Shure M71C User manual

222 HARTREY AVE., EVANSTON, li. 60204 U.S.A.
AREACODE312/328.9000 . CA8LE:SHUREMICRO
MODEL M71C DATA SHEET
EASY-MOUNT
STEREO DYNETIC@
PHONOGRAPH CARTRIDGE
SPECIFICATIONS
M71 AND M73 CARTRIDGE SERIES
N71 AND N73 STYLI SERIES
Model Diamond Stylus
Number Replacement
5 cm/sec.)
~ ~~-
Side Contact Radius:
.0004" (.010 mm)
Frontal Radius :
.0007" (.018 mm)
M71-6 NB71-6 Radius:
/ 6.2 ~nillivolts 1 Beige 1 l?b to 3
/ ,0006" (.OX mm)
-
*The N75-3 stylus may be used to reproduce the standard 78
rpm records. In this case, the amplifler should be set to "Mon-
aural" or "A+B."
TRACKABILITY:
M71EB ata stylusforceof 1% grams
400 Hz.
- 14.3cm/sec.
M71-6 ata stylusforce of 1% grams
400 Hz.
- 14.3 cm/sec.
M71C at a stylus force of 3grams
400 Hz.
- 14.3 cm/sec.
M73G ata stylus force of 1 gram
400
Hz. - 14.3 cm/sec.
I I I I
Higher stylus forces within specified range improve trackability.
FREQUENCY RESPONSE:
From 20 to 20,000 Hz.
CHANNEL SEPARATION: More than 20 db at 1,000Hz.
RECOMMENDED LOAD IMPEDANCE: 47,000 ohms per channel
INDUCTANCE: 720 millihenries
D.C. RESISTANCE: 630 ohms.
MOUNTING: Standard '/z" (12.7 mm) mounting center using new
"Easy-Mount" snap-in bracket.
M71C
WEIGHT: 5 grams
TERM I NALS: 4 terminals
9.0 milli.io1ts
NC71 Radius :
,0006'' (.OX mm)
GENERAL: The M71 and M73 Series of Dynetic phonograph car-
tridges has been developed for use with all high fidelity amplifiers
having magnetic and constant velocity
inputs.
MOUNTING: The cartridge bracket has standard 1/2" mounting
centers. Hardware is provided for mounting purposes. (The brass
screws have British threads.)
Blue
1. Remove stylus guard and stylus from cartridge. (See para-
graph on stylus replacement.)
3 to .5
-.
2. Remove cartridge from "Easy-Mount" snap-in bracket. (See
(Figure 1)
3. Start mounting screws into tone arm head or plug-in shell.
4. Slip "Easy-Mount" bracket under heads of mounting screws
and tighten screws securely.
5. Connect leads to phono-$artridge. Note color code for proper
connection to termlnal
L,:' "R," "LG" and "RG" as in-
dicated in tone-arm instruct~onmanual.
~~ -...-~ ~
6. Insert cartridge into "Easy-Mount" snap-in bracket. (See
Figure
1)
SHIELD OF CARTRIDGE MUST BE PLACED
~B~~l;~~~~~;F~::I;:E+p~~~~~
\
OARTRIDQE BUMP IN
HOLE OF BRACKET.
7
\--LIFT HERE WITH THuwNAlL
FOR REMOVAL OF BRACKET.
CARTRIDGE AND BRACKET ASSEMBLY
FIGURE I

7. The top of the "Easy-Mount" bracket should be ,flu=\ aga!nSi
the top of the tone arm head for proper playing position,
unless other mounting instructions are suppl~ed by the record
changer/tone arm manufacturer
8. Reinsert stylus.
SHURE-SME MOUNTING INSTRUCTIONS:TO mount the car-
tridge in the Shure-SME Precision Pickup Arm, Model
3009 and
3012, refer to the paragraphs on Cartridge Installation and Balanc-
ing In the Instruction Manual supplied with the pickup arms.
OPERATION: Recommended needle forces for optimum results
are listed under "Speciflcations." Forces greater than the indi-
cated "maximum" should not be used.
