2 2 2 WARTR%I AYE
EVANSTON. ILL. ( 6 0 2 0 4 )
AREA COOE 3 1 2 / 3 2 8 . 9 0 0 0
U.S.1.
CABLE SHUREMICRO
DATA SHEET
MODEL M75-6
TYPE 2
STEREO DYNETICB
PHONOGRAPH CARTRIDGE
SPECIFICATIONS
M75 TYPE 2 CARTRIDGE AND N75 TYPE 2 STYLUS SERIES
Model
Number
-
.
1
Diamond Stylus
Re~lacement
I
4
M7.5E
TYPE 2
1
!
i
1I
M76G
TYPE 2
M75EJ
TYPE 2
1
/
/
N75E TYPE 2.
(E T2) Elliptical
Side 'Contact Radius:
0002" (.005 ~ m )
Frontal Radius:
,0007" (.018111111)
5.0 millivolts
N75G TYPE 2
(G T2) Radius:
,0006" (.015 mm)
5.0 millivolts
1
I
N75-3,* Radius:
,0025" (.064 mm)
I
Tracking
(Grams)
Yellow S/4 to 1%
I Dark
/
5.0 millivolts
.0004" (.010 nlm)
Frontal R a d ~ u :s
,0007'' (.018 mm)
N75-6 T Y P E 2
(6 T2) Radius:
.0006N (.015 mm)
Stylus
Grip
Color
S/s t o 1%
Gray
I
(EJ
,
/
I
TYPE 2
1 N75E.J
T2) Elliptical
Side Contact Radius:
M75-6
TYPE 2
Output Voltage
(l.000 Hz. at
5 cm/sec)
.
.
Light
Green
1% t o 3
Beige
1% to 3
1
5.0 millivolts
1
I
6.2 millivolts
I
Green
1% t o 3
* T h e N75-3 stylus m a y
be used to reproduce t h e standard 78
rpm records. I n this case, t h e amplifier should be s e t t o "Monaural" o r "A+B.
TRACKABILITY:
M75E T Y P E 2 a t a stylus force of 1 gram
1175G T Y P E 2 a t a stylus force of 1 gram
400 Hz. - 20 cm/sec
1,000 Hz. - 28 cni/sec
10,000 Hz. - 18 cm/sec
M75-6 TYPE 2 a t a stylus force o i 2 grams
M75EJ T Y P E 2 a t a stylus force of Y g r a m s
400 Hz. - 28 cm/sec
1,000 Hz. - 35 cm/sec
10,000 Hz. - 20 cm/sec
Higher stylus forces within specified range improve trackability.
F R E Q U E N C Y RESPONSE: F r o m 20 t o 20,000 H Z (cPS)
C H A N N E L S E P A R A T I O N : More t h a n 25 d b a t 1,000 Hz (CPs)
R E C O M M E N D E D L O A D I M P E D A N C E : 47,000 ohms per channel
I N D U C T A N C E : 720 millihenries
D.C. R E S I S T A N C E : 630 ohrns
M O U N T 1 N G : Standard
WEIGHT:
Yz" (12.7 mm) mounting center
6 grams
T E R M I N A L S : 4 terminals
G E N E R A L : T h e M75 T Y P E 2 Series of H i g h Trackabi!ity Dynetic
phonograph cartridges has been developed for use w i t h all hlgh
fidelity amplifiers having magnetic and constant velocity inputs.
S H U R E - S M E M O U N T I N G I N S T R U C T I O N S : T o mount t h e M75
:n t h e Shure-SME Precision Pickup Arm, Model 3009 and 3012,
refer to the paragraphs on Cartridge Installation a n d Balancing
i n t h e instruction Manual supplied with t h e pickup arms.
O P E R A T IO N : Recommended needle forces for optimum results
a r e listed under "Specifications."
Forces greater t h a n t h e indicated "maximum" should not be used.
COkNECTlONS
Connect "hot" lead of right
channel to terminal "R" and shield or ground lead of right channel to terminal "RG." Connect "hot" lead of left channel to terminal "L" and shield or ground lead of left channel to "LG."
To prevent "ground loops" and hum, no common connection
should be used a t cartridge terminals.
M O N A U R A L CONNECT IO N : For single channel reproduction of
Monaural or Stereo recordings, connect "hot" !ead to both "R"
and "L" terminals and connect ground or shield lead to both
ground terminals marked "RG" and "LG."
