Shure V-15 User manual

QUALITY ASSURANCE CERTIFICATE

SHURE

V-15

SERIES

OF

STEREO

15°

DYNETIC

HIGH

FIDELITY

CARTRIDGES

The

V-15

Stereo

15°

Dynetic

Cartridge

has

been

manufactured

under

the

Shure

Master

Quality

Control

Program.

This

program

embraces

the

stringent

safeguards

and

standards

required

by

your

V-15

to

assure

you

that

it is

in

perfect

operating

condition.

Shure

quality

control

not

only

covers

incoming

parts

and

the

finished

product,

but

intermediate

sub-assemblies

as

well.

For

example:

every

in-

dividual

cartridge

and

every

Stylus-Magnet

As-

sembly

is

tested

and

microscopically

examined.

Each

finished

cartridge

is

again

tested

electric-

ally,

mechanically

and

acoustically

against

qual-

ity

and

tolerance

specifications

seldom

achieved

in

the

High Fidelity

industry.

Manufactured

under

U.S.

Patents

3,055,988,

3,077,521,

and

3,077,522.

Other

patents

pending.

SHURE BROTHERS, INC.

222 Hartrey

Avenue,

Evanston, Illinois, U.S.A.

World standard

wherever

sound

quality

is

paramount

27A268

Printed

in

U.S.

A.

s H

U

R

E

V-15

STEREO

DYNETIC®

HIGH FIDELITY

PHONO

CARTRIDGE

THE

SOUND

FROM

THE

NEW

SHURE V-15

STEREO

DYNETIC® CARTRIDGE

WITH

ITS

REVOLUTIONARY

Bl-RADIAL

ELLIPTICAL

STYLUS

HAS

NEVER

BEFORE

BEEN

HEARD OUTSIDE

AUDIO

LABORATORIES

The

sound

from

the

new

Shure V-15

Stereo

Dynetic

Cartridge

is

unique.

The

unit

incorporates

highly

disciplined

refinements

in

design

and

manufacture

It

re-creates

music

with

a

transcendent

purity

that results in a

deeply

rewarding

experience

for the critical ear.

THE

Bl•RADIAL

ELLIPTICAL

STYLUS

The outstanding characteristic

is

that the V-15's Stylus

has

two

different radii

...

hence the designation Bi-Radial. One

is

a

broad frontal plane radius

of

17.8 microns

(.0007

inch);

while

the

actual contact radii on each side

of

the stylus are

an

incredibly

fine 5 microns

(.0002

inch).

It

would

be impossible

to

reduce the

contact radius

of

a conventional spherical/conical stylus to this

micro-miniature

dimension

without

subjecting the entire stylus

to

"bottoming"

in the record grooves.

The Shure Bi-Radial elliptical stylus, because

of

its larger frontal

radius

of

17

.8 microns

(.0007

inch), cannot

bottom

...

and

as

you know,

bottoming

reproduces the crackling noise

of

the

grit

and static dust that in practice cannot be eliminated from the

canyons

of

record grooves.

SMALL

RADIUS

5MICRONS

(.0002'')

TRACING The

prim

e obje

ctiv

e in fa it hful

so

und

re

cr

ea

tion

is to h

ave

the pl

ay

back stylus m

ove

DISTORTION

in

exac

tl

y the same way as the

we

d

ge

-

MINIMIZED shap

ed

cu

t

ting

stylus

moved

w he n

it pro-

du

ce

d the maste r r

ecor

d. This

can't

be

acco

mp

li

shed

with

a s

pheri

cal

/c

oni

cal slylus b

ec

au

se

the

point

s

of

ta

n

ge

ncy (or

po

int

s of

co

nt

ac

t be

tw

ee

n

th

e r

eco

rd

gr

oo

ves

a

nd

the stylus) are

constantly

c

han

ging. This e

ff

ec

t

manif

es

ts

it

se

lf as tracin g dis

tortion

(s

ometime

s called

"inner

groove

dis-

tortion")

. No te in

the

illustratio n h

ow

the po

int

s of

tang

ency

Cutter

Conical

(arrows)

of

the

Bi-Radia

l

elliptica l

st

ylus remain rela-

ti

vely c

on

s

tant

b

ec

au

se

of

the

ve

ry sma ll 5

mi

cro n

(.0002 in ch) s

id

e

cont

ac

t

radii.

T

he

S

hu

re

Bi

-Radial Stylus

vas

tl

y re

du

ce

s a n o

th

e r

problem

in

pla

y

ba

ck

known

as the "

pinch

effect." As

ex

pe ri e n

ce

d a

udiophil

es

know

, th e re

cor

d gr

ooves

are

wide r w

he

rever

an

d whenever

th

e

fl

a

t,

chisel-faced

cutting

slylus cha

ng

es

direct

ions

(which is 440

cy

cles

per

seco

nd

at

a p

ure

middle

"

A"

tone-up

to 20,000

cy

cles

per

seco

nd

in

some

of

the

hig

h o

vertones).