CONNECTIONS
4-LEAD STSREO CONNECTION: Connect "hot" lead of right
channel to terminal "R" and shield or ground lead of rlght chan-
nel to terminal
"RG." Connect "hot" lead of left channel to ter-
ininal L" and shield or ground lead of left channel ,to "LG."
To prevent "ground loops" and hum, no common connectlon should
be used at cartridge terminals.
MONAURAL CONNECTION: For slngle channel reproduction of
Monaural or Stereo recordings, connect "hot" lead to both
"R"
and "L" terminals and connect ground or shleld lead to both
ground terminals marked
"RG" and "LG."
Suggestions for Cleaning Your Stylus
To clean the stylus, use a camel's-hair brush (No. 2 size or
smaller) dipped lightly in alcohol. The alcohol will remove any
sludge depvsits which may have coated the stylus tip. The brush
bristles should be trimmed to a length no longer than
% inch.
Always brush the stylus with a rorward movement from the rear
(terminal end of the cartridge) tv the front. Never brush or wipe
the stylus from front to back or s~deto side.
CAUTION: Do not make solder
connections to cartridge termi-
nals. Make all solder connections
to terminal jacks provided before
slipping them over the
terminals.
TERMINAL DIAGRAM STYLUS REPLACEMENT
FIGURE
2 FIGURE 3
EASY STYLUS REPLACEMENT
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: Tltt*Ijynt.tic sty111.3:i~:il~~~lt)ly
USV~ ill tllr.ie Cii1.-
tl.~clgcs 13 tllc lllust cr~rrcslC!,III~)UIIC.I~~.TI)~~~:iilil:~inthe (8riglnal
LI~~I~I~I~III:~~~~~~I:ill(li~~~d~ of YULII.v:irt~~tdx~, ltc ct~lla111tl~atally re-
placement stylus you. buy bears the foilowing certification on the
package: "This Stereo Dynetic stylus is precision manufactured
by Shure Brothers, Inc."
AVOID INFERIOR IhTITATIONS. THEY WILL SERIOUSLY
DEGRADE THE PERFORMANCE OF YOUR CARTRIDGE ALL
GENUINE "DYNETIC" STYLI ARE MANUFACTURED BY
SHURE BROTHERS INC.
LABORATORY TEST FINDINGS: (Note: The following stylus
test findines of the Shure N3D stvlus are an exam~leof the close
9 ~rnrils to trark a record with a low comwiiance stvlus.'and 2
6:6db pcak 'io a drop of 7.5dlr. Separation varied from "good"
(27db) to,"poorM (16.5db), at 1 kc: These figures reveal ,that there
is very l~ttleconsistency in pertormance character~stlcsof the
inlitation Dynetic Styli.
In each of the categories shown above the results ranged from
good
to poor. As a matter of tact, only 10% of the samples met the
Shnre periorni:lnce standards for the Shure N3D Stereo Dynetic
Stylr~s.In addition to our test findings, our Service Department
~,ecordsshow that an Increasing number of Dynetic Phono Car-
tridges are being returned because of poor performance-and our
esarninntion has disclosed tnat most of these returned cartridges
arc using imitation Dynetic Styli.
CONCLUSION: Obviously. if any imitation Dynetic Stylus is used.
we cannot gltar~nteethat the performance of Shure Dynetic
cartridges will meet the publijhed Shure speciflcations. Accept no
substitute.
GUARANTEE: This S~LIIY'p~,oductis guaranteed in normal use
to be free fr.oni electi.i(~;~land rliechariical defects for a pt3riod of
onc year, froni ttic clatl' of pu~.chase. Plcasc retain proof of
purch:rse dntt,. Tills gri;rt.antee in(:ludes all parts and labor.
This guarantc('
dor.s nut int,lu(l<.stylirs wear.
SHIPPING INSTRUCTIONS: Carefnlly repark the unit and
t.eturn it pt.i,~miti to ti-i(. f:rt,to~y. If oulsidt, the 1Jnitt.d Statt's,
return the un~t to your dealer or, autlio~~izedShur.c Ser.vice Center
for r'5patr. Tiit, unit will
bc ~,eturntdto you prepaid.
PATENT NOTICE: C:~rt~,idgeand 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.
Copvright 1969 Sliul'e GIotliers Inc. Printed in U.S.A.
27A565 (KK)