Shure M73 Series Quick Start Manual

222
HARTREY
AYE.. EVANSTON. IL. 60204 U.S.A.
E l -
-
MICROPHONES AND ELECTRONIC COMPONENTS
AREACODE312/328.9000
.
CABLE:SHUREMlCRO
MODEL M71-6
DATA SHEET
STEREO DYNETICO
EASY-MOUNT
PHONOGRAPH CARTRIDGE
SPECIFICATIONS
M71 AND M73 CARTRIDGE SERIES
N71 AND N73 STYLI SERIES
Model Diamond Stylus
Number Replacement 5 cm/sec.) (Grams)
Side Contact R a d i u s :
.0004" (.010 m m )
F r o n t a l Radlus :
.0007" (.018 m m )
M71-6
I
NB71-6 Radius: 16.2 millivolts
I
Beige
I
1 % t o 3
.0006" (.015 mm)
-
M71C
1
NC71 Radius:
.0006" (.015 m m )
M73G N73G R a d i u s :
.0006" (.015 mm)
~ 7 1 . 6 a t a s t y l u s force of 1% g r a m s
400 Hz.
-
14.3 cm/sec.
N75-3,* R a d i u s : 4.4 millivolts Green
I
.O02If (.064 m m )
/
(monaural)
1
M71C a t a stylus force of
3
g r a m s
400 Hz.
-
14.3 cm/sec.
M73G a t a s t y l u s force of
1
g r a m
400 Hz.
-
14.3 cm/sec.
( H i g h e r stylus forces w i t h i n specified range improve trackability.)
F R E Q U E N C Y R E S P O N S E :
F r o m 20 to 20,000
H Z .
C H A N N E L S E P A R A T I O N :
More than 20 d b a t 1,000 Hz.
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 p e r channel
I N D U C T A N C E :
720 m ~ l l i h e n r i e s
D.C. R E S I S T A N C E :
630 ohms.
M O U N T I N G :
Standard
1:2"
(12.7 m m ) mounting center using new
"Easy-Mount" snap-sn bracket.
W E I G H T :
5 g r a m s
9.0 millivolts
6.2 millivolts
1%
t o 3
-
--
-
T E R M I N A L S :
4teI'minals
* T h e N75-3 s t y l u s m a y be used to reproduce t h e s t a n d a r d 78
rprn records. I n this case, t h e amplifier should be s e t to "Mon-
aural" or
"A+B."
T R A C K A B I L I T Y :
M71EB a t a stylus force of 1 % g r a m s
400 Hz.
-
14.3 cm/sec.
M O U N T 1 N G : T h e cartridge bracket h a s s t a n d a r d
lh''
mounting
centers. H a r d w a r e
IS
p r o v ~ d e d for mounting purposes. ( T h e brass
screws have British t h r e a d s . )
Blue
G r a y
1. Remove s t y l u s g u a r d a n d s t y l u s from cartridge. (See para-
g r a p h on stylus replacement.)
2. Remove cartridge from "Easy-Mount" snap-sn bracket. (See
F i g u r e 1 )
3 t o
5
1
t o 1 %
3. S t a r t mounting screws into tone a r m head o r plug-in shell.
4. Slip "Easy-Mount" bracket under heads of mounting screws
a n d tighten screws securely.
-
5. Connect leads t o phono-cartridge. Note color code f o r proper
connection t o terminal "L, R," "LG" a n d "RG" a s in-
dicated i n tone-arm instruction manual.
6. I n s e r t cartridge into "Easy-Mount" snap-in bracket. (See
F i g u r e 1 )
SHIELD OF CARTRIDQE MUST B E PLACED
~ : ~ $ R , ~ ~ : ~ ~ ~ : : E ~ ~ B ~ : ~ ~ ~ ~ ~ O C K I N G
\
OARTRIDOE BUMP IN
HOLE OF
B R A G S E T .
7
\--LIFT
HERE
W I T H ~ n u w N A l L
FOR REMOVAL OF
B R A C K E T .
CARTRIDGE AND BRACKET ASSEMBLY
FIGURE I
7. T h e top of t h e "Easy-Mount" bracket should be flush against
t h c top of the tone arnl head f o r proper playing position,
unless other mounting instructions a r e supplied b y t h e
rccord changer/tone a r m manufacturer.
8. Reinsert stylus.
CONNECTIONS
4 - L E A D S T E R E O C O N N E C T I O N :
Connect "hot" lead of r i g h t
channel to terminal "R" a n d shleld o r ground lead of r i g h t chan-
nel to terminal "RG." Connect "hot" lead of left c21annel
f?
ter;
rr~inal "I2" a n d shield o r ground lead of left channel t o
LG.
T o prevcnt "ground loops" and hum, no common c o n n e c t ~ o n
should be used a t cartridge tcr'minals.
M O N A U R A L C O N N E C T I O N :
F o r single channel reproduction of
Monaural or St(:r.c'o recol.dings, conncct "hot" lead t o both "R"
a n d
'.L"
ter.rriinals a n d connect ground ,pr shield lead t o both
g r o u n d terrnlnals rriarked "RG" a n d "LG.
C A U T I O N :
Do not make solder connections to cartridge termi-
nals. Makc all solder connet:tions to tcrrninal jacks provided
before slipping them over t h e terminals.
Sugges4ions for Cleaning Your Stylus
To clean t h e s t y l ~ l s , use a camel's-hair b r u s h (No. 2 size o r
snlallrr) dipped h g h t l y in alcohol. T h e alcohol will remove a n y
sludge deposlts whlch rriay have coated t h e s t y l u s t ~ p . T h e b r u s h
111.istles should be trimrnt2d to a length no longer t h a n inch.
Always
brush tile stylus w l t h a f o r w a r d nlovement from t h e r e a r
(tc.rrrlina1 vnd of t h e cartridge) t o t h e f r o n t .
Never
b r u s h o r wipe
the stylus from f r o n t t o back o r slde to side.
EASY STYLUS REPLACEMENT
Grasp rnolded housing of stylus
betwec,n t h u m b anti for.efinger. Gently
withdraw stylus b y pulllng forward
o u t
( ~ f
cartriilgi.. Grasp replacrrrifmt
stylus between t h u m b a n d forefinger
a n d insert into s t y l u s s o c k ~ t . P r c s s
stylus into socket until molded Rnus-
i n g of t h e stylus mates w i t h t h e
cartridge case. Ca1.e rrlust be taken
not to allow thc
finger
to slip off
the rriolded h'ousing of t h e stylus.
resulting in dsrrlagc t o the stylus
tip or, shank.
STYLUS REPLACEMENT
FIGURE 2
S P E C I A L N O T E :
T h e Dynetic s t y l u s assembly used i n thcsc car-
tritlges is t h e Iriost cr.~tical corriponent. T o maintain tllc original
p>e~,to~.rrlanci~ st:~ndal.ds
o f
your cartridge, be certain t h a t a n y re-
plact.rnent stylus you b u y hears t h e following certification on t h e
paclcagt,: "This Stel.t'o Dynt.tic stylus is precision manufactured
b y Shure Brothers Inc."