An o

rdinar

y

s

pherical/conical

stylus

riding

the

uppe

r

po

rtion

of

the

g

roove

wa

lls

tends

to

drop

w

here

t

he

g

roove

ge

ts

w

ider,

and

to rise as

the

groove

nar

rows.

Sinc

e

ste

reo

sty

li

a

nd

car

tridges

have

both

ve

rtical a

nd

horizontal

fu

nctions,

this un

fortunate

a

nd

unwanted

up-a

nd-down

mo

tion

c

reate

s a

second

harmonic

distortion.

However,

s

ince

the

S

hure

Bi-

Radial e

lliptical

stylus

has

a

broad

f

ront

face

wit

h a f1ontal p

lane

radius o f 17.8

microns

(.0007 inch),

an

d it

meas

ure

s 25.4

microns

(.0010 inch)

acro

ss

at

the

poi

nt

of

co

ntact

with

the

groove

,

the

sma

ll

side

o r

contact

radi i

are

only

5

micron,

(.0002

inc

h). This

confo

rms

to

t

he

co

nfigu1ation

of

t

he

cu

tting

sty

lus a

nd

hence

is

not

as

sub

ject

to

the

up-and-down

vagar

ies o f t

he

so-ca

lled

"

pinch-effect.

"

SYMMETRY, TOLERANCES

AND

POSITIONING ARE ULTRA-CRITICAL

Frankly

, a Bi-Radial

elliptical

stylus,

however

desirable,

is

almost

impossibly

difficult

to

make

CORRECTLY.

Diamond

, as

you

know

,

is

th

e

hardest

material

...

with

a

rating

of

10

on

the

Mohs

3

STYLUS

4

har

dn

ess scale. It

's

o

ne

thing to make a sim ple

dia

mond

co

n

e,

al

toget

he

r an

ot

her to

make

a p

erfec

t

ly

symmetrical Bi-Rad

ia

l

sty

lu

s with suffic iently

close

tol

erances,

act

ua

ll

y within o

ne

ten

thousa

ndth

s of an inch! Shure has d

eve

loped

unpr

ece

de

nted

con-

trol

s,

in

spect

ions and

manu

fact

urin

g

tec

hniqu

es

to assure preci

se

posit

i

on

ing,

co

n

fig

uration,

dim

ensions a

nd

to

lerances

of

the

diamo nd tip. It is a s

in

gular

and

exacting

pr

oce

dur

e

...

uniqu

e

in

the

hi

gh fidel ity cart

ri

dge

in

dustry. And, unless th

ese

in

spec-

tion tech

niques

and safegu a

rd

s are used, an im

pe

rfectly formed

e

lli

ptic

co

n

fig

ur

at

ion can result and literal

ly

do

more

harm

th

an

goo

d

to

bo

th

r

eco

rd

and

sound.

CARTRIDGE

RECORD

SURFACE

THE

V-15

IS

A

15°

CARTRIDGE

Th

e 15° effec

ti

ve tracking

angle has r

ece

ntly

been

the subj

ect

of

sev

eral

Sh

ure

commu

ni

cations to

the

audiophile

. It

conforms

to

the

effective

record

cutting

angle

of

15°

proposed

by

the

RIAA

and

EIA

and

now

used

by

the

major

record

producing

compani

es

and

thereby

minimizes

tracking

distortion

.

The

major

features

,

then,

of

the

V-15

are

Shure's

Bl-Radial

Elliptical tylus,

the

singular

quality

control

techniques

and

standards

devised

to

produce

perfection

of

stylus

symmetry, and

the

15°

tracking

angle

.

They

combine

to

reduce

IM

and

harmonic

distortion

lo

a

dramatic

new

low

.

In

fact

1

the

·

distortion

(at

normal

record playing velocities)

is

lowe

r

than

the

inher

.

ent

noise

lev.

el

of

the

finest test

records

and

laboratory

measurement

in-

struments!

In

extensive

listening

tests

,

the

V-15 proved

most

impressive

in its "track-ability '' It

co

ns

is

tently

proved

capable

of

tracking

the

most difficult, heavily

modulated

passages

at

a

minimum

force

of

3/4

grams

(in

the

Shure-SME

tone

arm).

The

enti

re V-15

is

hand

-

crafted

and

subject

to

quality

control

and

Inspection

measures

that

result in

space

-

age

rellability. Precision

Precision

machined

aluminum

and

a special ultra-stable

plastic

stylus grip.

