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LENCO L 75 - System Connections and Adjustments; Electrical Connection Guide; Anti-Skating Device Function; Anti-Skating Force Setting Example

LENCO L 75
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5.
Turn
screw
(20)
on
arm-lifting
device
until
the
distance
between
it
and
the
rubber
nipple
on
the
tonearm
is
about
2mm.
6.
Place
the
pick-up
arm
on
to
the
pick-up
rest
(9).
The
needle
of
the
cartridge
must
not
touch
the
On/Off
switch
(12).
If
necessary
adjust
the
height
of
the
pick-up
rest
by
loosening
the
screw
in
the
bush
at
its
base.
Electrical
Connection
The
shielded
pick-up
cable
(27)
is
provided
with
a
standard
plug
which
can
be
connected
to
a
loud-
speaker
or
radio.
This
connection
is
indicated
as
«GRAMMO»,
«TA,
«PICK-UP»
or
«Q»
on
the
radio.
Later
models
of
amplifiers
or
radios
of
European
‘origin
have
been
fitted
with
a
standard
socket
which
fits
the
L75.
To
connect
to
other
or
older
models
with
different
sockets
a
shielded
interme-
diate
cable
should
be
used.
When
the
unit
has
been
connected
(27)
to
the
electric
mains
it
is
ready
for
use.
Anti-Skating
Device
Modern
pick-up
design
for
geometrical
reasons
re-
sults
in
a
force
being
imparted
on
to
the
stylus
of
the
pick-up
cartridge
by
the
record,
which
pulls
it
towards
the
centre
of
the
record.
This
force
is
cal-
led
skating
force.
Its
effect,
especially
with
low
sty-
lus
pressures,
is
to
the
stylus
to
jump
seve-
fal
grooves
when
the
arm
is
set
on
to
the
record.
The
different
pressures
on
the
two
sides
of
the
groove
caused
by
the
skating
force
also
introduce
a
certain
amount
of
distortion.
This
distortion,
as
we
the
jumping
of
the
stylus,
can
be
avoided
when
the
skating
force
is
compensated
for.
For
this
reason
an
anti-skating
device
is
supplied
with
the
L75
Arm,
Heavy
Type.
Assembly
of
the
anti-skating
device
on
tonearm:
Notches
4294567
Vroaet
Press
bent
steel
rod
(3)
in
hole
«A»
on
top
of
tone-
arm.
Fig.
2
Push
semi-circular
clamp
(23)
on
tonearm
support
«Bs
as
per
drawing.
The
pip
on
the
semi-circular
clamp
must
locate
into
the
hole
on
the
tonearm
support.
Setting
of
the
Anti-Skating
Device
Before
setting
the
anti-skating
device,
check
th
the
arm
has
been
correctly
set
as
described
earlier,
Setting
of
the
correct
anti-skating
force
depends
on
two
factors,
namely
a)
the
stylus
pressure,
b)
the
tip
radius
of
the
stylus
of
the
cartridge
being
used.
Two
separ
ti-skating
hts
are
supplied
with
the
L
75,
namely
a
1g
and
a
4g
weight.
A
list
of
settings
for
all
stylus
pressures
and
tip
radii
is
shown
in
Table
2
on
the
last
page.
Example
To
set
the
anti-skating
force
for
a
cartridge
for
which
the
recommended
stylus
pressure
is
1.5
pond,
and
of
which
the
stylus
has
a
tip
radius
of
18
mu.
(.0007"),
Table
2
shows
that
for
a
stylus
pressure
of
1.5
pond
and
stylus
tip
radius
of
.0007"
the
1g
weight
should
be
used
on
Notch
6.
Therefore
hang
the
1
g
weight
(22)
over
Notch
6
passing
the
thread
‘over
the
adjacent
hollow
in
the
cork-screw
(23)
80
BF
40
Shure
M
75
MB
II
B+0SP6
Pickering
AME
3
Goldring
800
Lenco
M94

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