilus is precision
manufactured by Shure Brothers Inc." AVOID INFERIOR IMITATIONS. THEY
WILL SERIOUSLY DEGRADE THE PERFORMANCE OF YOUR CARTRIDGE.
ALL GENUINE "DYNETICO" 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 to
the Small World of a Stylus."
FULL ONE YEAR WARRANTY: Shure Brothers Incorporated ("Shure"),
222 Hartrey Avenue, Evdnston, Illinois 60204, warrants to the owner of this
product that i t w i l l be free, in normal use, of any defects in workmanship
and materials for a p e r ~ o d of one year from date of purchase. You should
retain proof of date of purchase. Shure is not liable for any consequent~al
damages. If this Shure product has any defects as described above, care-
fully repack the unit and return i t prepaid to the above address. If you
are not in the United States, return the unit to your dealer or authorized
Service Center for repair. The unlt w i l l be repaired or replaced and re-
turned to you promptly, and i f 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 1976, Shure Brothers Inc.
27A1276 (PD) Printed in U.S.A.
within
2 dB
20 to
20,000
Hz
-
1
20 dB
at
1 kHz
- -
/
2
to 4
grams
-
400 Hz
-
26 cm/zec
1000 Hz-37 cmlsec
10:000 Hz
-
12
cmlsec
at 3 grams
w z
t o
3
grams
w z
1
$is
1