Exact

alignment is

assured

in every

inte

rnal

detail-and

in

mount

-

ing.

Mu-metal

hum

shie

ld

surrounds

the

sensitive

coils.

Gold

plated

terminals

. Individually

packaged

in

walnut

box. T

he

V-15

is

a

patented

moving-

magnet

device-a

connoisseur

's

cartridge

in

every

detail.

5

6

SHURE

V-15

DIMENSIONAL

DRAWING

SHURE

600

(15.2mm)

MOUNTING

The V-

15

Dynetic

Cartridge

has s

tandard

1/2"

(12.7

mm)

mount-

ing

ce

nters (See

drawing).

Hardware

is

supplied

with

each car-

tridge

for

mounting

purposes

, In so

me

tone

arms and

plug

-

in

shells, the cartridge sits so

deep

that

the

stylus

cannot

be

con

-

ve

niently

replaced. For these

applications,

spacers are

provided

to insure

adequate

clearance

for

stylus

removal

SHURE-SME

MOUNTING:

To

mount

the V-15

in

the Shure-SME

or

the

SME

Precision

Pickup

Arm,

Model

3009 and 3012,

refer

to

the paragraphs

on

Cartridge

Ins

tallation

and

Balancing

in

the

Instruction

Manual

supplied

with

the

pickup

arms.

GARRARD

LAB

80

AND

A70

MOUNTING:

The

Garrard

Lab

80

and

A70

Pickup

He

ad

Shells have special

Briti

sh threads. In

order

to

mount

the

Shure V-15

Cartridge

, use

the

two

special

brass screws

supplied

with

the

cartridge.

NOTE:

If

hum

is

experienced

when

ca

rtridge

is

installed

in

a

metai

h

ea

d, re

moval

of

the

ground

tab

from

the

right

ground

terminal

will

probably

correct

the

condition.

(See

illustration

under

CO

NNECTIONS,

page 8.)

8

OPERATION

The

recommended

needle

forces for

optimum

results are listed

under

"Specifications." Forces greater than

the

indicated "Maxi-

mum"

should

not

be used.

Th

V-15 cartridge should

be

installed in

any

arm especially

designed for low tracking forces and having low friction at all

bearing

surfaces

such

as

the

Shure-SME

arm.

Although

the

V-15

cartridge will track records

at

3/4 gram, it may

be

necessary, when

used in

cer

tain

phono

arms,

to

increase the tracking force for

op

timum resul

ts

.

The unique Bi-Radial elliptical stylus plays

monophonic

LP

as well

as

stereo

records.

The V-15 Styli lncorporate a new retractile design that prevents

audible

record- scratch

or

styl

us

damage

. When excessive force

is

applied

to

the

stylus,

it

momen

tarily retracts and a soft plastic

safety

bumper

comes

in

contact

with

the

record. This

bumper

is incorporated

into

the stylus finger-gr

ip

and

is

pre-set

and

adjusted

at the

fa

ctory to accommodate the minute differences

between

styli.

Do

not

attemp

t to re-adjust or

in

any way tamper

with

this

precise adjustment.

NOTE:

For

playing

78

R.P.M. records

the

Model N44-3 (.0027")

Diamond Stylus

is

available.

CONNECTIONS

CAUTION:

Do

not

make

solder connections to cartridge

terminals. Make . all solder connections to terminal jacks

provided. Soldering should not be done while jacks are

on cartridge terminals.

The Model

V-15

Cartridge utilizes

a 4-terminal

arrangement

for con-

nections having a separate ground

terminal for each channel. (See

Illustration).

Fo

r Stereo reproduction terminal

"

R"

and its ground terminal "

RG

"

represent

the

right channel

(o

ut-

side groove wall). Terminal "

L"

and its ground terminal "LG" rep-

resent

the

left

channe

l (inside

groove wall),

LEFT

CHANNEL

TERMINAL

(

WHITE

RING)

RIGHT

GROUND

LEFT

TAB

CHANNEL

GROUND

TERMINAL

(BLUE

RING)

RIGHT CHANNEL

GROUND

TERMINAL

GROUNDEO

TO

CASE

(GREEN

RING)

4-Lead Stereo

Connection:

To use

a 4-lead arrangement, co

nnect

the

"hot"

lead of the right

channe

l

to

terminal

"R"

and the shield or ground lead of the right channel

to

terminal "RG." Con

nect

the

"hot"

lead of the left channel

to terminal "L" and the shield or ground lead of the left channel

to

"LG." To

prevent

"ground loops" and hum, no

common

connection

should

be

used at

the

cartridge terminals.

