Shure M71EB User Guide

222

MAITRLY AVL

AREA

CODE

EVANSTON.

312/32#-9000 CABLE

ILL.

(60204)

SHUREYICRO

V.S.A.

MODEL

EASY-MOUNT

M71EB

DATA SHEET

STEREO DYNETICB

PHONOGRAPH CARTRIDGE

SPECIFICATIONS

M71 AND M73 CARTRIDGE SERIES

N71 AND N73

Model

1

Number Replacement

----

"'7"

Bl73G Ni3G

-

--

*The

N75-3

rpm records. In this case. the amplifler should be set to "Mon­aural" or

TRACKABILITY:

Higher stylus forces within specifled range improve trackability.

FREQUENCY RESPONSE:
CHANNEL SEPARATION:
RECOMMENDED LOAD IMPEDANCE:

INDUCTANCE:

D.C.

RESISTANCE:

MOUNT I NG

WEIGHT:
TERMINALS:
GENERAL:

tridges has been developed for use with all high fidelity
having magnetic and constant velocity inputs.

MOUNTING:

centers.
screws have British threads.)

Kenlove stylus guard and stylus from cartridge.

1.
graph on stylus replacement.)

2.

Remove cartridge from "Easy-Mount" snap-in bracket. (See
(Figure

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-~art~idge. Note color code for proper
connection to terminal
dicated in tone-arm instruction

6.

Insert cartridge into "Easy-Mount" snap-in bracket. (See
Figure

Diamond S+yIus

-I

-

-

-

--

- - -

NCi

Radius:

,0006''

(.015 mm)

-.. . .

--

Radius:

.0006" (.015

stylus may be used to reproduce the standard

"Ai-B."

:

5

grams

The

Hardware

1)

1)

YEW"

mm)

M71EB

at a st

400 Hz. - 113

M71-6

at a stylus force of

400 Hz. - 14.3

M71'C

at a stylus force of 3 grams

400

Hz.

M73G at a stylus force of 1 gram

Standard

"Easy-Mount" snap-in bracket.

4

The cartridge bracket has, standard

-

400 Hz. - 14.3

720

millihenries

630

ohms.

'/z"

terminals

M71

and

IS

provlded for mount~ng purposes. (The brass

SHIELD OF GARTRIOOE

OF @RACKET BEFORE LOCKIN@

(IUYP

IN

FRONT

STYLI SERIES

1

0$5:i

$!:?*

1

$3;

1

5

-

-

14.3

M73

noLc

cm/sec.)

-

-

-

19.0

n~illivolts

6.2

millivolts Gray 1 to

ius

force of

cmlsec.
cm/sec.

cm/sec.

cm/sec.

From

20

to

More than

(12.7 mm) mounting center using new

20

Series of Dynetic pllonograph car-

L.

"R."

manual.

MUST

BE PLACED

OF

IRACKLT.

1%

1%

grams

U),000

db at

47,000

"LG"

-

1

Blue

grams

Hz.

1.000

ohms per channei

and

Trackin

(~ramsg

1

3

Hz.

amplifiers

1:/2''

mounting

(See

"RG

to

--

para-

as in-

5

1%

-

78

CARTRIDGE

\--LIFT

HLRE WITH THUMBNAIL

FOR RLYOVAL Of BRACKET.

AND BRACKET ASSEMBLY

FIGURE

I

7. The top of the "Easy-Mount" bracket should be flush against
the top of the tone arm had
unless other mounting instructions are suppl?ed by the record
changer/tone arm manufacturer.

8.

Reinsert stylus.

SHURE-SME MOUNTING INSTRUCTIONS:

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

OPE RAT I ON

are listed under
cated "maximum" should not be used.

:

Recommended needle forces for optimum results

"Specifications." Forces greater than the indi-

fa

proper laying position,

To mount the car-

supplled wlth the pickup am.