4 - L E A D STEREO CONNECTION:
Suggestions for Cleaning Your Stylus
T o clean the stylus, use a camel's-hair brush (No. 2 size or
smaller) dipped lightly in alcohol. The alcohol will remove any
sludge deposits which may have coated the stylus tip. The brush
bristles should be trimmed to a length no longer than 1/4 inch.
A l w a y s brush the stylus with a forward movement from the rear
(terminal end of the cartridge) to the front. Never brush or wipe
the stylus from front to back or side to side.
C A U T I O N : Do not make solder connections to cartridge terminals.
Make all solder connections to terminal jacks provided before
slipping them over the terminals.
LEFT
RIGHT
CHANNEL
TERMINAL
GROUND TAB
RIGHT
CHANNEL
GROUND
TERMINAL
GROUNDED
TO CASE
TERMINAL DIAGRAM
FIGURE I
STYLUS REPLACEMENT
FIGURE 2
EASY STYLUS REPLACEMENT
Grasp molded housing of stylus between thumb and forefinger.
Geutly withdraw stylus by pulling forward out of cartridge. Grasp
replacement stylus between thumb and forefinger and insert into
stylus socket. Press stylus into socket until the 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, r e s u l t ~ n gin damage to the stylus tip or shank.
S P E C I A L N O T E : The Dynetic stylus assembly used in these cartridges is the most critical component. To maintain the original
pcrforn~ancestandards of your cartridge, be certain that any replacement stylus you buy bears the following certification on the
backape: "This Stereo Dynetic stvlus is wr~cisionmanufactured
hv S h k e Brothers. Inc. Avoid inferior imitations. They will seriously degrade the perfcrmance of your cartridge. Ail genuine "Dynetic" styli are
manufactured by Shure Brothers, Inc.
L A B O R A T O R Y T E S T F I N D I N G S : (Note: The follow in^ ntvlus
test find~ngsof the Shure N3D stylus are a n example of t%e d o s e
scrutlny Shure pays to all imitat~onShure Dynetic Styli.) Shure
laboratory tests show that the imitation stylus assemblies labeled
as replacements for the Shure Model N3D Stvlus Assemblv varv
drastically in important performance characteFistics. For example;
t h r comvliance varied frorn a low of 0.9 to a hieh of 11.5. rnauirinrr
9.0 grams to track a record with a low c o m p ~ i a n ~ s t y l u s , ~ a n d ~ "
grams with a high compliance stylus. The high compliance stylus
retracted a t 4 grams needle force, allowing the cartridge case to
drag on the record surface, thereby becomina inoaerative. Response a t high frequency (relative t o the l k c level) ranged from a
5.5db peak to a drop of 7.5db. Separation varied from "good"
(27db) to "poor" (16.5db) a t lkc. These figures Seveal that there is
very little consistency in performance characteristics of the imitation Dynetic Styli.
I n 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
Sliure performance standards for the Shure N3D Stereo Dynetic
Stvlus. I n addltion to our test findines our Servire Denartment
~.t.i.ol.dsh o w that 2,) ~ncr~.>lzing
nnl~ln'C;ero f ri$n(,iic PhXib--CirI
rl.~,lycr..; :i!.c being I . ~ . I I I II~
N card.+?
I I ~ ~ (of~ poor p~rfo~.~nnnce-and
o1:r
( , s ; ~ ~ . ~ i n : ~hns
t i , ~tlis(.los,~rl
n
that 1110stof thew returned c a r t r i d ~ e s
are using imitation Dgnetic Styli.
CONCLUSION: ~ b v i o i s l y if
, any imitation Dynetic Stylus i s used
we cannot guarantee that the performance of Shure ~ y n e t i c
cartridges will meet the published Shure specifications. Accept no
substitute.
Guarantee
The Stereo Dynetic Cartridges.and Stereo Dynetic Stvli
" -- are
--- elertnt.al
~ff
guaranteed to be free from
.
~.
.- ...- and
....- merhaniral d
-.-2cts
for
one, y e a r from the date of shipment from the factory, provided
all instructions are comphed with fully. The Guarantee does not
cover stylus wear, nor does it cover damage to the stvlus assembly from abuse or mishandling.
P A T E N T NOTICE: Manufactured under U. S. Patents 3,055,988,
3,077,521. and 3,077,522. Other patents pending.
~
-
~
~
Copyright 1968, Shure Erothers, Inc.
27A518 (7-68)
Printed in U.S.A.