3-Lead S

tereo

Connection:

When a 3-lead

stereo

input system

is

used,

the

common

lead should

be

connected

to

both

of

the

ground terminals at

the

cartridge. No

other

common

ground

connection

should exist. A "

double

loop" pin jack

is

provided

to make a

convenient

connection

between

the

two

ground

terminals-simply

slide

the

loop ends

onto

the

ground terminals.

This

connection

should

be

made before

connecting

the

regular

terminal jacks to the cartridge. Connect ground pin jack

to

either

terminal. 9

For single channel reproduction

of

Monaural

or

Stereo record-

ings, connect the "hot" lead to both " R'' •and

"L"

termlnals

and

connect the ground or shield lead to both

of

the ground

terminals

marked "RG'' and

"LG.'

Double

loop

jacks

are

provided to make convenient connections between

the

"R

''

and

"L" terminals and between the two ground

terminals.

These

connections should

be

made before connecting the regular

terminal

Jacks

to the cartridge.

It

is

important to maintain correct phasing of both loudspeakers.

Although the phasing

of

rhe cartridges are carefull

y,

controlled,

there

are

many possibilities where a particular High Fidelity

sy

stem

can

cause opposite pha

si

ng

of

the sound from the

speakers.

The phasing

can

be easily checked

by

a listening

test.

Play

amonaural record.

Reverse

the connections

of

the wlres

to one speaker. This

can

be done at the amplifier

or

the speaker

whichever

is

more convenient. When the sound appears to come

from

a

point halfway between the speakers, they

are

in

phase.

Also,

ba

ss reproduction

will

be

much fuller when speakers

are

correctly

phased.

The Dynetic stylus assembly

used

in these cartridges

is

the most

critical component.

To

maintain the original performance stand-

ards

of

your cartridge,

be

certain that

any

replacement stylus

you buy

bears

the

following

certification on the package: "This

10

Dynetic stylus

is

precision manufactured by Shure Brothers,

Inc."

Avoid inferior imitations.

Th

ey

will

seriously degrade the per-

fo

rman

ce

of

your cartridg

e.

All

gen

uine

"Dynetic"

styli

are

manufactured by Shure Brothers,

In

c.

The

stylus

ass

embly, when installed in the cartridge,

is

practically

immune to damage during normal

usage.

However,

care

should

be

taken to avoid bending or distorting the

sty

lus

assemb

ly when

il

is

installed or removed.

STYLUS

REPLACEMENT

Stylus replacement

is

very simple

and

fast.

To replace-grasp

molded housing

of

stylus

between thumb and forefinger. Gently

withdraw stylus by pulling forward

out

of

cartridge. Grasp re-

placement stylus between thumb

and

fore.finger a

nd

insert

into

stylus socket.

Press

stylus

into

socket until the molded housing

of

the slylus touches Ihe cartridge

case.

Car

e must be taken

not

to

allow

the finger to

sl

ip

off

the molded hou

si

ng

of

the stylus

resulting in damage to the stylus tip

or

shank.

The

V-15

Stereo Dynetic Cartridge

is

guaranteed

to

be

free

from

electrical and mechanical de-

fects

for

one

year

from

the date

of

shipment

from

the factory, provid

ed

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.

SERVICE

PROTECTION-ACCIDENTAL DAMAGE

Shure Dynetic Styli will withstand long, con-

tinued usage. However,

ii

the stylus assembly

should be damaged

due

to accidental mis-

handling, and the diamond tip

is

still intact, the

stylus assembly may be returned

to

the factory

for

servicing and testing to original performance

standards at a nominal service charge of $7.50.

(Please

enclose a check

for

the service charge

with the returned assembly.)

Return Stylus to: Service Departme

nt

SHURE

BROTHERS, INC.

SPECIFICATIONS

Frequency

Response:

20 to 20,000

cps

Output Voltage: 6.6

mv

per channel at 1000

cps

(at 5

cm/sec)

Channel Balance: Output fr

om

each channel within 2 db

Channe

l Separation:

Over

25 db from

20

to 5,000 cps.

Over

20 db from 5,000 to 10,000

cps

Tracking for

ce:

¾ to 1 ½ grams

Compliance: vertical,

horizontal-25

x

10

·•

cm

per dyne

Recommended

Load

Impedance: 47,000 ohms (per

channel)

Inductance: 720 millihenries

D.C.

Resistance: 630 ohms

Terminals: 4 terminal (with loop pin for 3 terminal

connection)

Stylus:

VN-2E

Bi-Radial Elliptical Stylus Diamond tip.

17.8 microns (.0007 inch) frontal radius·

5 microns (.0002 inch) side contact radii;

25.4 microns (.0010 inch) wide between record

contact points

Mounting: Standard

½"

(12.7 mm) mounting center

Weight: Net

weight-11 grams

Packaged

weight-6½

ounces

(184 grams)

Shure V-15 User manual

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