Shure M73G User Guide

222

Hr.llTBIY

AREA

CODE 312/328-9000

AYE

EVANSTON.

ILL.

CABLE

(60204)

U.S.A.

SHUREMlCRO

MODEL

EASY-MOUNT

M73G

DATA SHEET

STEREO DYNETIC@

PHONOGRAPH CARTRIDGE

SPECIFICATIONS

M71 AND M73 CARTRIDGE SERIES

N71 AND N73 STYLI SERIES

Model

Number

M71-6

M71C

*The N75-3 stylus may be used to reproduce the standard 78
rpm records. In this case, the amplifler should be set to "Mon­aural" or

TRACKABI

Higher stylus forces within specifled range improve trackability.

FREQUENCY RESPONSE:
CHANNEL SEPARATION:
RECOMMENDED LOAD IMPEDANCE:

INDUCTANCE:

D.C. RESISTANCE:

MOUNT1 NG:

WEIGHT:
TERM I NALS:
GENERAL:

tridges has been developed for use

having magnetic and constant veloclty inputs.

MOUNTING:

centers. Hardware
screws have British threads.)

1.

Remove stylus guard and stylus from cartridge. (See para­graph 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

connection to terminal
dicated in tone-arm

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

Diamond Stylus Tracking

/

Replacement

nnn~

(.om mm,

NE71-6 Radius:
.0006" (.015 mm)

NC71 Radius
.0006" (.Ol5 mm)

N75-3,* Radius:

/

(:''~~~~~.~'

6.2 millivolts

:

9.0 millivolts

6.2 millivolts

4.4

millivolts

I

%$

-

Green

Beige

Blue

Gray

Green

1

(Grams)

1%

to 3 millivolts

1% to

3

to

1

to 1%

1% to

5

"A+B."

LITY:

M7lEB at a

400

M71-6 at a stylus force of

400

M71C

400 Hz.

M73G at a stylus force of 1 gram

400 Hz.

720 millihenries

Standard

"Easy-Mount" snap-in bracket.

5

grams

4 terminals

The M71 and

The cartridge bracket has standard 1h" mounting

1)

1)

SHIELD OF CARTRIDOE

~B~~~~l~$~&~~~~f~E~FBEL~~zE~~C~l~~

\

st

Hz.

Hz.

at a stylus force of 3 grams

1s provided for mounting purposes. (The brass

lus force

-

1x3 cm/sec.

-

14.3 cm/sec.

-

14.3 cm/sec.

-

14.3 cm/sec.

From 20 to 20,000

More than 20 db at 1,000

630 ohms.

%"

(12.7 mm) mounting center using new

M73

phono-cart~idge. Note color code for proper

"L,

instruction

of

1%

grams

1%

grams

Hz.

Hz.

47,000 ohms per channel

Series of Dynetic phonograph. car-

wlth all high fidelity

"R,"

"LG"

manual.

UUST

BE PLACED

EARTRIDCE

BUMP

HOLE OF BRACKET.

IN

7

and

amplifiers

"RG"

as in-

-.

3

3

--

CARTRIDGE AND BRACKET ASSEMBLY

FOR REMOVAL OF BRACKET.

FIGURE I

7. The top of the "Easy-Mum* ' br+ket should be .flush against
the top of the tone arm head tor proper

unless other mounting instructions are supplied 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 supplied with the pickup arms.

OPERATION:

are listed under
cated "maximum"

Recommended needle forces for optimum resulta

"S

eciflcations." Forces greater than the indi-

siould not be used.

playlng position.

To mount the

car-

CONNECTIONS

4-LEAD STEREO CONNECTION:

channel to terminal
nel to terminal
minal

"L"

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

be used at cartridge terminals.

MONAURAL CONNECTION:

Monaural or Stereo recordings, connect "hot" lead to both
and
ground terminals marked "RG and

and shield or ground lead of left channel to

"L

terminals and connect ground or shield lead to both

"R

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

and shield or ground lead of right chan-

Connect "hot" lead of right

"LG."

For single channel reproduction of

"R

"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
slud e de
brisfies sguld be trimmed to a length no longer than

Always

(terminal end of the cartridge)

the stylus from front to back or side to

CAUTION:

connectione to cartridge termi­nals. Make all solder connections
to terminal
slipping them over the terminals.

sits which may have coated the stylus tip. The

brush the stylus with a torward movement from the rear

Do not make solder

jacka provided before

tp the front.

slde.

Never

brush or wipe

an

brusE

inch.

TERMINAL DIAGRAM STYLUS REPLACEMENT

FIGURE

2

FIGURE

3

EASY STYLUS REPLACEMENT

Grasp molded housing of stylus between thumb and foreflnger.
Gently withdraw stylus by pulling forward out of cartridge. Grasp
replacement st lus between thumb and forefinger and insert into
stylus socket.
of the
not to
stylus, resulting

SPECIAL NOTE:

tridges is the most critical component. To maintain the original
performance standards of your cartridge, be certain that any re­placement

package:

by Shure Brothers, Inc.

Avoid inferior imitations. They will
formance of your cartridge. All genuine
manufactured by Shure Brothers, Inc.

LABORATORY TEST FINDINGS:

test flndin s of the Shure
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

the compliance varied from a low of 0.9 to a high of 11.5, requirin

9.0 grams to
grams with a high compliance stylus. The high compl.Iance stylus
retracted at
drag on the record surface, thereby becoming inoperative. Re­sponse at high fre uency (relative to the
.i.Fjdb peak to a 3rop of 7.5db. Separation varied from "good"

(27db) to (16.5db), at 1 kc. These flgures reveal that there

is very
imitation

In each of the categories shown above the results ranged

good to poor. As a matter of fact, only 10%
Shure performance standards for the Shure N3D Stereo
Stylus.
records show that an increasing number of
tridges are being returned because of poor performance-and our
examination has disclosed that most of these returned cartridges
are using imitation

CONCLUSION:

we cannot uarantee that the performance of Shure
cartridges wi1 meet the published Shure spe~ciflcations. Accept no
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
cover stylus wear, nor
bly from abuse or mishandling.

PATENT NOTICE:

3,077,521 and
Copyright 1969, Shure Brothers. Inc.

27A663 12-69)

sress

st

st

lus mates with tbe cartridge case. Care must be taken

afow the Anger to slip off the rpolded housing of the

st

lus yoW buy bears the following certiflcatlon on the

xis

trf~ck a record with a low compliance stylus, and

4

grams needle force, allowing the cartridge case to

liy8z'dnsistency in perforrnan?e characteristics of the

Dynetic Styli.

In addition to our test findings, our Service Department

Obviously, if

lus into socket until the molded housing

In damage to the stylus tip or shank.

The Dynetic stylus assembly used in these car-

Stereo Dynetic stylus is precision manufactured

seriou?? degrade the per-

8ynetic" styli are

N3D stylus are an example of t%e dose

perkormance characteristics. For example,

Dynetic Styll.

any

(Note: The followin

!kc level) ranged from a

of

the samples met the

Dynetic Phono Car-

imitation Dynetic Stylus is used,

st

from

Dynetic

Dynetic

Guarantee

corn lied with fully. The Guarantee does not

$oes it cover damage to the stylus assem-

Manufactured under

3,077,522.

Other patents pending.

.U.

S.

Patents 3,055,988,

Printed in

U.S.A.

lus

5