CONNECTIONS

4-LEAD STEREO CONNECTION:

channel to terminal
nel to terminal

"L"

minal
To prevent "ground loops" and hum, no common connection should

be used at

MONAURAL CONNECTION

Monaural or Stereo recordings, connect "hot" lead to both
and

ground terminals marked "RG" and "LG."

and shield or ground lead of left channel .to "LG."

cartridge

"L"

terminals and connect ground or shield lead to both

"R"

"RG." Connect "hot" lead of left channel to ter-

and shleld or ground lead of nght chan-

terminals.

Connect "hot" lead of right

:

For single channel reproduction of

"R"

Suggestions for Cleaning Your Stylus

To clean, the stylus, use a camel's-hair brush (No. 2 size or
smaller)
sludge deposits which may have coated the stylus tip. The brush
bristles should be trimmed to a length no longer than

Always

(terminal end of the cartridge) to the front. Never brush or wipe

the stylus from front to back or side to side.

CAUTION:

connections to cartridge termi-

nals. Make all solder connections
to terminal jacks provided before
slipping them over the terminals.

dlpped lightly in alcohol. The alcohol will remove any

?4

brush the stylus with a forward movement from the rear

inch.

Do not make solder

TERMINAL DIAGRAM STYLUS REPLACEMENT

FIGURE

2

FIGURE

3

EASY STYLUS K~~LACEMENT

Grasp molded housing of sty!us between thumb and, forefinger.
Gently wlthdraw stylus by ~ulling forward out of cartridge. Grasp
replaEement st lus -between thumb and forefin er and insert into

stvlus socket.

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

SPECIAL NOTE:

tridees is the most critical com~onent. To maintain the orininal
perfsrmance standards of your tartridge, be certain that any re­placement stylus you buy bears the following certification on the

package: "This Stereo

bv Shure Brothers. Inc."

void

formance of your cartridge. All genuine
manufactured by Shure Brothers, Inc.

LABORATORY TEST FINDINGS:

test

findin s of the Shure N3D stylus are an example of t%e cyose
scrutiny ~%ure pays to all imitation Shure Dynetic Styli.) Shure
laboratory tests show that the imitation stylus assemblies labeled
as replacements for the Shure Model N3D Stylus Assembly vary

drastically in important performance characteristics. For example,
the compliance varied from a

9.0

grams to track a record wlth a low compliance stylus, and
grams with a high compliance stylus. The high compliance stylus
retracted at
drag on the record surface, thereby becoming inoperative. Re-

sponse at high frequency (relative to the lkc level) ranged from a

5.5db peak to a drop of 7.5db. Separation varied from "good"

(27db) to "poor" (16.5db), at 1 kc. These figures reveal that there
is very little consistency in performance characteristics of the
imitation

In each of the categories shown above the results ranged from

good to poor. As a matter of fact, only 10% of the samples met the

Shure performance standards tor the Shure N3D Stereo

Stylus. In addition to our test findings, our Service Department
records show that an increasing number of
tridges are being returned because of poor performance-and our

examination

are using

CONCLUSION:

we cannot guarantee that the performance of Shure

cartridges will meet the published Shure

substitute.

The Stereo Dynetic Cartridges and Stereo Dynetic Styli are
guaranteed to be free from electrical and mechanical defects for
one year from the date of shipment from the factory, provided
all instructions are complied with fully. The Guarantee does not

cover stylus wear, nor does it cover damage to the stylus assem­bly from abuse or mishandling.

PATENT NOTICE:

3,077,521 and 3,077,522. Other patents pending.
Copyright 1969, Shure Brothers,

274566 (2-69)

%ress stvlus into socket until tfe molded housing

shank.

The Dynetic stylus assembly used in these car-

Dynetic stylus is precision manufactured

inferior imitations. They will serio%l de rade the per-

(Note: The followin

10.w of

0.9

4

grams needle force, allowing the cartridge case to

8ynefic" styli are

st

to a high of 11.5, requirin

lus

Dynetic Styli.

Dynetic

Dynetic Phono Car-

,has disclosed that most of these returned cartridges

im~tatlon Dynetlc Styli.

Obviously, if

any

imitation Dynetic Stylus is used,

specifications.

Dynetic

Accept no

Guarantee

Manufactured under

Inc.

U.

9.

Patents

Printed in U.S.A.

3,055,988.

3